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 use of valueof () in java?

1049

What is flush () in java?

1006

What is immutable class in java?

938

How do you use substring in java?

1132

How do I remove a character from a string in java?

961

Why do we need strings in java?

983

What does replaceall do in java?

911

How do you replace a string in java?

1001

What does n mean in java?

964

What is == in java?

1014

Why inputstreamreader is used in java?

1015

What is charat java?

958

How do you check if a string is lexicographically in java?

952

What is use of static in java?

1172

What is :: operator in java?

966

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Un-Answered Questions { Core Java }

If try block is successfully executed, Then Is Finally block executed?

1084

What is Java Annotations?

1098

What are the three best choices for a development environment?

1112

What is the use of a conditional inclusion statement in Java ?

1091

Difference between arraylist and hashset in java?

1126

What is collection class in java?

1003

Can a class have a static inner class?

1075

Why is boolean important?

1059

What is the console in java?

1148

I want to persist data of objects for later use. What is the best approach to do so?

1057

How many bytes are a float?

983

How to retrieve data from database in java using arraylist?

1054

what is thread in Java ?

1158

What is mnemonic code?

1012

What is the difference between multiple processes and multiple threads?

1200

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