Weblogic Interview Questions

IBM Interview questions

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How to create weblogic domains using jython scripts and configuration wizard?

ssl certificate generation and installation?

how to generate selfsigned certificates and trusted certificates?

What is the difference b/w one way ssl and two way ssl certificates?

apache installation and integration with weblogic server?

where will you copy the modules into apache server?

What is auto deployement in weblogic?

How many types of deployment modes available in weblogic? What is the difference b/w staging and nostaging mode?

What is the difference between unicast and multicast messaging modes in cluster?

In unicast how does group leaders comunicate?

How do you achieve cluster session replication?

How to configure multipool in weblogic?

What is the deployment order? How to set the deployment order?

How to find out memory leaks?

How many types of garbage collection are there? What happens if major collection is not happening?

How do you enable garbage collection logs? Which command is used to generate garbage collection?

How to generate heap dump in weblogic? Explain the command?

Will the heap dump be generated automatically when we get an out of memory error? If yes, Which flag do you use to generate the heapdump automatically?

What is the difference between server hang and crash?

What is the difference b/w core dump and heap dump?

How to generate core dump?

How do you take thread dump in weblogic?

How to write a wlst script for deployment?

how to troubleshoot jdbc and jms issues?

Where the weblogic cache will be stored after the deployment?

How to configure foreign JMS servers?

What is jms bridge and why do we use it?

how to check list of available port numbers?

how to check running servers in linux?

What is the command to find out the operating system version?

How do you install patches in weblogic?

How to schedule the job in crontab? and what are the parametes do you use to set a job?

what is "at" command in unix?

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                NTTDATA Interview questions

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1) Introduction to you self?

2)During deployment u can face memory issue how can u handle?

3)About garbage collection and its algorithems?

4)about session replication, types, configuration?

5)Entire about ssl, types, certificate genaration, an its configuration in admin console?

6) about Thread dump, how to take thread dump, how to analyze, how many types threads?

7)about heap dump?

8)about "Wily introscope " real time tool?

9) about shell scripting ?

10) top command?

11)about MQ, how many types of queues, trobleshooting of mq?

12)jms server, subdeployement, connection factory, trobleshooting of jms issues?

13)work manager, request classess, thread constrains, diff between thread constrains and Execute queue?

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                Mindtree Interview questions

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Differences b/w different versions of weblogic server

Explain about your current environment

Difference b/w webserver and application server

Difference b/w developmode and production mode

jdk version for weblogic 11g

how to recover administrator password if boot.properties got currupted

stubs in cluster

http session replication

t3 protocal

msi mode in weblogic

apache installation

how to enable modules

virtual hosting in apache

what is the difference b/w jndi and jdbc

how to do connection pool shrink

what is the differenc b/w server crash and hang

how many log levels available

what is the difference b/w execute Queues and work managers

how to find out the memory leaks in the application

how to take thread dump and heap dump and explain the jmap command

how to find ip address?

how to find port numbers?

find command

top command

touch command

how to trouble shoot wlst python script issues

how to set deployment order

how dns resolve the client request

vmstat

swap

iostat

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                TCS Interview questions

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1)what is persistent store?

2)difference b/w weblogic 8 & 10?

3)difference b/w Queue and Topic?

4)what is permSize?

5)how to increase the heap size?

6)what is subdeployement ? use of subdeployement?

7)how to deploy an application using wlst script?

8)type of deployement mode?

9)how to clear the weblogic cache?

10)how to check the memory & CPU usage?

11)how to check the disk usage?

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                CSC Interview questions

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1) What is weblogic domain?

2) What are the basic requirements for cluster?

3) What are the benifits/advantages of clustering?

3) How does cluster work?

4) Explain cluster algorithms

5) What is the session replication? How does it work when the failover situation?

6) What is primary and secondary replication groups?

7) What is persistance store? How many types of persistance mechanisms are there?

8) HOw can we achive load balancing for cluster?

9) What is the diff b/w data source and multidata source?

10) What are the diff types of multidata source algorithms available? and explain?

11) HOw does apache know whether the weblogic server is failed state in cluster?

12) HOw to handle stuck thread issues in weblogic?

13) HOw to handle memory issue in weblogic?

14) Explain the steps for creating jms setup?

15) Why dont we target jms server to cluster? and why we target data source to cluster?

16) what is subdeployment in weblogic?

17) What is the diff b/w queue and topic?

18) what is the diff b/w queue and distributed queue?

19) How to configure external security LDAP?

20) HOw to configure siteminder ? What is SSO (single sign on )?

