<p>Depends on the course. CS and Math are borderline impossible. Only exception is if you’re a graduating senior who needs it for their major. Classics and Spanish, otoh, are pretty easy. </p>
<p>Sign up time is a mixture of how many credits you have and a randomness algorithm iirc. </p>
<p>You should be able to get into CS170 and 171. Any higher, not as a sophomore. </p>
<p>Just plan it well. Courses shuffle all time time. So even if it’s closed initially, it might be open during add/drop/swap. </p>