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 to perform selection sort in java?

1006

Is empty .java file name a valid source file name?

1137

Can I import same package/class twice?

968

What are the super most classes for all the streams?

5 2606

Why java uses the concept of the string literal?

1076

What is the static block?

1086

How can we create an immutable class in java?

1082

What do you understand by java virtual machine?

1209

Name some classes present in java.util.regex package.

1053

How can an object be unreferenced?

1042

What is the inheritance?

984

What are the differences between abstract class and interface?

1115

What is the static variable?

1137

Can we initialize the final blank variable?

1106

How to make a read-only class in java?

1186

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Un-Answered Questions { Core Java }

Explain why wait(), notify() and notifyall() methods are in object class rather than in thread class?

1027

How do you write a good declaration?

996

What is implicit object in java?

1098

What is difference between local variable and global variable?

1040

What is the difference between sop and work instruction?

937

What is a instance variable in java?

1063

Can we restart a dead thread in java?

1019

What is a nested structure?

1063

How does hashset works in java?

1106

What's the purpose of using break in each case of switch statement?

1006

What does int [] mean in java?

1048

What is dynamic binding(late binding)?

1058

Can we sort hashset in java?

1103

Can we override private constructor in java?

992

Explain 5 io best practices?

1053

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