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 5946

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

1 9195

how to make hashmap object as synchronized object?

BOB Technologies,

2 4584

how to execute main()

Symphony, TCS,

4 6204

can we overload main method?

TCS,

8 7582

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

1 4708

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 8829

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 3945

Can we override the main method?

4 6002

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

1366

can write code for serialization ?

HCL, MegaSoft,

1 3277

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

2 3935

How to print a statement without using semicolan in java

HCL, IBM,

6 10087

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

NIIT, TCS,

2 5194

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

NIIT,

1817

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Un-Answered Questions { Core Java }

State the merge-sort principle and its time complexity.

561

Tell me a few examples of final classes defined in Java API?

554

What is files manifesting?

1715

Explain the difference between hashmap and hashtable in java?

481

What do you mean by a JVM?

551

How do you declare an array that will hold more than 64KB of data?

631

What are the different types of constructor?

513

What is the console in java?

666

What is string immutability?

532

How do you add an element to an arraylist in java?

476

How transient variable is different from volatile variable?

549

What is a string what operation can be performed out with the help of a string?

500

How variables are declared?

509

what is singleton in java?

588

How java is similar to c?

579

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