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 10673

Are nested try statements are possible?

2 5290

Is multiple inheritance allowed in Java? Why ?

7 12160

Is 'null' a keyword?

8 10182

Is 'sizeof' a keyword?

7 17963

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

3 8390

Are there any tools available in java to create reports?

5 9497

Explain Connection Pooling?

3 9200

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

1 4190

Can you give names of Container classes?

Ordain Solutions,

2306

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

3 7798

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

3 5826

What are the names of Component subclasses that support painting?

1 3775

What are teh sub-classes of a component class?

2 5038

Name two subclasses of the TextComponent class?

2 6945

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Un-Answered Questions { Core Java }

What is the base class of all exception classes in java?

1056

What is the final method?

1073

What are the limitations of procedural programming approach?

1052

What is static and final keyword in java?

1023

Give any two differences between C++ and java.

1146

Can we have any code between try and catch blocks?

988

Is it possible to use Semaphore/ Mutex in an Interrupt Handler?

1092

Is string thread safe in java?

1091

How do you sort a list in java?

1033

What are the difference between composition and inheritance in java?

1027

Is java code slower than native code?

1061

Which is a valid identifier?

1210

How big is a 32 bit integer?

1044

Can an interface extend another interface?

1055

Explain about map interface in java?

994

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