regarding mercurial document

[Neeraj Rawat]

hello sir

i am neeraj rawat from india. pursuing Masters from IIT Delhi India.
i am working on mercurial like project in my institute.

it would be very generous of you if you could tell provide document on
mercurial.
so that i could know how it( a distributed central version system)

1. How mercurial ensure that concurrent versions do not cause a problem.
2. How does Mercurial merge different versions?
3. How does Mercurial ensure consistency by mostly using fast local
transactions?
4. How does Mercurial commit a file?
5. How does it achieve fault tolerance against various kinds of faults?


hoping for a positive response from you sir

regards
-- 
Neeraj Rawat