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 10675

Are nested try statements are possible?

2 5294

Is multiple inheritance allowed in Java? Why ?

7 12178

Is 'null' a keyword?

8 10194

Is 'sizeof' a keyword?

7 17975

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

3 8400

Are there any tools available in java to create reports?

5 9505

Explain Connection Pooling?

3 9211

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

1 4195

Can you give names of Container classes?

Ordain Solutions,

2307

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

3 7805

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

3 5831

What are the names of Component subclasses that support painting?

1 3780

What are teh sub-classes of a component class?

2 5045

Name two subclasses of the TextComponent class?

2 6951

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Un-Answered Questions { Core Java }

Explain the inheritance?

980

What is the difference between an inner class and a sub-class?

1022

What is a hashmap used for?

1250

Why string is immutable or final in java

1093

Can you call one constructor from another if a class has multiple constructors?

1040

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1701

How to write custom exception in java?

1060

Name four container classes.

994

What types of index data structures can you have in java?

1238

What is meant by flickering?

1084

How does hashset works in java?

1097

What is size_t?

984

What are the pillars of java?

920

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

1003

How does multithreading take place on a computer with a single cpu?

1009

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