What is CONFIGURATION MANGAGEMENT TOOL,How it used for a developer and a Tester?

Answer 1

When multiple people work on the same project its hard to trace the changes to source code.

Thats where CMS comes in. Configuration Management System.

The most used are VSS and Starteam.

Visual Source safe would save versions of the file with the time stamp and user details who have accessed the file.

If you still need help you can get back to me. :)