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

Core Java Interview Questions

Questions Answers Views Company eMail

What is method Overloading in the perspective of OOPS?

6 10572

What is method Overriding in the perspective of OOPS?

TCS,

4 8259

What is numeric promotion?

1 4968

What is persistence ?

2 5713

What is procedure overloading?

2258

What is protected and friendly?

1 5543

What is serializable interface?

Infosys, Probity Soft, Seed Infotech,

13 33184

What is the difference between serialization and deserialization?

ABC,

3 16760

What is singleton class?

3i Infotech, 7 Seas, ABC, Amdocs, Cap Gemini, Oracle, Persistent, TCS, Techforza,

16 71912

What is synchronization? How it can be achieved?

2 11870

What is the % operator?

2 5174

What is Collection interface?

Zensar,

1 5957

What is Collections API?

1 4659

What is the Dictionary class?

1 4218

What is the GregorianCalendar class?

HCL,

2 5988

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Un-Answered Questions { Core Java }

What is multiple inheritance? Is it supported by java?

933

Which browsers work with java?

1038

How can we make copy of a java object?

1092

What is a java list?

1058

What does isempty () do in java?

1016

explain different ways of using thread? : Java thread

972

Is void a data type?

913

What are the states of thread in java?

933

What is fundamental datatype?

950

Is arraylist an object in java?

1075

List some important characteristics on jre

1036

What is default switch case? Give example.

966

What does business logic mean?

956

What are design patterns and please explain?

1048

What is the full meaning of java?

1006

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