Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

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

How is object created in java?

Cap Gemini,

5 6482

What is the life-cycle of an object?

Broadridge, Syntel,

2 7496

why static class in java or what is use of static class in java

SunGard,

3 5048

Tell me the programme for this @ 1 2 @ @ @ 1 2 3 4

Accenture, iGate, IntoNET, Value Labs,

5 6104

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Un-Answered Questions { Core Java }

What is the arraylist in java?

1053

When do we use synchronized methods in java?

1045

What is prime number in java?

995

What is null statement?

1013

Explain about sets?

1023

What is instance example?

952

What do you understand by final value?

1060

What do you mean by global variable?

953

What is difference between an object and a class?

1126

What is lossy conversion in java?

1208

What are the differences between heap and stack memory in java?

1057

What is binary search in java?

995

Explain all java features with real time examples

1719

What an i/o filter?

1017

Is there any difference between nested classes and inner classes?

1098

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