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 is cloneable interface?

8 18783

How many methods does cloneable interface contains?

6 11235

What is a compilation unit?

2 4486

What is a default package ?

7 11705

What is a layout manager?

1 3941

What is a native method?

2 5405

What is a reflection package?

2 5551

What is a serializable interface?

4 8098

What is a stream? what are the different types and classes of Streams?

2 8278

What is unicode?

1 4958

What is a void return type?

6 20600

What is adapter class?

12 53783

What is an Iterator interface?

2 5817

What is an abstract class and abstract method?

5 16024

What is an enumeration class?

2 6080

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Un-Answered Questions { Core Java }

Write a program to find maximum and minimum number in array?

996

What is reflexive association?

1798

Class c implements interface I containing method m1 and m2 declarations. Class c has provided implementation for method m2. Can I create an object of class c?

1612

Why do we override tostring method in java?

959

How we can declare a static variable?

1106

Is java map thread safe?

954

What is the association?

979

What is an exception? difference between Checked and Unchecked exception in Java

1012

What is deserialization?

1028

What is object-oriented programming?

1105

What do you mean by object?

971

Can we override compareto method?

944

What is sleep method?

1146

Write a program to find the whether a number is an Armstrong number or not?

1020

What is an object class?

1024

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