Getting questions that have a specific tag or tags?

Question

In the current API (2.1 and 2.2), how do you get questions that have a specific tag or tags?

EG:

1. All Stack Overflow questions asked in the past 2 months tagged 'ruby'?
2. All Stack Overflow questions asked in the past 2 months tagged 'ruby' and 'git'?
3. All Stack Overflow questions asked in the past 2 months tagged 'ruby' or 'git'?

Answer 1

For questions tagged with all tags in a list (AND operation), use the /questions path.
For example:

/questions#fromdate=2013-01-11&sort=activity&tagged=ruby;git

~~~~~
For questions tagged with any tags in a list (OR operation), use the /search path.
For example:

/search#fromdate=2013-01-11&sort=activity&tagged=ruby;git