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 bytecode in java ?

1207

Why there are some null interface in java? What does it mean?

1145

How can you add and remove nodes in jtree?

1061

State the main difference between c++ and java?

1105

What are the three best choices for a development environment?

1136

What are the steps involved to create a bean?

1177

Explain about the dynamic behavior of core java?

1150

What is the use of beaninfo?

1062

Give the difference between the println method and sqrt method?

1100

Why do you canvas?

1058

Explain about strings in java?

1082

Is there any tag in htm to upload and download files?

1058

Explain about the performance aspects of core java?

1076

What is the method to expand and collapse nodes in a jtree?

1064

Suppose if we have variable ' I ' in run method, if I can create one or more thread each thread will occupy a separate copy or same variable will be shared?

1072

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Un-Answered Questions { Core Java }

Can keyword be used as identifier?

980

Why is logger singleton?

1143

Are constructors methods?

1047

Can we extend private class in java?

996

how we can create packages in java?

988

What is the difference between preemptive scheduling and time slicing in java programming?

1037

What is size_t?

996

What's the access scope of protected access specifier?

1058

What does the ‘static’ keyword mean? Is it possible to override private or static method in java?

1002

What is the benefit of inner classes in java?

1109

What is the size of int in 64-bit jvm?

1119

What is the major advantage of external iteration over internal iteration?

1120

Which package is imported by default?

1098

How do you sort a set in java?

925

What is another word for methodology?

1036

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