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

Core Java Interview Questions

Questions Answers Views Company eMail

If you are reviewing the code of your team members, what points will you look at, assuming the performance of the application is not so great

KPIT,

2 6398

How will you convert an ArrayList to Arrays?

KPIT,

4 9456

steps to connect with Oracle Databse using TYPE-2 Jdbc driver.

3 12063

what are the methods of an object class?

3 6487

can u give one sinario when you use Abstract Class and When you use Interface.

ITC Infotech,

5 9966

Nullpointer exception is a very common exception. Why is it not made as a checked exception?

Ness Technologies,

2 7868

What is the difference between Checked and Unchecked exception? Give some examples

Ness Technologies,

2 8138

What is the purpose of having the concept of overloading?

Ness Technologies,

7 18912

How does Vector implement synchronization?

Ness Technologies,

4 12539

What is meant by Encapsulation? Can you write a class to explain encapsulation?

Ness Technologies,

8 16939

What is meant by event handling in SAX parser?

Ness Technologies,

1 6305

When you say String is immutable, what do you mean by that? Say I have String s = "Ness" s= s+"Technologies"; What will happen? If the value gets appended, then what is the meaning of immutable here?

Ness Technologies,

5 17336

Java violates few objected oriented concepts. Can you explain in what way?

Ness Technologies,

3 9171

Why java Don't Support Multiple interitence

ABC, Exilant, IBM,

8 14915

In Java why we write public static void main(String args[]) why not main()?

Aptech, GE Healthcare, Infosys, Microsoft, New Horizon, Practical Viva Questions, TCS, Wipro,

46 110124

Post New Core Java Questions

Un-Answered Questions { Core Java }

What is ascii format?

1036

What is meant by flickering?

1135

How to display arraylist values in java?

1072

What is array and arraylist in java?

1170

What is difference between jdk,jre and jvm?

1194

How do singleton patterns work?

1021

What is a function in programming?

1102

what is bmg file and how to create that files?what will it contailn?

2398

Can a class be declared as static?

1225

How do you compare values in java?

1096

What are the advantages and disadvantages of reference counting in garbage collection?

1075

Is null a string?

1055

What is the difference between iterator and enumeration ?

1046

What is difference in between java class and bean?

1166

What is double in java?

1044

For More Un-Answered { Core Java } Questions Click Here