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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain JPA in Java.

1 724

Briefly explain the term Spring Framework

1 702

Difference between static methods, static variables, and static classes in Java.

1 809

What is a Java Virtual Machine?

1 711

. Define Copy Constructor in Java

1 728

Can Java be said to be the complete object-oriented programming language

1 713

Define Wrapper Classes in Java.

1 670

Define package in Java.

1 691

. Differentiate between instance and local variables.

1 770

. Explain Java String Pool.

1 714

What happens when the main() isn't declared as static?

1 706

Why is Java a platform independent language?

1 799

Why is the main method static in Java?

1 790

What part of memory - Stack or Heap - is cleaned in the garbage collection process?

1 707

What is the difference between the program and the process?

1 809

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Un-Answered Questions { Core Java }

How can you set an applet’s height and width as a percentage?

874

What is merge sort in java?

912

Explain the importance of finalize() method.

916

When we serialize an object does the serialization mechanism saves its references too?

969

what is meant by HQL?

1011

Can a constructor be private and how are this() and super() method used with constructor?

936

What is jpa specification?

917

What is instance example?

900

Explain super keyword in java.

992

Write a java program to check if a number is prime or not?

985

How can a gui component handle its own events?

1041

What is the purpose of the system class in java programming?

1004

What is thread safe java?

867

I want my class to be developed in such a way that no other class (even derived class) can create its objects. Define how can I do so?

1117

Explain implementation and how is it different from conversion?

1017

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