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

Core Java Interview Questions

Questions Answers Views Company eMail

How do you achieve singleton?

973

Can we use static class instead of singleton?

1051

What is a singleton in genetics?

1064

Can we extend singleton class in java?

959

What does singleton mean in java?

995

How many ways can you break a singleton class in java?

979

Can I extend singleton class in java?

1097

What is a singleton factory?

954

Can we clone singleton object?

1060

What is a pattern what is an anti pattern?

970

Why is singleton not thread safe?

1048

What does this () mean in constructor chaining concept?

1123

What are thread safe functions?

946

What is not thread safe?

982

What are the pillars of java?

920

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Un-Answered Questions { Core Java }

Can you instantiate the math class?

1057

What is mean by collections in java?

1170

What is a null point?

1069

What are java annotations?

1155

When will you define a method as static in Java?

1058

Explain about procedural programming language or structured programming language and its features?

1094

Explain the difference between treeset and treemap in java?

969

What restrictions are placed on method overloading in java programming?

1051

How do you do math powers in java?

1059

What are 4 pillers of object orinted programming?

1013

What is protected in java?

993

What are the different types of data structures in java?

988

When is the finally clause of a try-catch-finally statement executed?

1061

Can a string be null?

979

What is maximum size of arraylist in java?

1024

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