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 7666

can abstract class have constructor how can you achive this ?

Fidelity,

4 10795

what is difference betwwen hashmap and hashtable ?

Fidelity,

7 12037

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 8140

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

Synechron, TCS,

7 23424

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

1 3305

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

Lampex,

2072

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

Lampex,

2083

how to write a program for chat function using core java

Satyam,

1 5090

why abstract class will have a constructor?

4 8369

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

2094

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

Systematix,

1 4893

basic difference b/w ALL types of JDBC driver.

Systematix,

1 5746

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 5535

what is meaning of JIT?

4 10139

Post New Core Java Questions

Un-Answered Questions { Core Java }

Which class is the superclass of all classes?

1110

How do you make a thread in java?

1104

What is the purpose of assert keyword used in jdk1.4.x?

1067

What is annotation in java?

1058

What is the purpose of the enableevents() method?

1051

What is a percentage sign called?

1128

What is a war file?

1095

What is the full name of java?

1131

How to find the given number is a prime number or not by getting input from the user

1103

What are the types of casting?

1072

Explain differences between collection api and stream api?

1191

Can we extend a class with private constructor?

1016

What is google full form?

1017

What is a local block?

1151

What is "this" keyword in java? Explain

1104

For More Un-Answered { Core Java } Questions Click Here