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Java Related Interview Questions
Questions Answers Views Company eMail

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

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

32 75404

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 13881

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

Wipro,

7 14722

What is an abstract class?

DBS, Wipro,

7 13092

How can final class be used?

Accenture, Wipro,

5 13848

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

Wipro,

1 13499

Java support what type of parameter passing ?

Wipro,

7 17467

Explain the term serialization?

Wipro,

10 16034

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

Infosys, Wipro,

10 17930

What is Overriding and how can it be used?

Consagous, Wipro,

7 18756

How is serialization used generally ?

 3 7925

How are Swing and AWT be differentiated?

Wipro,

3 8697

Explain pass by reference and pass by value?

IBM, Wipro,

8 17798

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 11952

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 55207

Un-Answered Questions { Java Related }

What are restrictions on triggers?

1704

What is the main difference between java platform and other platforms?

540

Can an interface extend another interface?

632

How do generics work in java?

556

What are peerless components?

664




Explain the term proxy?

166

What is the use of namespace in action mapping in Struts2?

603

Is Java a dying language?

604

What are the different modules used in spring?

336

What is the difference between the ‘font’ and ‘fontmetrics’ class?

675

What is 'applet container' ?

638

What is a method in programming?

673

How do I insert/update records with some of the columns having NULL value?

546

Can this keyword be used to refer static members?

578

Explain about the performance aspects of core java?

591

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