⟩ What is CVS? List some useful CVS commands?
CVS is Concurrent Version System. It is the front end to the RCS revision control system which extends the notion of revision control from a collection of files in a single directory to a hierarchical collection of directories consisting of revision controlled files. These directories and files can be combined together to form a software release.
There are some useful commands that are being used very often. They are
► cvs checkout
► cvs update
► cvs add
► cvs remove
► cvs commit