Re: differ between module testing and system testing
Aparna - I suggest that you start taking advantage of sites such as Google where you can search and find definitions.
One site that supplies some good definitions is www.wikipedia.com - there are quite a few others.
Based on the threads that you have opened also go to the Newbies forum on this site there is a lot of good basic info in there and get yourself some basic books on testing to read and start accumulating knowledge.
I have not failed. I've just found 10,000 ways that won't work" --Thomas Edison