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 return null in java?

986

Where is java located?

1070

What is treeset in java collection?

981

What is map and hashmap in java?

1083

Is null in java?

1036

What is the arraylist in java?

1071

What is queue in java?

1166

Why do we need array in java?

1034

Why arraylist is not synchronized in java example?

1085

What is the use of arraylist in java?

1114

What is a arraylist in java?

1091

Which is better list or arraylist in java?

883

Why do we override tostring method in java?

990

What is the default size of set in java?

978

What is the maximum size of hashmap in java?

1025

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Un-Answered Questions { Core Java }

What is pass by value?

961

How many decimal places is a double?

1004

How do you reverse sort in java?

976

What is collection sort in java?

967

How java is similar to c?

1063

What is java util?

1036

Why a dead thread occurs?

994

What are the Static and Dynamic Variables? Differentiate them.

1133

What does jre stand for?

1083

I don’t want my class to be inherited by any other class. What should I do?

1031

What is use of set in java?

1031

Why is flag used in java?

1090

What is ascii code?

1296

Does anyone still use java?

1129

In java, how we can disallow serialization of variables?

1014

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