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 the difference between state-based unit testing and interaction-based unit testing?

946

What are the methods used to implement for the key object in the hash map?

1059

What is the association?

1001

Explain jvm, jre, and jdk?

1022

What is the difference between iterator and list iterator?

1051

What do the thread?class methods run() and start() do?

1053

Which class contains a method: cloneable or object?

1062

What are the different tags provided in jstl?

969

What is the final keyword?

1003

Differentiate jar and war files?

1055

What is defined as false sharing in the context of multithreading?

1057

What is the difference between abstract class and interface1? What is an interface?

1099

What is an inner class in java?

983

What is a ternary operator in java?

999

How do you check if two given string are anagrams?

983

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Un-Answered Questions { Core Java }

What is the difference between an interface and an abstract class?

1020

Why does abstract class have constructor?

1016

Can we override compareto method?

959

How can the checkbox class be used to create a radio button?

1050

What is use of functional interface in java 8? Explain

1035

What is quick sort in java?

1036

When is finally block not called?

1107

What is the difference between checked exception and unchecked exception?

1028

Can a class have an interface?

1012

What is instanceof keyword?

1236

Is empty in java?

1071

why using interface interface ?

2059

When can an object reference be cast to an interface reference in java programming?

1038

What is join () in java?

979

Differentiate between vector and array list.

1076

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