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

Core Java Interview Questions

Questions Answers Views Company eMail

How many times garbage collector will invoke an object?s finalize() method?

4 7476

How applets will communicate with each other?

1 4291

What method is used to compare two strings ?

4 10228

How to know the host from which Applet is originated?

Wipro,

1 3570

How to prevent a field from serialization ?

2 10180

How to add panel to a Frame?

5 14852

How can a class be accessed, If no access modifiers are declared?

4 7842

How to access a method that it declared as protected?

3 6401

How to access a variable if it is declared as private?

3 7150

How to re-get an object that is collected by garbage collector?

1 4142

What we have to do, when we don't want to implement all methods of an interface?

5 8371

How to display names of all components in a Container?

Microsoft, Wipro,

2936

Name the package that most of the AWT events that supports event-delegation model are defined?

2 6499

What are Inner classes?

4 7251

Is &&= a valid Java operator?

2 13476

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Un-Answered Questions { Core Java }

how its run?

1061

Is ++ operator is thread safe in java?

953

Can we clone singleton object in java?

1013

What does nullpointerexception mean?

1078

Define inheritance?

1013

What is basic syntax?

1035

What is the concept of multithreading?

983

Why are arrays useful in java?

1026

What about member inner classes?

1092

Is it possible to use string in the switch case?

1041

Explain the importance of throws keyword in java?

993

What are design patterns and please explain?

1082

Is cout buffered?

1178

What is the purpose of static methods and static variables?

1071

What are methods of a class?

1028

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