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?

1150

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

1 1438

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

929

How infinite loop is declared?

973

What is default switch case? Give example.

965

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

1096

How are destructors defined in java?

995

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

987

What is ternary operator?

968

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

1 1476

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?

968

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

1061

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

1127

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Un-Answered Questions { Core Java }

What is nested class?

954

How big is a gigabyte?

1000

What is difference between calling start() and run() method of thread?

1053

What does flagged out mean?

1012

How many arguments can be passed to main ()?

948

What is the purpose of final keyword and when to use it?

957

What is the use of hashmap in java?

1032

What is assembly used for?

976

When is an object subject to garbage collection?

1003

Can we have any code between try and finally blocks?

973

What are the java ide’s?

994

What are the restrictions imposed on method overriding?

969

How are variables stored in memory?

1010

What is instance synchronization?

1011

What are the pillars of java?

875

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