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Websphere Interview Questions

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What is the difference between base distinguished name and bind distinguished name ?

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

Answered by: Ravikiran on: Jul 25th, 2014

Bind Distinguished : it means these are the credentials to login to the LDAP server.

Base distinguished: it is a directory, where the search has to start

Answered by: Madhu on: May 21st, 2014

Base distinguished name which indicates the authentication of users and bind distinguished and bind password which indicates the authorization of users...

What is reap timeout in websphere

Asked By: kirankumar samudrala | Asked On: Apr 15th, 2011

Answered by: ramesh on: Jul 18th, 2014

180seconds

Default session timeout value in websphere 7

Asked By: kannanv | Asked On: Jan 30th, 2014

Answered by: ramesh on: Jul 18th, 2014

60 seconds

Answered by: Ritam Bose on: Mar 12th, 2014

30 min

How to check the status of database in websphere ?

Asked By: kirankumar samudrala | Asked On: Apr 15th, 2011

Answered by: Tirupathi on: Jul 9th, 2014

We can check two ways through commands:
1. ps -ef|grep db (Linux)
2./usr/ucb/ps -auxww|grep db (Solaris)

or

telnet (as per mentioned db details in the database)

What is the use of class loaders ?

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

Answered by: Praveen on: Jul 6th, 2014

It is used to load Third party classes other than IBM WAS classes and application classes.

What are the difference between Java 2 security and j@ee security ?

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

Answered by: praveen on: Jul 6th, 2014

Database , authentication

What information is available in plugin cfg.XML file ?

Asked By: kirankumar samudrala | Asked On: Apr 15th, 2011

Answered by: amar on: Jul 4th, 2014

Plugin.cfg.xml file contains detail information about the application server

Answered by: KRISHNA on: Jun 20th, 2014

Plugin.config.xml contains the below information ...

1) Server configuration,

2) Cluster configuration,

3) Server weights,

4) Application virtual host.

What is the difference between connection pool data source and xa data source in websphere ?

Asked By: kirankumar samudrala | Asked On: Apr 15th, 2011

Answered by: Krishna on: Jun 20th, 2014

Xa data source : Example : We have two accounts with different databases In such a case we want to transfer the funds to one account to another account Then we go for Xa data source. Connection po...

How can we send 100 requests to server 1 and 50 requests to server 2 and 40 requests to server 3 ?

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

Answered by: KRISHNA on: Jun 20th, 2014

At the time of adding these three servers to the cluster we should give weights like in the fallowing

Servere1......100

server2.......50

server3.....40

So we can now.....

What is the importamt config file located in ihs http server and where it is located ?

Asked By: kirankumar samudrala | Asked On: Apr 15th, 2011

Answered by: Madhu on: May 21st, 2014

Important file is: httpd.conf

Code
  1. Path:-/opt/IBM/HTTPServer/conf

What is difference between JDBC providers and data source in websphere ?

Asked By: kirankumar samudrala | Asked On: Apr 15th, 2011

Answered by: anilkumar.leeds on: May 18th, 2014

Steps for connecting to the database using JDBC:- #1 Using Driver Manager:- a.Load the driver class using class.forName(driverclass) and class.forName() loads the driver class and passes th...

What is session sffinity ?

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

Answered by: Madhu on: May 14th, 2014

Subsequent request send to the same server

Answered by: Ragapriya Sukumaran on: Feb 21st, 2013

Session affinity is routing the concurrent requests from same client to the same server.

How can we calculate the hit count for the web server?

Asked By: VikasKapil | Asked On: May 15th, 2013

Answered by: Madhu on: May 14th, 2014

Code
  1. cat /opt/IBM/HTTPServer/logs/access_log_`date +%Y-%m-%d`  | wc –l

Answered by: Prasad on: Jul 11th, 2013

Netstat -an | grep | wc -l

replace, with your actual webserver port number.

Find http server version

Asked By: kirankumar samudrala | Asked On: Apr 15th, 2011

What are the different ways to find http server version

Answered by: Dheeraj on: Apr 28th, 2014

Or
use ./versionInfor.sh in /HTTPServer/bin/

Answered by: srini on: Apr 24th, 2014

Go to the installation directory of the Web server.
go to Httpserver/bin execute the command

windows : apache.exe -V

Linux : ./httpd -v

aix/solaris : ./apachectl -v

How many JVMs will there for each server ?

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

Answered by: deeru on: Apr 28th, 2014

When a server is started two JVMs get started they are

1. jvm which handles all the xml files ex:server.xml,secuity.xml,coregroup.xml,server-index.xml,etc
2. to handle configurations such as LDAP gouble security,plugin,session,tivoli, etc.

Answered by: Preetham R Enjamuri on: Jan 17th, 2012

It depends on the environment. There can be any number no limit. Generally in Producation a JVM is put in two servers clustered horizontally to avoid single point of failure (SPOF)

What is session failover ?

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

Answered by: deeru on: Apr 28th, 2014

Error connection to the Data base session fail over occures.
or
Session timeout is >30 sec
or
Maximum in-memory session count is less
or

What is pmi ?What is the use of pmi ?

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

Answered by: deeru on: Apr 28th, 2014

PMI -Performance monitoring Interface IBM web sphere uses a tivoli monitoring interface to monitor the application servers and nodeagent Monitoring and Tuning->Performance Monitoring Infrastructure ...

Answered by: Suresh B on: Jan 17th, 2012

The PMI in websphere 6.1 only enables to access the metrics data only after server startup . • Is there any way to monitor the PMI stats during server startup other than creating a custom MBean. ...

What are the per-requisites of was installation ?

Asked By: kannanv | Asked On: Jan 30th, 2014

Answered by: Dheeraj on: Apr 24th, 2014

A machine with Linux or Windows os with at least 1GB ram, 50GB disk space and supporting software putty and xming.

How can you check if your httpserver(or)web server is running or not?

Asked By: kirankumar samudrala | Asked On: Apr 15th, 2011

Answered by: sathish kumar on: Apr 8th, 2014

Netstat -antp| grep httpd

Answered by: Srini on: Apr 1st, 2014

Command-line alternatives (Windows) Stop HTTP Server service net stop "IBM HTTP Server 7.0" Stop HTTP Administration Server service net stop "IBM HTTP Administration 7.0" Start HTTP Server service net...

Memory exception

Asked By: kirankumar samudrala | Asked On: Apr 16th, 2011

What is the reason for out of memory exception ?

Answered by: sathish kumar on: Apr 8th, 2014

1) Less heap memory
2) Less connection pool size
3) Less Thread pool size
4) Long living objects

Answered by: Madhu on: Mar 24th, 2014

We don't have sufficient heap size in this case we need to increase the heap size or we need to restart the JVM

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