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

Core Java Interview Questions

Questions Answers Views Company eMail

Can a class extend abstract class or interface? why

Wipro,

4 9663

What is the difference between Access Modifier and Access specifier?

1 7159

Is it possible to write method inside method

L&T,

4 11980

what is the default value of a variable char?(If not assigned)

4 7391

Write a java program to get a string of words and print the numbers of each word count in descending order

Logica CMG, Subex,

11 30789

Where can I find data structures question and answers with comprehensive working code written in Java

Amazon,

2418

if the memory capacity is 700 presently occupied by process is 690. then another process request space(40) how this situation handled in java.

Wipro,

4 6993

what is the logic inside any default constuctor?

2 4418

How TreeMap sorts the objects inside it?? suppose if have include one employee object and one car object. On what basis it will sort?

5 14653

Java is based on pass by reference or pass by value ..

L&T, Wipro,

6 10926

difference between arraylist and linkedlist otherthan performance

L&T,

2 10681

why pointer is not used in java?

3 11740

what are the difference between Java and .Net?

5 8530

can any body body expalin best definitions & best real time exaples for opps concepts.

Accel,

2268

What is map and hashmap? also tell the difference.

1 4327

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Un-Answered Questions { Core Java }

Why does java not support operator overloading?

1140

Can we define constructor in inner class?

1005

Can you change array size in java?

965

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

1039

Difference between static and dynamic class loading.

1124

Write a java program that prints all the values given at command-line.

1011

What are the different types of multitasking?

1108

What is a methodologist?

1069

how to write a server program and sending the mails to the server using smtp protocol please help me

2066

Explain about fail safe iterators in java?

1024

Is hashset sorted in java?

1185

What is parsing a string?

1174

What is singleton class and how can we make a class singleton?

1100

What is Java Package and which package is imported by default?

1096

Variable of the boolean type is automatically initialized as?

1011

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