was interview questions / IBM WAS interview Questions Part 3 - Middleware News
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1.WHAT IS TRACING?
Tracing is when you go through an entire program and record the value of variables and the output. You trace a program when you want to find out what actually went wrong
2.WHERE TO GIVE APPLICATION PRIORITY WHILE STARTING SERVER?
it will be under Enterprise applications ->app name -> startup behaviour ->Startup order in the admin console
3.HOW TO MOVE CODE DEV ENVIRONMENT TO TESTING ENVIRONMENT?
I’m sure what they mean by code here. I think, incase of applications, export them from in DEC and deploy in TEST.
4.WHAT IS SSL?WHEN IT ENCRYPT & DECRYPT THE DATA?
SSL are digital signed certificates. user for meesage/communication integrity and confidentiality. Generally encrypt at Sender side and decrypt at receiver side
5.WHAT IS INCIDENT MANAGEMENT?
It is part of ITIL process….. simple explanation is, when there is a problem in ur WAS environment, which procedure do you follow.
6.WHEN APPLICATION IS DOWN WHAT U WILL DO?
First look at the logs for errors. If you find the error, save the logs and start ur application. Then start trouble shoot.
If no error found, run a trace and look for FFDC etc..
7.I HAVE 16GB RAM,WHAT IS THE MINIMUM & MAXIMUM HEAPSIZE ?
No relation. Heap settings should be made depends on application
8.HOW TO OPEN ADMIN CONSOLE IN AIX/UNIX & WHAT IS THE DEFAULT FILE SYSTEM OF AIX?
admin console can be viewed from remote machine which has a browser, if not behind firewall.
9.WHAT IS FILE DESCRIPTORS IN AIX?
A file descriptor is a handle created by a process when a file is opened. There is a limit to the amount of file descriptors per process.If the file descriptor limit is exceeded for a process, you may see the following errors:”Too Many Open Files”
10.HOW TO RESOLVE PORT CONFLICTS IN PRODUCTION ENVIRONMENT?
check why there is port conflict
run updateports script in WAS
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1) What is the default user registry, if you enable Global Security at the time of installation
Its federated repositories…. actually it is a file
2) Which commands require username/password , if you enable admin security
all stop* , syncNode, addNode(?)
3) When can you enable global security?
- while installing
- After installation also
4) Does enabling admin security needs j2ee security to be enabled?
No
5) Does enabling admin security enables j2ee security?
yes
6) What is the most important step to do, if you change your user repository.
recycle all the JVMs. otherwise the key tokens will not be updated for the new repo
7) who can change admin security settings?
Adminstrator
8) what is the tool supplied by IBM for SSL management in Websphere
ikeyman
9) How do you change the cell wide SSL?
10) how do you replace the default plugin-key.kdb file with new kdb file?
11) can we use diffrent SSL for nodes and plugin ?
Yes
=======================================================
1.WHAT IS TRACING?
Tracing is when you go through an entire program and record the value of variables and the output. You trace a program when you want to find out what actually went wrong
2.WHERE TO GIVE APPLICATION PRIORITY WHILE STARTING SERVER?
it will be under Enterprise applications ->app name -> startup behaviour ->Startup order in the admin console
3.HOW TO MOVE CODE DEV ENVIRONMENT TO TESTING ENVIRONMENT?
I’m sure what they mean by code here. I think, incase of applications, export them from in DEC and deploy in TEST.
4.WHAT IS SSL?WHEN IT ENCRYPT & DECRYPT THE DATA?
SSL are digital signed certificates. user for meesage/communication integrity and confidentiality. Generally encrypt at Sender side and decrypt at receiver side
5.WHAT IS INCIDENT MANAGEMENT?
It is part of ITIL process….. simple explanation is, when there is a problem in ur WAS environment, which procedure do you follow.
6.WHEN APPLICATION IS DOWN WHAT U WILL DO?
First look at the logs for errors. If you find the error, save the logs and start ur application. Then start trouble shoot.
If no error found, run a trace and look for FFDC etc..
7.I HAVE 16GB RAM,WHAT IS THE MINIMUM & MAXIMUM HEAPSIZE ?
No relation. Heap settings should be made depends on application
8.HOW TO OPEN ADMIN CONSOLE IN AIX/UNIX & WHAT IS THE DEFAULT FILE SYSTEM OF AIX?
admin console can be viewed from remote machine which has a browser, if not behind firewall.
9.WHAT IS FILE DESCRIPTORS IN AIX?
A file descriptor is a handle created by a process when a file is opened. There is a limit to the amount of file descriptors per process.If the file descriptor limit is exceeded for a process, you may see the following errors:”Too Many Open Files”
10.HOW TO RESOLVE PORT CONFLICTS IN PRODUCTION ENVIRONMENT?
check why there is port conflict
run updateports script in WAS
====================================================
1) What is the default user registry, if you enable Global Security at the time of installation
Its federated repositories…. actually it is a file
2) Which commands require username/password , if you enable admin security
all stop* , syncNode, addNode(?)
3) When can you enable global security?
- while installing
- After installation also
4) Does enabling admin security needs j2ee security to be enabled?
No
5) Does enabling admin security enables j2ee security?
yes
6) What is the most important step to do, if you change your user repository.
recycle all the JVMs. otherwise the key tokens will not be updated for the new repo
7) who can change admin security settings?
Adminstrator
8) what is the tool supplied by IBM for SSL management in Websphere
ikeyman
9) How do you change the cell wide SSL?
10) how do you replace the default plugin-key.kdb file with new kdb file?
11) can we use diffrent SSL for nodes and plugin ?
Yes
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