Thank you for reply. I don't know what causes the roller-coaster grade. I kind of came up with these conclusion: 1. I sometimes have trouble with understanding the terms from the book. As I said before, I am not familiar with CS terms. The book starts to use these terms while I have no understanding about it.
The class is so loud to the point that I cannot hear what professor says and I ended up with taking test without knowledge.
If I want the "BASIC" understanding from the TA, the TA expected me to know almost everything and I cannot get the answer that I wanted. Also, if I go to office hour, then I ended up waiting for other people because there are only few TAs.
So this is the problem.
I cannot understand what was written on the book -> Ask TA for help -> Either they cannot give the answer that I want or waiting for others to be done -> Do not have understanding for the material -> fail the test -> withdraw
So, as a solution, I am seeking for any wikipedia page or something like that can explain the terms that I don't know with easy explaination that can be read anytime and anywhere. Is there anything like that? (Sorry for bad writing)