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,

2062

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

Axcend,

1 3861

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

Axcend,

1 3740

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

CTS, TCS,

6 10985

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

2 9160

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

Cognizant,

2 7864

why java does not have operator overloading?

2 5720

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

3 5602

What is diffrance between FINALIZE() & FINALLY ?

Infosys,

2 5132

how we can write the string concatenation program in java.

3 6764

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

4 6105

is set interface synchronized by default???

Manhattan,

2 7753

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 4857

who can i handle multiple client in RMI

1848

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

2 4891

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Un-Answered Questions { Core Java }

How many bits is a string?

958

Is binary a low level language?

880

How the interruptible method gets implemented?

928

How infinite loop is declared?

979

What methods are used in Servlet?Applet communication?

2194

What is difference between iterator access and index access?

1021

How does arrays sort work in java?

972

What is the static variable?

1080

What are white spaces in java?

996

What is the implementation of destroy method in java. Is it native or java code?

914

What mechanism does java use for memory management?

938

Is java free for commercial?

878

Why for each loop is used?

973

Write a method to check if input string is palindrome?

979

What is wrapper class example?

951

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