I'm second year university student in the United States and I've realized that I have a hard time retaining a lot of the core concepts I've learned in previous semesters.
I'm looking for a software service where I can input the courses I've taken and then I'm quizzed weekly on different topics I've learned in past semesters.
For example, if I input a topic of "digital logic" as a course that I've taken, I might see a question like this:
If A and B are binary numbers, then what is the inverse of
A and B(denoted (A.B)')?
Thanks in advance for any information on the subject.