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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 3385

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

IBM,

1 3049

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

Cognizant,

1 3581

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

Wipro,

1 3215

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

Avaya,

1 3720

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

Agiline, FINO PayTech, HCL,

2 3921

Describe OOP in java?

Syntel,

2 4279

What is difference between overloading and overriding?

Accenture,

2 5188

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

Virtusa,

1 4012

How do we make a class serialize?

Syntel,

3 4556

What is serialVersionUID and what is its need?

KPIT,

1 3746

What is deserialization and how do we do deserialization?

Synechron,

3 4819

What is difference between compatible and incompatible changes in serialization?

Synechron,

1 4312

What is Difference between Serializable and Externalizable in Java serialization?

Cognizant, IBM,

1 4108

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

IBM,

4 5449

Un-Answered Questions { Java J2EE }

What are the 3 different types of Groups?

899

When servlet object is created?

1161

What do you understand by a Static Variable?

1214

Is set ordered?

977

What is replacefirst in java?

1109

What is sorting algorithm in java?

1075

What is classname class in java?

1067

What is indexof?

987

Why is java more secure?

931

What is core java called?

974

Difference between final and effectively final ? Why is effectively final even required ?

992

can I implement my own start() method? : Java thread

991

What does yml stand for?

412

What are restrictions on triggers?

2232

How many bytes is string in java?

1252

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