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 are the methods of object class ?

1008

What are different types of inner classes ?

995

What is stringjoiner ?

918

Difference between final and effectively final ?

1030

Difference between abstract and concrete class ?

1092

Can we create an object if a class doesn't have any constructor ( not even the default provided by constructor ) ?

1032

Can we access instance variables within static methods ?

1048

What is the use of optional ?

991

Difference between doublesummarystatistics, intsummarystatistics and longsummarystatistics ?

949

Difference between final and effectively final ? Why is effectively final even required ?

941

Similarity and difference between static block and static method ?

882

Difference between class#getinstance() and new operator ?

1156

What is a lambda expression ? What's its use ?

1058

Describe what happens when an object is created in java ?

955

Difference between == and .equals() ?

956

Post New Core Java Questions

Un-Answered Questions { Core Java }

What is constructor in java ?

1129

Can a final method be overloaded?

895

What is the main use of generics in java?

928

Break statement can be used as labels in java?

957

Why convert an applet to an application?

1050

What is a programming object?

1026

Can a class have a static inner class?

1032

Explain about static imports in java?

956

Can a function return a function?

999

Difference between ‘is-a’ and ‘has-a’ relationship in java?

957

What access modifiers can be used for methods?

1049

What is local class in java?

1035

What is nested class?

952

Explain the polymorphism principle?

970

What is the difference between hashset and treeset in java?

1014

For More Un-Answered { Core Java } Questions Click Here