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

Core Java Interview Questions

Questions Answers Views Company eMail

A class can be a subclass of itself?

Genesis,

2 10539

Are nested try statements are possible?

2 5186

Is multiple inheritance allowed in Java? Why ?

7 11929

Is 'null' a keyword?

8 9908

Is 'sizeof' a keyword?

7 17734

Does any tag exists in HTML to upload and download files ?

3 8269

Are there any tools available in java to create reports?

5 9325

Explain Connection Pooling?

3 9051

What classes can be used to store arbitrary number of objects ?

1 4112

Can you give names of Container classes?

Ordain Solutions,

2263

What are the names of interfaces that doesn't consists of method/s ?

3 7634

What primitive Java types? Howmany are they and what are their names?

3 5674

What are the names of Component subclasses that support painting?

1 3693

What are teh sub-classes of a component class?

2 4923

Name two subclasses of the TextComponent class?

2 6825

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Un-Answered Questions { Core Java }

How do you sort an array in java?

943

What are the advantages of exception handling?

1016

Why is serialization required?

920

What does serializing data mean?

901

What are 4 pillers of object orinted programming?

955

What is implicit object in java?

1031

Explain the difference between abstract classes and interfaces in java?

1105

Is Constructor possible in abstract class in java ?

999

How many bits is a 64 bit byte?

1012

Difference between notify() method and notifyall() method in java?

921

Why do we need data serialization?

934

Is void a type?

934

What is numel matlab?

1261

How to avoid memory leak in java?

1086

Is it possible to define a method in java class but provide it’s implementation in the code of another language like c?

991

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