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

Core Java Interview Questions

Questions Answers Views Company eMail

Can we execute java program without main method?

1123

Can a static class have a constructor java?

1000

What does this () mean in java?

996

What is return type in java?

1080

Can we write a class without main method in java?

972

Does every java program need a main?

1010

Is void a keyword in java?

1033

What is the main method java?

1047

What does 3 dots mean in java?

1002

What is ellipsis in java?

1098

Why we use methods in java?

1019

Why main method is called first in java?

1023

Why java is call by value?

1043

Are arrays passed by reference in java?

929

Is call by reference possible in java?

977

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Un-Answered Questions { Core Java }

Why we use set in java?

1014

How can you read content from file in java?

1019

What are the advantages of encapsulation in java?

1026

In a container there are 5 components. I want to display all the component names, how will you do that?

2204

Define Multiprogramming and Multiprocessing in java.

1162

What is boolean strategy?

1147

which pattern is default in scanner package?

2247

Is jdk required on each machine to run a java program?

1319

Can you start a thread twice in Java?

1135

What is the super void?

913

What do you mean by jjs in java8?

1021

Differentiate between run time error and syntax error.

1152

Does string isempty check for null?

1049

Can we call thread start () twice?

971

Is constructor inherited?

981

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