Download - WAS interviewquestions
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8/7/2019 WAS interviewquestions
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1. Roles & Responsibilities
2. Explain your work in your previous environment (Your script)
3. What is wsadmin / jacl scripting
o What are the different wsadmin objects.
o How do you invoke wsadmin command
o How do you execute a jacl script
o What did you use wsadmin / jacl scripting for.
4. Explain
o Session affinity
o Session Persistance
o Sessiontracking
o How do you set session time out.
o What are the different levels at which session timeout can be set
5. How do you upgrade WAS
o GUI Upgrade
o Silent Upgrade
o Logs files and their paths for both
6. Back Ups
o How do you take back ups in WAS
o What is the out put file
o How do you restore back ups
o What is the Backup policy in your previous company
7. Explain profiles and what is the equivalent command in WAS 5.x
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15. What is ripple start
16. Explain 2 Troubleshooting scenarios
17. How would you set up introscope profiles/probes
18. VerboseGC
o What is verbosegc
o How do set it up
o What files have verbosegc information
o What tool did you use to analyse verbosegc logs
19. What is process definition.
o What is the effect of changing max heap and min heap size of a jvm
o Whats the max heap allowed by AIX
o What are the effects of large initial heap/max heap
20. Heap Dumps/ Core dumps
o What is a heap dump
o What is a core dump/thread dump
o How to generate Heap dump both WAS 5/6
o How to generate core dump/thread dump both WAS 5/6
o Whats the difference between kill -3 command executed on WAS5
JVMs and WAS 6 JVMS
o What tools did you use to analyse core dump/thread dump
o What tools did you use to analyse heap dumps
o In what scenarios is a core dump/thread dump useful
o In what scenarios is a heap dump useful
o What are the respective extensions (jdk 1.3 and 1.4)
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21. How do you make a jvm run as a service in windows and why.
22. What is activity log and how do you view it.
23. How do you set up traces.
24. What is a PMR and explain how you worked with IBM on a PMR
25. What all parameters did you tune in WAS (other than JDBC
connection pool and heap sizes)
26. What other connection pools do you know in WAS other than JDBCconnection pool
27. How do you enable global security in WAS
o How do u configure an LDAP
o How do u configure LTPA
o How do u configure SSO
o What is the limitation of SSO
o How do you make SSO work across multiple cells
o Does WAS support multiple LDAPs?
28. What is SSL
29. Did you ever work with certificates
30. What is the utility that comes with WAS / IHS to manage certificates
31. What is the defualt key store location for WAS
32. How do you change the port number for admin console
o Logging into the admin console
o Without logging into the admin console
33. How do you disable security for Deployment manager without
logging into the console
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34. If you have to change the ports of a jvm manually without
logging into the admin console which file would you edit.
35. Explain virtual hosts concept
o What are the two virtual hosts that come with WAS installation
36. What is the plugin configuration file and where is it located
o How do u regenerate the plugin config file
o When do u regenerate the plugin config file
o When do you manually edit the plugin config file
o What is the information in a plugin config file
o When the request comes to a webserver how does the webserver
know the JVM that is capable of handling that request.
o What is the refresh interval of plugin.
o If a change is made to the plugin config should the webserverbe restarted?
37. What webserver did you work on
o What is the configuration file for IHS
o If changes are made to the config file should the webserver
be restarted
o What changes are made to this config file (automatically)
during plugin installation on the webserver
38. What is collector tool
o Syntax
o Use
o Output file
39. When on a system there is an existing installation of websphere
federated to the DM. You make one more installation and federate this
to another/same DM.
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o Will it work??
o If it doesnt, how will you make it work
40. What is the difference between horizontal/vertical clustering.
o When would you use them
41. When an application is deployed, where can the application
binaries be found
42. Unix commands
43. How do you create a JDBC resource
44. What is the difference between webserver handling in WAS 5 and 6
45. New features in WAS 6
46. What is the pre requisite for syncnode command
47. What are the logs in IHS
48. How do you change the log format in IHS
49. What are the configuration files in IPlanet web server
50. What is TAI, and how do you enable it.