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 advantages of exception handling in java?

1074

When do we use synchronized methods in java?

1099

What are thread priorities and importance of thread priorities in java?

1235

What is method overriding in java ?

1259

Assume a thread has lock on it, calling sleep() method on that thread will release the lock?

1165

What are user defined exceptions?

1096

Difference between overriding and overloading in java?

1122

What is difference between length and length() method in java ?

1056

Can we have multiple classes in single file ?

1121

Explain what access modifiers can be used for methods?

1127

What is super keyword in java ?

1 1940

Explain java coding standards for methods?

1093

Explain about member inner classes?

1160

Can we override static methods in java?

1125

What is jit compiler ?

1043

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Un-Answered Questions { Core Java }

I don’t want my class to be inherited by any other class. What should I do?

1062

Explain the difference between an object-oriented programming language and object-based programming language?

1027

Which way a developer should use for creating thread, i.e. Sub classing thread or implementing runnable.

990

Are arrays classes in java?

1109

Which collection allows duplicate values in java?

1030

Explain garbage collection in java?

1042

Explain about static nested classes in java?

1114

What is the public field modifier?

1084

What are variable arguments or varargs?

1067

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

1032

What does math floor () do?

1012

Can we force garbage collector to run ?

1109

What are static initalizers in java ?

1068

What is difference between iterator access and index access?

1117

Are generics important java?

1043

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