You may use our Piazza Class Forum to ask questions of both the course staff and your classmates. Please use Piazza for all out-of-class questions to instructors, unless it is something of a very private nature (medical and such). Others can likely benefit from the answer to your question, as long as it is related to the class.

Also, if you need to brush up on your systems programming skills, take a look at these recorded lectures from CS361 Computer Systems Programming.