Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

write a program to create an vector with string(add,remove) operation.and value should be enter through keyboard.

Axcend,

2058

write a program to create an arraylist and listeterator.and value should be enter through keyboard.

Axcend,

1 3853

write a program to create an vector and listeterator.and value should be enter through keyboard.

Axcend,

1 3728

What will happen if we write code like: try{}catch(exception e)catch(IOException i)

CTS, TCS,

6 10953

How could Java classes direct program messages to the system console, but error messages, say to a file?

2 9144

Is Java Class Threadsafe ????? How to make Java class Thread safe??

Cognizant,

2 7861

why java does not have operator overloading?

2 5707

difference between java ,c#&java,c++

3 5596

What is diffrance between FINALIZE() & FINALLY ?

Infosys,

2 5114

how we can write the string concatenation program in java.

3 6745

give me the answer of this code class A extnds String This code we can write r not in Java? Explain?

4 6083

is set interface synchronized by default???

Manhattan,

2 7744

1.IN CASE OF DYNAMIC METHOD DISPATCH WHY WE USE REFERENCE VARIABLE,WE CAN USE THE DIFFERENT DEFINED OBJECT DIRECTLY TO ACCESS THE DATA MEMBER AND MEMBER FUNCTION OF THAT RESPECTIVE CLASS?WHAT IS THE MAIN FUNCTION OF "REFERENCE VARIABLE" HERE?

TCS,

2 4837

who can i handle multiple client in RMI

1840

what is difference betwenn Access Specifier and Access Modifier ????

2 4873

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Un-Answered Questions { Core Java }

Is empty set an element of empty set?

1036

Is it possible to define a method in java class but provide it’s implementation in the code of another language like c?

991

What sorting algorithm does javascript use?

945

What is extension method in java?

996

What is the simpletimezone class in java programming?

1088

What are encapsulation, inheritance and polymorphism?

957

Is void a data type?

911

What is anonymous inner class?

1031

Why does it take so much time to access an applet having swing components the first time?

1885

What is a function in java?

981

Why inputstreamreader is used in java?

962

What is use of static method?

1002

Can we override the private methods?

947

What is runtime polymorphism or dynamic method dispatch?

976

What are the types of web technologies?

1006

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