We will be using Piazza for sharing answers to posted questions with the whole class. To sign up, see the 421A Piazza site. It is free and allows you to view past questions from other students, and discuss questions together. Try it first for any homework questions you may have. You are also welcome, of course, to catch us whenever you see us at CCRMA, such as during office hours, etc.
TA weekly office hours will be announced in class and via email to the class. Meetings with JOS are arranged via email for half-hour slots before or after class, or other times when necessary.