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 6048

what is use of threads how many ways to create thread

iTrust, Verizon,

3 10572

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

Huawei,

8 13336

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 4207

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)

2012

What is JAVA? Why it is platform independent?

NIIT,

10 14166

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

2 3983

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

2096

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

NIIT,

1 6807

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 7434

CFG,

8 9064

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

3 5769

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

HSBC,

2 12597

diff. b/w JAVA and javascript...

NIIT,

3 6568

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

3 13659

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Un-Answered Questions { Core Java }

What is the final keyword?

944

Is integer immutable in java?

937

What is the difference between method overriding and overloading?

1182

What is a nonetype?

1061

How would you dynamically allocate memory to an array?

1001

What is get () in java?

981

What is the exact difference in between Unicast and Multicast object?

2054

What are the main uses of the super keyword?

927

explain what is transient variable in java?

1076

How to perform selection sort in java?

963

Explain importance of throws keyword in java?

948

What one should take care of, while serializing the object?

860

What do you know about the garbage collector?

1052

what is session in java?

1188

How many types of threads are there in java?

1000

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