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Java J2EE 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 95872

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 28688

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

Wipro,

7 29350

What is an abstract class?

DBS, Wipro,

8 27748

How can final class be used?

Accenture, Wipro,

5 27480

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

Wipro,

1 26556

Java support what type of parameter passing ?

Wipro,

7 20204

Explain the term serialization?

Wipro,

10 31405

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

Infosys, Wipro,

10 33557

What is Overriding and how can it be used?

Consagous, Wipro,

7 33274

How is serialization used generally ?

 3 21360

How are Swing and AWT be differentiated?

Wipro,

3 22385

Explain pass by reference and pass by value?

IBM, Wipro,

8 32518

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 25482

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 74462

Un-Answered Questions { Java J2EE }

What is @requestbody in spring?

411

Is hibernate sessionfactory singleton?

385

What is a connection string used for?

971

Tell me about networking classes and interfaces.

1050

What is metaspace?

1036

Can variables be used in java without initialization?

1086

Which file is used by controller to get mapping information for request routing?

1064

to update a batch in a table in jdbc which method of statement object is used

2087

state the three ways to enable verbose gc.?

990

Why the node manager is required?

1069

What is a databasemetadata?

948

Why do we use hibernate framework?

355

What is difference between jms and activemq?

871

Where are the card layouts used?

1068

Is jdbc part of j2ee?

983

For More Un-Answered { Java J2EE } Questions Click Here