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

Core Java Interview Questions

Questions Answers Views Company eMail

Which keyword specify that a variable is effectively final ?

992

Which access specifier can be used with class ?

1000

How can we run a java program without making any object?

1044

What will happen if there is a default method conflict as mentioned above and we have specified the same signature method in the base class instead of overriding in the existing class ?

964

Explain about anonymous inner classes ?

1083

What one should take care of, while serializing the object?

903

When do you get classcastexception?

1031

Explain method local inner classes ?

1034

Difference between object instantiation and construction ?

1068

Difference between this() and super() ?

1114

What are different ways of object creation in java ?

1078

How can we create objects if we make the constructor private ?

1013

What is a final class ?

1181

Explain inner classes ?

1128

Can static method access instance variables ?

1137

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Un-Answered Questions { Core Java }

What is nullpointerexception?

1072

what is the swingutilities.invokelater(runnable) method for? : Java thread

1040

What is prefix of a string?

1041

What are the two types of java programming?

1064

What are facelets templates?

1035

What is hasnext in java?

1017

Explain hashset and its features?

1153

What is a memory leak in java?

1074

What is a concrete classes? Is Java object class is concrete class?

983

Write an algorithm for quick sort?

1032

What is the preferred size of a component in java programming?

1004

What is the access scope of a protected method?

1030

What about main thread in java?

1121

What is the difference between procedural and object-oriented programs?

973

What is difference between c++ and java ?

1124

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