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.

1 838

Briefly explain the term Spring Framework

1 817

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

1 940

What is a Java Virtual Machine?

1 796

. Define Copy Constructor in Java

1 829

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

1 831

Define Wrapper Classes in Java.

1 763

Define package in Java.

1 804

. Differentiate between instance and local variables.

1 873

. Explain Java String Pool.

1 823

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

1 812

Why is Java a platform independent language?

1 903

Why is the main method static in Java?

1 901

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

1 824

What is the difference between the program and the process?

1 904

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Un-Answered Questions { Core Java }

What is empty list in java?

1075

Why does java have two ways to create child threads?

955

Should database connections be singleton?

963

What is command line used for?

1093

Is call by reference possible in java?

965

What does string intern() method do?

1085

What does it mean to flush a file?

1069

What is a char in java?

1041

Does java vector allow null?

959

Why constructor has no return type?

1099

how to write a program for sending mails between client and server

2073

Is 0 an irrational number?

1068

What is prefix of a string?

1041

What is the difference between normal report & matrix report?

1110

Is boolean a data type in java?

961

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