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?

1124

Can a constructor be protected?

1128

Can a class with private constructor be extended?

999

Can a final variable be null?

1056

Can a static class have a constructor?

1055

Are private methods final?

946

Can a class have multiple subclasses?

1151

What is instance means in java?

1096

Is string is a data type in java?

1117

What is replacefirst in java?

1169

What is substring in java?

1299

What is substring 1 in java?

1233

What is regex in java?

991

What is a buffer in java?

1069

What is string [] java?

1006

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Un-Answered Questions { Core Java }

Explain how to convert any java object into byte array.

1012

What is java console application?

1065

What is the advantage of functional interface in java 8?

1046

what are Hostile Applets?

2146

How many types of methods are there?

1117

What is integer parseint?

1052

What are the different access modifiers available in java?

1074

Why does it take so much time to access an applet having swing components the first time?

1983

What is the difference between C++ and Java and your preferences?

1159

What is the use of flag?

1135

Name some OOPS Concepts in Java?

1133

Why we do exception handling in java and how many types of exceptions are there?

1177

What is use of map in java?

1056

Can an interface implement another interface?

1089

What is the use of isempty in java?

1076

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