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,

2122

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

Axcend,

1 3942

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

Axcend,

1 3868

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

CTS, TCS,

6 11191

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

2 9277

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

Cognizant,

2 7957

why java does not have operator overloading?

2 5843

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

3 5711

What is diffrance between FINALIZE() & FINALLY ?

Infosys,

2 5239

how we can write the string concatenation program in java.

3 6916

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

4 6289

is set interface synchronized by default???

Manhattan,

2 7857

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 4955

who can i handle multiple client in RMI

1898

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

2 4989

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Un-Answered Questions { Core Java }

Explain the difference between throw and throws in java?

1003

What is a map in java?

989

How many types of parsers are there?

1019

Why java is call by value?

1032

Can you use this() and super() both in a constructor?

987

Why runnable interface is used in java?

1136

What are thread local variables?

1152

Can you have two constructors in java?

988

What is java util?

1025

Which sorting algorithm is best in java?

983

Why collection is called framework in java?

991

What are meta-annotations?

993

What is a nested structure?

1042

Explain treeset?

1113

What is hash table in java?

1023

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