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 covariant return type?

1123

Explain different forms of polymorphism?

1161

Is there any difference between synchronized methods and synchronized statements?

1109

Tell us something about an iterator.

975

Write a code to show a static variable?

1103

What is super?

1183

Can we declare a static variable inside a method?

1017

What do you understand by soft reference?

1074

If a class is declared without any access modifiers, where can the class be accessed?

1075

What is instance synchronization?

1063

What is callablestatement? How you can call stored procedure to pass in parameter?

1039

Are the imports checked for validity at compile time? Will the code containing an import such as java.lang.abcd compile?

1117

What is the common usage of serialization?

1164

What is a prefix function.write down a code to compute prefix function.

1070

What are some alternatives to inheritance?

1122

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Un-Answered Questions { Core Java }

Can you override private or static method in java?

993

What is the difference between super class & sub class?

1213

What purpose do the keywords final, finally, and finalize fulfill?

1109

Write a program to reverse array in place?

1086

What is isa relationship?

1076

What is a java string?

1097

How does map works in java?

1015

Why arraylist is not synchronized in java example?

1082

Is sizeof a keyword in java programming?

1074

How do you remove an element from an arraylist in java?

1022

Can java run on google chrome?

1213

Is there any limitation of using inheritance?

1102

How hashmap increases its size in java?

1005

What is math in java?

1077

How do you identify independent and dependent variables?

1027

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