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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 6171

How will you convert an ArrayList to Arrays?

KPIT,

4 9077

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

3 11831

what are the methods of an object class?

3 6238

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

ITC Infotech,

5 9612

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

Ness Technologies,

2 7683

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

Ness Technologies,

2 7905

What is the purpose of having the concept of overloading?

Ness Technologies,

7 18494

How does Vector implement synchronization?

Ness Technologies,

4 12219

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

Ness Technologies,

8 16381

What is meant by event handling in SAX parser?

Ness Technologies,

1 6134

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 16960

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

Ness Technologies,

3 8913

Why java Don't Support Multiple interitence

ABC, Exilant, IBM,

8 14325

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 107575


Post New Core Java Questions

Un-Answered Questions { Core Java }

Is 0 a real number?

981


What are 3 data types?

932


What are daemon Threads in java?

1134


What are the restriction imposed on a static method or a static block of code?

1007


What is a instance variable in java?

992


What is public static void main?

1054


Can subclass overriding method declare an exception if parent class method doesn't throw an exception?

1009


State the merge-sort principle and its time complexity.

931


What is the common usage of serialization? What exceptions occur during serialization?

1060


What is the technique adopted to create an immutable class?

1047


What is the difference between static method and instance method in Java?

1140


what is the significance of listiterator in java?

1039


State some situations where exceptions may arise in java?

1005


What all access modifiers are allowed for top class ?

1148


What are the practical benefits, if any, of importing a specific class rather than an entire package (e.g. Import java.net.* Versus import java.net.socket)?

1080