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

Core Java Interview Questions

Questions Answers Views Company eMail

In the below example, what will be the output?

983

What is the default access specifier for variables and methods of a class?

1148

What are the two ways of implementing multi-threading in java?

1 1433

What's the difference between comparison done by equals method and == operator?

924

How infinite loop is declared?

972

What is default switch case? Give example.

964

What is the difference between double and float variables in java?

1092

How are destructors defined in java?

994

In the below example, how many string objects are created?

986

What is ternary operator?

968

Can a class be a super class and a sub-class at the same time? Give example.

1 1471

What's the access scope of protected access specifier?

991

I want to re-reach and use an object once it has been garbage collected. How it's possible?

965

How can we pass argument to a function by reference instead of pass by value?

1054

Can main() method in java can return any data?

1124

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Un-Answered Questions { Core Java }

Why is singleton instance static?

958

What is "this" keyword in java? Explain

1058

What is the meaning of course?

1054

Why pass by reference is not possible in java?

969

What is parameters example?

975

What is meant by design patterns?

985

How do I get a substring?

935

How is abstraction implemented in java ?

923

What are multiple inheritances? Is it supported by java?

895

Explain the difference between transient and volatile in java?

962

What is an object's lock and which object's have locks in java programming?

1005

Why can't we use static class instead of singleton?

896

What is Session reduplication and how its done?

1992

Why is multiple inheritance not supported in java?

973

How does the java compiler work?

921

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