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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain wait(), notify() and notifyall() methods of object class ?

1077

How to instantiate member inner class?

1101

Is this valid in java ? Can we instantiate interface in java?

1000

Explain about main() method in java ?

1085

What is an exception in java?

1126

Which is the best approach for creating thread ?

1231

Can we define package statement after import statement in java?

1049

How to instantiate static nested classes in java?

1104

Will the compiler creates a default constructor if I have a parameterized constructor in the class?

1127

Explain about interrupt() method of thread class ?

1138

Can we have more than one package statement in source file ?

1055

Explain differences between checked and unchecked exceptions in java?

1078

Can we have any code between try and finally blocks?

1037

If two threads have same priority which thread will be executed first ?

1499

Explain creating threads by extending thread class ?

1061

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Un-Answered Questions { Core Java }

What is a flag variable?

983

What is indexof?

997

What are the different types of inheritance in java?

1004

How can we make string upper case or lower case?

1094

What is the difference between JDBC 1.0 and JDBC 2.0?

3203

Is it possible to compare various strings with the help of == operator?

1010

Explain java coding standards for interfaces?

1126

What is native method in java?

1077

What are green threads in java?

1018

Why to use nested classes in java?

1135

What is class variable java?

1022

What are the different data types in java?

1022

Explain the public class modifier?

968

Do you need to import math in java?

1024

What is the history of java?

1020

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