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

Core Java Interview Questions

Questions Answers Views Company eMail

Can I declare a class as private?

1084

Can a constructor be protected?

1085

Can a class with private constructor be extended?

940

Can a final variable be null?

1013

Can a static class have a constructor?

999

Are private methods final?

901

Can a class have multiple subclasses?

1101

What is instance means in java?

1043

Is string is a data type in java?

1054

What is replacefirst in java?

1100

What is substring in java?

1216

What is substring 1 in java?

1154

What is regex in java?

945

What is a buffer in java?

1028

What is string [] java?

947

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Un-Answered Questions { Core Java }

What are the library functions in java?

1041

What is number data type?

1023

What is internal iteration in java se 8?

1194

Explain about serializable interface in java?

995

Can main() method in java can return any data?

1177

Implement a stack with push (), pop() and min() in O(1) time.

1107

Do loops java?

1011

How many types of java are there?

973

Where are the local variables stored?

1070

What is anti pattern in cyber security?

1017

Can I import same package/class twice?

952

What is the difference between variable & constant?

1018

What is the purpose of void class?

1062

Can we force the garbage collection to run?

945

Explain when noclassdeffounderror will be raised ?

1043

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