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 7329

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

1 9870

how to make hashmap object as synchronized object?

BOB Technologies,

2 5496

how to execute main()

Symphony, TCS,

4 8071

can we overload main method?

TCS,

8 9510

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

1 5474

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 10491

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 5017

Can we override the main method?

4 7445

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

1754

can write code for serialization ?

HCL, MegaSoft,

1 4038

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

2 4758

How to print a statement without using semicolan in java

HCL, IBM,

6 11803

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

NIIT, TCS,

2 6162

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

NIIT,

2264

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Un-Answered Questions { Core Java }

Can list have duplicates in java?

870

What was java originally called?

910

What about main thread in java?

1069

Is 0 true or false in java?

954

How do I convert a numeric ip address like 192.18.97.39 into a hostname like java.sun.com?

972

What is the latest java version?

1017

What is a literal coding?

974

What is hashing in java?

988

What is string [] java?

913

In case of inheritance what is the execution order of constructor and destructor?

1064

What is equlas() and hashcode() contract in java? Where does it used?

1062

What are the topics in advance java?

919

Explain the difference between runnable and callable interface in java?

1005

What is concurrent hashmap and its features?

1028

What are the differences between heap and stack memory in java?

1004

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