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,

2116

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

Axcend,

1 3930

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

Axcend,

1 3840

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

CTS, TCS,

6 11166

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

2 9261

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

Cognizant,

2 7949

why java does not have operator overloading?

2 5829

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

3 5692

What is diffrance between FINALIZE() & FINALLY ?

Infosys,

2 5219

how we can write the string concatenation program in java.

3 6891

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

4 6256

is set interface synchronized by default???

Manhattan,

2 7829

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 4945

who can i handle multiple client in RMI

1888

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

2 4971

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Un-Answered Questions { Core Java }

How we can make copy of a java object?

1098

What is append in java?

1159

What do you understand by weak reference?

1006

What is a values collection view ?

1081

Is there a jre for java 11?

1075

What does super keyword do?

1071

Is there any limitation of using inheritance?

1063

How is string immutable in java?

1030

What is the difference between array list and vector in java?

935

What does sprintf mean?

944

what is an objects lock and which objects have locks? : Java thread

1017

What does sizeof return?

983

Difference between default and protected access specifiers?

1117

Can we define constructor in inner class?

998

What is increment in java?

960

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