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

Core Java Interview Questions

Questions Answers Views Company eMail

What is meant by Servelet? What are the parameters of service method?

2 6014

What is meant by Session? Explain something about HTTP Session Class?

1 9222

how to make hashmap object as synchronized object?

BOB Technologies,

2 4611

how to execute main()

Symphony, TCS,

4 6276

can we overload main method?

TCS,

8 7639

we cannot create an object of interface but we can create a variable of it

1 4742

There are three interfaces A,B & C. A extends B, B extends C, and C extends A.Is it multiple Inheritance? please anybody help me.....

5 8894

abstract class A{ int list []=new int [100]; A(int x,int y){ rondom n=new rondom(); for (int i==;i<100;i++); list [i]=x+r.next int(y-x+1); abstract sort (); abstract binary sarch(int temp); class B extends A{

3 3980

Can we override the main method?

4 6057

make a method which any number and any type of argument and print sum of that arguments.....

1386

can write code for serialization ?

HCL, MegaSoft,

1 3306

What is Yield() method when we r using this ? tell exactly

2 3961

How to print a statement without using semicolan in java

HCL, IBM,

6 10170

Hi friends i want display Triangle shap stars(*) please can tell me any one java code logic? * *** ***** ******* Like this

NIIT, TCS,

2 5222

What is the difference between Java1.4 and Java1.5

NIIT,

1830

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Un-Answered Questions { Core Java }

What do you mean by ordered and sorted in collections in java?

554

What is the difference between inheritance and encapsulation?

597

How do you add an element to a set in java?

497

How to compare strings in java?

507

What is jar?

636

Can a class be private?

520

What is an interface in java?

563

Tell me about different OOPS concepts.

595

Define inheritance with reference to java.

585

What is the implementation of destroy method in java. Is it native or java code?

488

What is the difference between member variables initialization and assignment in a constructor?

667

How many JVMs can run on a single machine and what is the Just-In-Time(JIT) compiler?

582

How do you implement tree mirroring in java?

597

Explain importance of inheritance in java?

607

How does java pattern compile work?

550

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