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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 6399

How will you convert an ArrayList to Arrays?

KPIT,

4 9465

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

3 12067

what are the methods of an object class?

3 6491

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

ITC Infotech,

5 9968

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

Ness Technologies,

2 7871

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

Ness Technologies,

2 8143

What is the purpose of having the concept of overloading?

Ness Technologies,

7 18923

How does Vector implement synchronization?

Ness Technologies,

4 12541

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

Ness Technologies,

8 16945

What is meant by event handling in SAX parser?

Ness Technologies,

1 6306

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 17337

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

Ness Technologies,

3 9175

Why java Don't Support Multiple interitence

ABC, Exilant, IBM,

8 14916

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 110141


Post New Core Java Questions

Un-Answered Questions { Core Java }

Can we make a constructor final?

1089


Where pragma is used?

1100


Can a class be defined inside an interface?

1084


Why lambda expression is used in java?

1124


What are design patterns and please explain?

1140


What are exceptions

1155


Is node a data type in java?

1062


What is an i/o filter?

1988


What is a linkedhashmap java?

1061


Can we have return statement in finally clause? What will happen?

1021


What is class array in java?

1131


When should you use arraylist and when should you use linkedlist?

987


What is the purpose of abstract class?

1065


What is final keyword in java? Give an example.

1065


What is difference between pointer and reference?

1131