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

Core Java Interview Questions

Questions Answers Views Company eMail

Why do we need hashset in java?

1042

What is default size of arraylist in java?

1156

What is an off by one error in java?

955

Which sorting algorithm is best in java?

981

What is use of map in java?

1011

What is the default size of arraylist in java?

1128

What is heterogeneous in java?

962

What is array initialization in java?

1097

What is the order of arraylist in java?

1137

What is immutability in java?

1090

What is arrays aslist in java?

955

What is the use of toarray () in java?

1071

What is dynamic array in java?

1026

What is treeset in java?

1003

What is the use of arrays tostring () in java?

1039

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Un-Answered Questions { Core Java }

Explain the importance of finally block in java?

967

What is super in java?

997

What is api data?

1000

Can we override singleton class?

983

Can you add null to a list java?

1057

What is polymorphism in java? What are the kinds of polymorphism?

1072

define polymorphism in java

1089

what is the constructor and how many types of constructors are used in java?

1004

What do you understand by copy constructor in java?

931

What is difference in between java class and bean?

1091

What is dynamic array in java?

1026

What is an inner class in java?

969

What is java volatile?

1050

What is difference between module and function?

1180

Is null == null in java?

1107

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