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, TCS,

32 58399

Differentiate Vector and ArrayList?

Wipro, Max Telecom,

6 8378

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


7 8902

What is an abstract class?

Wipro, DBS,

7 7729

How can final class be used?

Wipro, Accenture,

5 9672

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


1 10931

Java support what type of parameter passing ?


7 12267

Explain the term serialization?


10 10098

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

Wipro, Infosys,

10 11428

What is Overriding and how can it be used?

Consagous, Wipro,

7 13832

Explain pass by reference and pass by value?

IBM, Wipro,

8 12304

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 8025

What happens when a main method is declared as private?

L&T, DELL, Infosys, Sun Microsystems,

22 37686

Is there any need to import java.lang package?

Sun Microsystems,

13 15501

What is UNICODE?

3 4686

Post New Core Java Questions

Un-Answered Questions { Core Java }

why an outer class cannot be declared as private?


What is the main functionality of the remote reference layer?


how to open and edit XML file in Weblogic???


In a container there are 5 components. I want to display all the component names, how will you do that?


How will you serialize a singleton class without violating singleton pattern?


We are seeing so many videos/audios as many web sited. But question is these videos or audios are stored in Databases ( Oracle, Mysql, Sybase,... ) or stored any file directory from there they will give the link for that? Pls explain and give sample code to achieve this one? Thanks, Seenu.


What is the java project architecture?




how to deploy apache tomcat server to weblogic server in java


EDS (Electronic Data Systems India Pvt Ltd) at Chennai on 16-12-2006.


What is procedure overloading?


2) Suppose there are 5 directories having lot of files (say txt files) in each directory. 2 things :- 2.1) You want to search for filenames which have a particular pattern. 2.2) Out of these filtered files you want to search for a particular keyword or a search string. How can you achieve this?


Hi Anyone know the model / questions of the Federal bank sample questions for the post of Specialist Officers - Programmers. Please post if anyone have..


Why does java doesnt suuport unsigned values?


hi am an engineering student and my next plan is for ms in either in us or australia i got my passport but i dont know anything bout visa can u give brief idea 1)How to get prepared for visa and 2)How to apply for top universities and 3)How to pay the fee and so on These all are basic questions plz give me a clear idea