COMP1011 Computing 1A is no longer offered. If you haven't done it yet and your program says you should do it, you should do COMP1911 instead. See this page for more details. Much of the material in COMP1011 has been moved to ENGG1000 and students who have not completed COMP1011 would benefit from that course.
The home page from the last time COMP1011 was run is available here.