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 are synchronized methods ?

1131

What is a lock or purpose of locks in java?

1044

In how many ways we can do synchronization in java?

988

What is difference between c++ and java ?

1141

Explain a situation where finally block will not be executed?

1058

Explain yield() method in thread class ?

1079

What is class level lock ?

1047

What happens if we don’t override run method ?

1025

Explain about static nested classes in java?

1079

Can we create constructor in abstract class ?

1076

Explain purpose of sleep() method in java?

1139

What does null mean in java?

1089

How to do encapsulation in java?

1064

Can one thread block the other thread?

1043

Explain about instanceof operator in java?

1067

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Un-Answered Questions { Core Java }

How does hashset works in java?

1106

What is ‘has a’’ relationship in java?

1240

What is string in java with example?

1055

Can an object subclass another object?

1136

What is the major advantage of external iteration over internal iteration?

1120

Which java ide is used the most?

1026

What is java lang string?

1014

What is OOP's Terms with explanation?

1207

Give an example of use of pointers in java class.

1045

What do you mean by inner class in java?

1105

Can we write multiple catch blocks under single try block?

1104

What programs use java?

977

How many types of string data types are there?

1112

How to store image in arraylist in java?

992

What is prime number in java?

1015

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