I have the following query, which is identical to the example they give in the documentation:

http://api.stackexchange.com/2.1/questions?fromdate=1391756400&order=desc&site=stackoverflow&sort=activity&tagged=c%2B%2B

This (should) return all of the questions with that tag....but for some reason, in the JSON data, I only get the first 30. Is there a reason for this? Since I'm not explicitly specifying page size?