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Java J2EE Interview Questions
Questions Answers Views Company eMail

What are legal modifiers that we can use to declare an inner class?

Infosys,

1 3374

What is difference between “==” and equals()?

IBM,

1 3044

Why do we need to override equals() and hascode() method of object class?

Cognizant,

1 3566

How to override equals() and hashCode() method in java?

Wipro,

1 3208

Are the equals() and hashCode() protected methods of object class?

Avaya,

1 3710

What are the uses of final, finally and finalize in java?

Agiline, FINO PayTech, HCL,

2 3905

Describe OOP in java?

Syntel,

2 4270

What is difference between overloading and overriding?

Accenture,

2 5169

Why do we need main method to execute a java program?

Virtusa,

1 4005

How do we make a class serialize?

Syntel,

3 4543

What is serialVersionUID and what is its need?

KPIT,

1 3735

What is deserialization and how do we do deserialization?

Synechron,

3 4790

What is difference between compatible and incompatible changes in serialization?

Synechron,

1 4298

What is Difference between Serializable and Externalizable in Java serialization?

Cognizant, IBM,

1 4100

What is an object in Java and what are its benefits?

IBM,

4 5425

Un-Answered Questions { Java J2EE }

What is jdbctemplate in spring? And how to use it?

403

What is mulicast and unicast in weblogic?

1013

What are the different types of ioc?

390

What is the requirement of thread in java?

1043

Explain the difference between awt and swt.

1018

What is struts2 in java?

1037

Give me some null interfaces in java?

1051

How do you remove duplicates from an array in java?

951

What are the steps in which unicode codesets can be set with the weblogic jdriver?

968

What is a memory leak in java?

1068

What are struts in java?

908

What is the disadvantage of java?

950

Print Vertical traversal of a Binary Tree.

1012

What is meant by hibernate tuning?

356

What is message-driven bean?

1024

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