In particular:
"Please describe in as much detail as you think is appropriate what the responsibilities of the Model, View, and Controller are, both in general and in Rails specifically, and what the benefits of this separation are."
and
"A user browses to https://gitlab.com/gitlab-org/gitlab-ce in their browser. Please describe in as much detail as you think is appropriate the lifecycle of this request and what happens in the browser, over the network, on GitLab servers, and in the GitLab Rails application before the request completes"
are answerable by anyone who can google in whatever level of detail one desires, but if you are to actually explain these in detail yourself you will end up wasting quite a bit of time for what's more than likely a canned response.