Core Java Interview Questions
Questions Answers Views Company eMail

What is garbage collection in Java, and how can it be used ?

Infosys, HCL, Accenture, Wipro, Sara, SITS,

32 51292

Differentiate Vector and ArrayList?

Wipro, Max Telecom,

6 5847

Differentiate constructor and a method and how are it be used?

Wipro,

6 6390




What is an abstract class?

Wipro,

7 5327

How can final class be used?

Wipro, Accenture,

4 7135

By what default value is an object reference declared as an instance variable?

Wipro,

1 8318

Java support what type of parameter passing ?

Wipro,

7 9638

Explain the term serialization?

Wipro,

10 7722




Is there is any error if you have multiple main methods in the same class?

Wipro,

10 8985

What is Overriding and how can it be used?

Consagous, Wipro,

7 11845

Explain pass by reference and pass by value?

IBM, Wipro,

8 9669

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 6126

What happens when a main method is declared as private?

L&T, DELL, Infosys, Sun Microsystems,

20 28163

Is there any need to import java.lang package?

Sun Microsystems,

13 12638

What is UNICODE?

3 3359


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Un-Answered Questions { Core Java }

Where can i get Latest SUN Certification Dumps and what are the Sun Certification Codes that are available, Im new to JAVA, so please gimme info as i need to write J2EE - Core Java Certification

491


What methods are used in Servlet?Applet communication?

802


How to add and remove nodes in Jtree?

1158


how to run ecllipse with jettyserver for windows environment using batch file

652


Which of the following is not an isolation level in the JDBC

668


What is Applet Stub Interface ?

996


what are the disadvantages of indexes in oracle?

859


how to write a server program and sending the mails to the server using smtp protocol please help me

611


if u open login & logout ,how can udisplay the timelogin & logout members ?

606


What is the main functionality of the remote reference layer?

417


how to know the total memory occupied by the objects in the ArrayList(Array list may contain duplicate objects)

614


whatis Home interface and Remoteinterface? with example?

657


How do you sing an Applet ?

886


I want to store more than 10 objects in a remote server? Which methodology will follow?

1514


please send me hr interview questions in it industry

644