<p>I took Comp Sci A with a full year course at my school, and it was an extremely easy AP Test. I regret taking Comp Sci A because this year I took AB and barely studied or did any work in my class and still got a 5 on AB as well. I think you can study for AB in one month if you dedicate enough time to it. The AB adds only a few new subjects to the test and none of them provide much of a challenge.</p>