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                TechMahendra Interview questions

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1.roles and responsibilities

2.how to ceate domain

3.jms configurations

4.what is connection factory

5.what is jms module

6.jvm out of memory issues

7.what is garbage collector

8.how to configure datasorce

9. work manager

10.wlst

11.ticketing tool

12.msi mode

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                HCL Interview questions

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First Round ( Technical )

1) How do you create weblogic domain

2) What is the purpose of node manager

3) How do you create cluster? Pre-requisites for cluster creation?

4) What is the process for connecting to the data base from the application?

5) What is JNDI?

6) How to test the connection pool from console?

7) What should be running from the DB side to connect to the data base?

8) What is the differences b/w unicast and multi cast?

9) Do you have exp in performance tunning? How do you handle stuck thread issues?

10) What  are the different thread states?

11) Explain how to handle memory issue? What are the types of memory leaks?

12) How do you check all the running java processes in unix?

13) How do you check updated log file?

14) What is ulimit command in unix?

15) Steps for creating data source and connection pool from the console?

16) How to  trouble shoot the deployment issues?

17) Application deployed it in weblogic and weblogic is down, The requesting is comming from apache and apache is running.

      Will you be able to access the static content when weblogic is down?

13.deployment modes? stagemode, nostage, external stage

14.top command - complete analysis of top

15.df - kh

16.find ( how to find the files which are older then 5 days) use -mtime. search for the syntax in google

17.weblogic life cycle

18.log levels

19.weblogic domain structure

20.config file location

21.node manager - how to add the new domain into node manger by editing property files

22.solaris - commands

23.parameters of jvm

24.diff between java heap and perm? and JVM arguments

26.garbage collection algorithms

27.scenarios

28. How to handle stuck thread issues?

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                NESS  Technologies Interview questions

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1) Introduce your-self with current Environment and Work Experience?

2)can you tel me recently faced issues?

3)MQ

          What is transmission queue?

           Remote Queue?

4) currently which version of weblogic using and what are the features ?

5) what is thread dump and how to analyze, you find blocked threads what can u do?

6)application running in weblogic suddenly it will slow what are the possible reasons?

7)what is heap dump, how can you take, and its syntax?

8)what is garbage collection?

9) what is hacking threads in weblogic?

10)how to install apache?

11)what is virtual hosting?

12) what is "keep alive" in ( apache)?

13)what is harizontal clustering, how it works?

14)ssl how will provide security for our application? how to genarate keys tel me everthing process ?

15)how to create datasource?

16)what is "multidatasource"?

17) database connection leak issues, in weblogic? if every thing is fine database side fine, network is fine what is the reason?

18)diff between XA-driver and Non-xA driver?

19)How to release connection from connectionpool?

20)If Jms issues occured, how to troble?

21)find command

22)Tcp, netstat  -anp(what is "a"), ps -ef, awk, cut, what is diff between awk and cut?

23)vi editor

      how to open 10 files at a time in vi editor

24) what is "nodemanager", nodemanager process, port numbrt of node manager?

25)telnet

26)pack, unpack?

27)scp

28)how to create softlink, hard link files in linux?

29)what is the process connecting to the database, if weblogic is not connecting to the database what could be the reason?

30)native momory issues?

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                WIPRO  Technologies Interview questions

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DIFF B/w Jdk 1.5 and 1.6 ?

DIFF B/w apache 2.0 and 2.2 ?

DIFF B/w wls 8 and wls 9 ?

wls installation in gui mode ?

Data source and conection properties ?

how to create Data source ?

patch installation ?

deployment modes ? diff b/w stage and no stage mode ?

cpu utilizaton ?

war , ear , jar files ?

what deployment descriptor ?

what is thread?

Log levels ?

Domain creation ?

Deployments ?

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                Wels Fergo Telephonic Interview Questions

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1.Tell me about yourself and roles and responsibilities in current Project?

2.How to install the servers and configure the domains? Do you use any tools or scripts?

3.Do you have any experience in writing scripts?

4.If there is any issue with script while running, then how do you debbug the script?

5.If i will give a generic jar to install 32-bit of weblogic server, How do you do that?

6.Is JMS server targetting to Cluster?

7.What is the use of having Subdeployments?

8.How can MQ get the message from Weblogic Server?

9.Can you tell the functionality of SSL? How does it work ?

10.What is a domain wise administration port? Do you have any idea?

11. What are the webservers you know? What version of apache you are using?

12.What is the weblogic version you are using?

13.How to display only files using ls command?

14.How can you debbug a shell script?

15.How to print the word hello from a test file?

16.How to remove empty lines from a file?

17.How to print the lines using sed command?