In service side testing we focus on following -
1. in web application response and request combination is properly or not.
2. Data is updating or adding properly or not. (Connection between interface and database)
3. Connection speed we can check.
Thanks
Hitesh
Server can be validated in different ways, depends upon the scope and cases.
File systems can verfied and changes to configurations made to RPM's for new deployment.
There are certain cases where the fucntionality will be disabled or enabled in such cases the code or the executables files are updated in such way the code still exists in the executables but will be commented when you run the TUNR ON or TURN OF RPM for funcationality and those changes can be verifed by going the system variables assgined for the particualr RPM.
In certain cases the fucntionality will not affect any of the configuration changes but there might be a chances the when process are running there will be problem with the shared memnory or few process which are suppose will kill will not terminated after a user action is over. These can not be verfied by just looking to the GUI.
In most cases there will be a back server running to sync any process which is terminated will be backup by backup server, these things and much more things can be verified.