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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 3488

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

IBM,

1 3155

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

Cognizant,

1 3682

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

Wipro,

1 3302

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

Avaya,

1 3825

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

Agiline, FINO PayTech, HCL,

2 4033

Describe OOP in java?

Syntel,

2 4390

What is difference between overloading and overriding?

Accenture,

2 5332

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

Virtusa,

1 4111

How do we make a class serialize?

Syntel,

3 4739

What is serialVersionUID and what is its need?

KPIT,

1 3876

What is deserialization and how do we do deserialization?

Synechron,

3 4988

What is difference between compatible and incompatible changes in serialization?

Synechron,

1 4421

What is Difference between Serializable and Externalizable in Java serialization?

Cognizant, IBM,

1 4190

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

IBM,

4 5624

Un-Answered Questions { Java J2EE }

What is the difference between iterator and list iterator?

1116

What is the final keyword in java?

1538

Explain The Methods For Providing User Credentials For Starting The Server ?

1102

Why we use named query in hibernate?

438

What is difference between jsp and servlet?

1215

How does java enable high performance?

1207

Explain in the metadata contained in the beandefinition objects.

538

What is a nonetype?

1197

What is hibernate entitymanager?

519

How can I determine the isolation levels supported by my DBMS?

1047

What is SingleThreadModel interface?

1222

What are the core classes of the struts framework?

1005

What is a spring ioc container?

454

Which is faster set or list in java?

1081

What is inversejoincolumns?

420

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