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 static initalizers in java ?

1031

What about interrupt() method of thread class ?

1092

Explain notify() method of object class ?

1124

What about abstract classes in java?

1084

What about main thread in java?

1141

I want to persist data of objects for later use. What’s the best approach to do so?

956

What about main() method in java ?

1033

What is a local class in java?

1062

What about features of local inner class?

1086

Can we instantiate interface in java?

1151

Which api is provided by java for operations on set of objects?

1486

What access modifiers can be used for variables?

1167

Explain wait() method of object class ?

1243

Can we cast any other type to boolean type with type casting?

970

What about interthread communication and how it takes place in java?

1075

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Un-Answered Questions { Core Java }

What is difference between ++ I and I ++ in java?

997

What does sprintf mean?

962

How to declare an arraylist in java?

1128

Is singleton class immutable?

983

What is static in java?

1109

Write a code to create a trigger to call a stored procedure

998

Difference between class#getinstance() and new operator ?

1229

What are the differences between wait() and sleep()?

1032

What are data types in oop?

1049

What is class variable java?

1024

what happens when a thread cannot acquire a lock on an object? : Java thread

1062

What is the maximum size of list in java?

987

What does file separator do in java?

1028

What about static nested classes in java?

1161

Differentiate storage classes on the basis of their scope?

1184

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