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

Core Java Interview Questions

Questions Answers Views Company eMail

if i have one string class then how can you achive this class functionality of this class?

Fidelity, iFlex,

3 7527

can abstract class have constructor how can you achive this ?

Fidelity,

4 10658

what is difference betwwen hashmap and hashtable ?

Fidelity,

7 11779

we know that every java prog must follows OOPS Principles. Anybody can answer, HOW THE FOLLOWING PROGRAM FOLLOWS OOPS CONCEPTS i.e, Inheritance,Polymarphism,Encapsulation? class a{ public static void main(String args[]){ System.out.println("Hello World"); } }

3 8009

is memory to the abstract class allocated ..or objects not instantiated

Synechron, TCS,

7 23193

where the static methods will live ,on stack ? can you explain brefly

1 3220

how to write a server program and sending the mails to the server using smtp protocol please help me

Lampex,

2021

how to write a program for sending mails between client and server

Lampex,

2038

how to write a program for chat function using core java

Satyam,

1 4991

why abstract class will have a constructor?

4 8210

how to run ecllipse with jettyserver for windows environment using batch file

2024

can we Connect Applet to Data Base ? with Discriptiom. and also What is Diff. from Applet & Servlet?

Systematix,

1 4845

basic difference b/w ALL types of JDBC driver.

Systematix,

1 5658

perpare on factorypattern,linklist wothout using collection, (multitharding ie create producer/customer therad producer create Queue continuesly,consumer consume queue, consumer wait if queue is full,producer wait if queue is empty),diff betn sleep(1000)&wait(1000) these r the main Q ask in huawei(2008)

Huawei,

1 5455

what is meaning of JIT?

4 9971

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Un-Answered Questions { Core Java }

What is the equal sign?

1053

What is difference between classpath and path variables in java?

1157

What is covariant return type?

1077

What happens if we override only equals?

938

How can we make a class singleton?

1031

What is valid keyword in java?

951

How a variable is stored in memory?

938

What is method reference?

944

Can we assign integer value to char in java?

981

which class is the wait() method defined in? : Java thread

914

What is difference between char array and string?

1068

What is meant by tab pans?

1168

What is a class reference?

1050

What are the benefits of java?

1101

Explain an intermediate language?

914

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