Java J2EE Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java (6529)
Advanced Java (552)
Swing (223)
EJB (402)

Servlets (804)
Struts (701)
JDBC (771)
JMS (324)

SunOne (10)
J2EE (485)
Weblogic (694)
Websphere (573)

Java J2EE Interview Questions

Questions Answers Views Company eMail

Hi friends, In JDBC 4 drivers are there among this which driver is best and why it is best.Which driver is most commonly used in web applications.

6 9823

Hi Friends, am new to struts.I read that " you can store variables in xml file(properties file) and for future enhancements we just call properties file . Now i want to implement this , where can i call properties file to enhance my application. My question is where this properties file will be called.

1 3705

Hi Friends, can u give me Real Time example for interface and abstract class.(With Banking Example)

4 15058

In DAO we are writting sql queries , how it is possible with creating and closing database connections.

1 2005

when to use ArrayList and when to use HashMap in webApplication.

2 4854

what is the diffrence between weblogic server 8.x/9.x/10.x?

HCL, TCS,

7 37578

Difference between Weblogic server and websphere server?

IBM,

1 9546

what is main difference between architecture,framework and design pattren

3 16083

Hi Friends, can you explain instance in java. In general instance means "occurence of something" . In java what is instance.

4 6308

Hi Friends, I am beginner in java. what i know about synchonized keyword is,If more that one 1 thread tries to access a particular resource we can lock the method using synchronized keyword. Then after that how the lock is released and how next thread access that.Please explain with example.

5 6591

Hi Friends, can you give difference between extending thread class and implementing runnable interface.

4 6818

what is an object class?Explain its methods?

6 12188

Hi Friends, I am new to java. Can u explain about thread concept.How i know one thread is locked, and how can i force or acquire another thread for lock . Finally how to know thread is released from lock. Explain types of lock(like method level and block level) in thread.

1 3797

I have a sorting issue with a Hashmap. My constraint is that I MUST use the Hashmap and work with existing code. I do a database query and place the results in a Hashmap. When I iterate thru the Hashmap, it loses the original alphabetical sorting done by the database. So, my problem is that I must sort the results coming out of the Hashmap which is then placed into another class.

1 4692

What is Session and cookies?Explain in detail with an example?

Accenture, CTS,

4 19450

Un-Answered Questions { Java J2EE }

Can we return resultset in java?

988

Write a program to find the whether a number is an Armstrong number or not?

1095

What are the differences between heap and stack memory in java?

1128

What are the contents on web.xml in struts application ?

1058

What is the difference between equals() and == in java?

1032

Realized?

2257

What is java string pool?

1076

How to create a base64 decoder in java8?

1131

How to sort array in descending order in java?

987

Hi frnds how to lock an user when he enter wrong credentials more than 3 time using java or j2ee tech take username and password in a bean no need to connect DB and validate give me some sample application code or links its urgent for me thanks in advance

2415

explain different ways of using thread? : Java thread

1079

Hi frnd can i any one kindly can post for me portlet,hibernate and spring example application and with flow explantion configuration using Jdeveloper.and related links ar tutorials kindly please send me .its urgent for me .thanks in advance...........else can any one send to kondaiah.goddeti@gmail.com

2259

What is action chaining ?

1160

What is a constructor overloading in java?

1122

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136

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