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 9843

What is the difference between Access Modifier and Access specifier?

1 7258

Is it possible to write method inside method

L&T,

4 12145

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

4 7542

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 31170

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

Amazon,

2482

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 7180

what is the logic inside any default constuctor?

2 4518

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 14836

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

L&T, Wipro,

6 11152

difference between arraylist and linkedlist otherthan performance

L&T,

2 10811

why pointer is not used in java?

3 11862

what are the difference between Java and .Net?

5 8692

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

Accel,

2319

What is map and hashmap? also tell the difference.

1 4406

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Un-Answered Questions { Core Java }

Difference difference paint() and paintcomponent()?

1055

Give me example of derived data types.

1208

What is a boolean field?

1005

What are the advantages of assembly language?

965

What do you mean by access modifier?

1111

Is upper case in java?

1010

Why unicode is important?

978

What is unicode with example?

1310

What's the default access specifier for variables and methods of a class?

1166

What is qualitative variable?

975

What happens if an exception is throws from an object's constructor?

1179

Can we use a default constructor of a class even if an explicit constructor is defined?

1145

What are pass by reference and pass by value?

1039

Can substring create new object?

1189

Define canvas?

1028

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