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 3922

Describe OOP in java?

Syntel,

2 4284

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 4558

What is serialVersionUID and what is its need?

KPIT,

1 3747

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 6486

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 6106

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Un-Answered Questions { Core Java }

What's a method in programming?

1078

In java, what is the difference between method overloading and method overriding?

1123

What is java in detail?

1066

what are Hostile Applets?

2083

Where will it be used?

1941

What is the static field modifier?

1130

When do we need to use internal iteration? When do we need to use external iteration?

1125

What is a boolean structure?

1089

What is an infinite loop? How infinite loop is declared?

1111

What is a byte array?

1101

Is vector ordered in java?

998

how to write a program for sending mails between client and server

2073

This abstract class is correct ? abstract class A { public abstract void Disp(); public abstract void B() { } public absract virtual C() { } }

989

Can singleton class be inherited in java?

1004

Why we used break and continue statement in java?

1145

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