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

Core Java Interview Questions

Questions Answers Views Company eMail

Why null interfaces are used in Java?

2 8210

What is a Wrapper class?

14 43655

Write a program for recursive Traverse?

1 6114

Write a program to create a binary Tree ?

2 9023

what are Hostile Applets?

2023

what is a transient variable?

5 11364

what is the JNDI?

3 6483

What JNDI(Java Naming and Directory Interface) provides?

4 7172

Explain, why the constructor is required in implemented class?

4 7823

is java support call by reference and call by value, if supports please explain?

5 21668

what is the difference between the "protected and default" modifiers?

8 23663

where u use Abstraction and Interface in real time

Sonata,

3 8746

Difference between JDK, JRE, JVM

Deloitte, HCL, Mind Tree, Oracle, Reliance, TCS, ThinkBox,

16 95945

what do you meant by Platform-Independent?

Persistent,

6 13528

Why Java is not purely object oriented?

Elitecore, Persistent, Reliance, Wipro,

50 76878

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Un-Answered Questions { Core Java }

Which method cannot be overridden in java?

958

What is final class?

969

Can we override final method?

948

How do you do math powers in java?

1018

What is functional interface in javatpoint?

983

What are the types of java?

1037

Write an algorithm for quick sort?

973

What do you mean by static variable?

1028

How to display arraylist values in java?

965

What does file separator do in java?

980

What methods are used in Servlet?Applet communication?

2187

What is a string token?

971

Define "Access specifiers" in java.

1127

What are the different types of data structures in java?

947

What is the difference between synchronized and synchronized block?

1011

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