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 concurrent hashmap and its features?

1108

List the interfaces which extends collection interface?

965

Explain wrapper classes in java?

1014

Explain oops concepts in detail?

1039

Explain methods specific to list interface?

995

Explain about object oriented programming and its features?

1025

Explain illegalmonitorstateexception and when it will be thrown?

1121

Explain about serializable interface in java?

1015

Explain naming conventions for packages?

1045

When wait(), notify(), notifyall() methods are called does it releases the lock or holds the acquired lock?

1027

Explain about collection interface in java?

998

Explain restrictions on using enum?

1108

What is the difference between access specifiers and access modifiers in java? 16

1013

Define iterator and methods in iterator?

977

Explain about sets?

1039

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Un-Answered Questions { Core Java }

How are the elements of a gridbaglayout organized in java programming?

995

What is the purpose of garbage collection in java, and when is it used?

1051

What are the fileinputstream and fileoutputstream?

1079

Can main() method in java can return any data?

1197

What are dot operator queries?

1124

How many types of exception can occur in a java program?

1003

What is the meaning of variables in research?

1048

Where pragma is used?

1062

What is definition and declaration?

1039

What is the use of isempty in java?

1041

What is string subsequence method?

1149

What is the point of java?

1040

What is package private scope in java?

957

What are thread priorities and importance of thread priorities in java?

1154

what is abstract class in Java?

1131

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