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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 3386

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

IBM,

1 3050

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

Cognizant,

1 3584

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

Wipro,

1 3216

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 3922

Describe OOP in java?

Syntel,

2 4285

What is difference between overloading and overriding?

Accenture,

2 5189

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

Virtusa,

1 4017

How do we make a class serialize?

Syntel,

3 4559

What is serialVersionUID and what is its need?

KPIT,

1 3747

What is deserialization and how do we do deserialization?

Synechron,

3 4821

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 4109

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

IBM,

4 5451


Un-Answered Questions { Java J2EE }

What is entity manager in hibernate?

366


What is dependency injection in spring?

441


What is java literals?

1134


What is cascade in hibernate in which scenario we use it?

382


Differentiate between the get and post method

1064


What is the use of dao in spring?

400


What is current_session_context_class in hibernate?

346


When servlet object is created?

1162


What is hibernate bag collection?

323


What is string and its types?

1187


Can a lock be acquired on a class in java programming?

991


If we don’t want some of the fields not to serialize how to do that?

1014


Does @override do anything?

448


What is a messaging bridge?

983


Which java technology is in demand?

972