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 are the different ways of implementing thread? Which one is more advantageous?

995

What is the covariant return type?

1104

Explain a few methods of overloading best practices in java?

992

Is it possible for a yielded thread to get chance for its execution again?

948

What is the static keyword?

1091

What is the most important feature of java? What is an interface?

1020

What best practices should you follow while writing multithreaded code in java?

1081

How do you convert string to int in java?

1083

What is the difference between final, finally and finalize() in java?

1169

What is an immutable object?

1106

How do you identify if jvm is 32-bit or 64-bit from java program?

974

Explain the importance of throws keyword in java?

1002

Explain why wait(), notify() and notifyall() methods are in object class rather than in the reading class?

991

What is the difference between @before and @beforeclass annotation?

1115

What is the java reflection api? Why it’s so important to have?

989

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Un-Answered Questions { Core Java }

Which class is used by server applications to obtain a port and listen for client requests?

971

What is variable and example?

970

Why hashset is used in java?

1084

What is a condition in programming?

1019

what is the final keyword denotes in java?

1098

What modifiers are allowed for methods in an interface?

1172

Give few difference between constructor and method?

977

Is null a string or object in java?

973

Which is best ide for java?

1053

What is the difference between choice and list?

1098

Difference between ‘is-a’ and ‘has-a’ relationship in java?

1015

How java is similar to c?

1059

What is a constructor overloading in java?

1050

Is intellij better than eclipse?

1099

What is string in java?

1022

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