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

Core Java Interview Questions

Questions Answers Views Company eMail

How to create an immutable class?

1112

Explain the importance of finalize() method.

969

Why a dead thread occurs?

979

Why synchronization is important in java?

1046

What are different types of states exist for a thread?

1011

is it possible to instantiate the math class?

1039

Explain how to force the garbage collection in java.

969

Can you explain the usages of class.forname()?

1074

What is an immutable class? How to create an immutable class?

1068

What is a java object and java application?

1057

Explain the significance of listiterator.

1108

Define reflection.

1002

What is the best way to findout the time/memory consuming process?

1032

What is polymorphism in java? What are the kinds of polymorphism?

1076

What is final?

1080

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Un-Answered Questions { Core Java }

What is a string token?

1053

What do you meant by active and passive objects?

1087

Is string is a keyword in java?

978

Can we create our own daemon thread?

982

What are the types of methodology?

1106

What is the purpose of using break in each case of switch statement?

1029

What is arraylist class in java?

1071

Explain the difference between an Interface and an Abstract class?

1175

Which java collection does not allow null?

1155

Explain about static nested classes in java?

1071

What is java volatile?

1055

What are the data types supported by java?

1028

Why string objects are immutable in java?

1049

Where are local variables stored?

969

What is memory leak and how does java handle it?

985

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