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

Core Java Interview Questions

Questions Answers Views Company eMail

Can I use % with real numbers?

1042

Why is the type for real numbers called double?

975

Explain when we should make an instance variable private.

1140

What is finalize()?

1211

When should we create our own custom exception classes?

1035

Can we pass a primitive type by reference in java? How

949

When do I need to use reflection feature in java?

1094

Why does java have two ways to create child threads? Which way is better?

1070

Why does java have different data types for integers and floating-point values?

1028

What is byte code and why is it important to java’s use for internet programming?

1151

Is finalize() similar to a destructor?

1042

Explain the difference between protected and default access.

1016

Explain how to convert any java object into byte array.

989

What is finalize()? Is finalize() similar to a destructor?

983

Explain the use of shift operator in java. Can you give some examples?

991

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Un-Answered Questions { Core Java }

Explain about OOPS concepts and fundamentals.

1065

Which method you will use to create a new file to store some log data. Each time a new log entry is necessary, write string to the file in java ?

1180

What are the 8 data types in java?

1015

what is meant wrapper classes?

1227

What is array initialization in java?

1117

How do you sort a string in java?

974

How hashmap works in java?

1063

What is an exception? difference between Checked and Unchecked exception in Java

1028

What is the independent variable in an experiment?

978

Can a constructor call another constructor?

999

Can we write class inside a class in java?

997

What is the driver class?

1059

What is linkedlist in java?

1022

What is the use of conditional statement?

1001

What are variable arguments or varargs?

1020

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