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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 74522

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 13560

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

Wipro,

7 14389

What is an abstract class?

DBS, Wipro,

7 12815

How can final class be used?

Accenture, Wipro,

5 13652

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

Wipro,

1 13400

Java support what type of parameter passing ?

Wipro,

7 17180

Explain the term serialization?

Wipro,

10 15648

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

Infosys, Wipro,

10 17593

What is Overriding and how can it be used?

Consagous, Wipro,

7 18470

How is serialization used generally ?

 3 7750

How are Swing and AWT be differentiated?

Wipro,

3 8562

Explain pass by reference and pass by value?

IBM, Wipro,

8 17487

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 11725

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 54416

Un-Answered Questions { Java Related }

What are assembly attributes?

537

What is optional in java 8? What is the use of optional?advantages of java 8 optional?

485

Does jdbc use ssl?

492

Can we have multiple public classes in a java source file?

547

What is proper subset?

528




What is variable declaration and definition?

536

Why is autowired used?

152

What is data persistence in java?

615

What is java util concurrentmodificationexception?

489

What is use of i18n interceptor?

529

Explain the difference between string, stringbuffer and stringbuilder in java?

549

Describe action form?

521

What is servlet lazy loading?

688

How can we make a class virtual?

631

Difference between character constant and string constant in java ?

548

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