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 the difference between set and list?

5 40825

Explain the difference between the Boolean & operator and the && operator?

1 8822

What are File and RandomAccessFile classes?

2 6922

What are Font and FontMetrics classes?

1 7007

In which JDK version event-delegation model is introduced?

1 4239

Difference between the String and StringBuffer classes?

3 7281

Difference between the paint() and repaint() methods?

1 15334

Difference between prefix and postfix forms of the ++operator?

3 9925

What is the difference between throw and throws?

IBM,

11 23599

What is yielding and sleeping? how they different?

2 6239

What is Unicast and Multicast object? Where we will use?

Scope International,

1 4042

Explain the difference between Unicast and Multicast objects?

1 5143

What is the frontend and backedn in Java?

TCS,

3 9951

What is the difference between static and non-static variables?

6 25936

What is the difference between the >> and >>> operators?

1 5352

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Un-Answered Questions { Core Java }

Can a class extend 2 classes in java?

1053

How does hashset works in java?

1103

What are the properties of thread?

942

Can we sort hashmap in java?

970

do I need to use synchronized on setvalue(int)? : Java thread

1023

what is object slice?

2094

Why do we need variables?

1000

Define a package.

1102

Why static functions are used?

1111

What is difference between identifier and variable?

1081

Is array passed by reference in java?

1042

How big is a 64 bit float?

1040

What is java basic concept?

1055

What is a locale?

1163

What does null mean in java?

1087

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