Is there a way to see all the closed or deleted questions both in the main and the meta? I searched the meta to see if the same(or similar) question was asked before, but I couldn't find it. If the answer is well-known, my apology is in order.
There are lists (on the meta and the main, separately) which you can access if you have 10k points or more, through
review and then clicking
tools and choosing the appropriate tab. These lists, however, do not include everything, they are limited in both time range and length.
The lists go only as far as 30 days the most. On the main site, however, due to high traffic of deletions (mostly by the Community clean up procedure) the list will often only include things from the past two-three days or so.
Beyond that you have to rely on your bookmarks, lists that you have saved elsewhere, favorites (you can view deleted favorites), and your browsing history.
As for closed questions, you can search for
is:q closed:yes in the search box, and find all the closed questions. Currently there are over 10,000 of them. So additional parameters may be helpful.