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 use of marker interface? give me good example?

2 6312

what is use of threads how many ways to create thread

iTrust, Verizon,

3 10884

Program to print 1 1 2 1 2 3 1 2 3 4 like that

Huawei,

8 13785

program to find 25 square = 625 here the 625 of last two digits is equal to 25, i don't know excatly what this type of number is called

Huawei,

1 4386

i need to know the website that i can compile and run a java code in online.(while system doesn't contain any jdk and jre)

2125

What is JAVA? Why it is platform independent?

NIIT,

10 14827

i need to know the site which compiles and run the java program completely in online... thank you for your reply in advance

2 4172

what questions are been asked ??? for interview in apti

2215

Features of JAVA ? In which version of java synchronizedXXX() methods are included in Collections class.

NIIT,

1 7000

all are saying java doesn't support multiple inheritance but by default Object class is super class for all the user defined classes and we can extend atmost one class so each class can extend more than one class so java supports multiple inheritance?i am confused with this,pls any one explain me.

4 7772

CFG,

8 9619

what is class.forname() and how it will be useful ?

3 6040

how and when compiler knows that the Java code throws the checked Exception.

HSBC,

2 12857

diff. b/w JAVA and javascript...

NIIT,

3 6826

what is the difference between String s="hello"; and String s=new String("hello");?

3 13886

Post New Core Java Questions

Un-Answered Questions { Core Java }

What is broken and continue statement?

1066

How to change the priority of thread or how to set priority of thread?

1078

What is == in java?

1075

What is the purpose of file class?

1093

What is implicit object in java?

1131

What are recursive functions? Give some examples?

1255

Is singleton class immutable?

1020

How can we access some class in another class in java?

1057

What is a bufferedreader?

1168

Write an algorithm program in java for the following question.. 1) S is a set of integers.X is an integer obtained by sum of two digits in S. Write logic for whether or not the X is from the S. The time of algorithm should not exceed o(n logn).

2238

How many types of threads are there in java?

1119

Add a value x to array from index l to r where 0 <= l <= r <= n-1

1140

What is java life cycle?

1048

Is void a return type?

1021

Why main method is called first in java?

1061

For More Un-Answered { Core Java } Questions Click Here