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 7441

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

1 9946

how to make hashmap object as synchronized object?

BOB Technologies,

2 5604

how to execute main()

Symphony, TCS,

4 8227

can we overload main method?

TCS,

8 9716

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

1 5537

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 10641

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 5156

Can we override the main method?

4 7570

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

1807

can write code for serialization ?

HCL, MegaSoft,

1 4116

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

2 4861

How to print a statement without using semicolan in java

HCL, IBM,

6 11966

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

NIIT, TCS,

2 6247

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

NIIT,

2300

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Un-Answered Questions { Core Java }

What is entry set in java?

1116

What is re-factoring in software?

1047

What is jit compiler in java?

1095

What is the disadvantage of java?

948

Can static method access instance variables ?

1118

What are the different types of constructor?

980

Name few java.lang classes introduced with java 8 ?

978

How can we make a class virtual?

1106

What is difference between length and length() method in java ?

989

What is passing value java?

1050

What is a numeric literal?

1069

Should database connections be singleton?

954

What is a singleton factory?

954

How to overcome the exception object reference not set to an instance of object?

1139

What is functional interface in java?

1038

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