"How many points did you get on the test?"
Translation:시험에서 몇 점을 받았습니까?
점 is the just the general word for points and could also mean things such as dots, spot, or your point when you ate talking about something.
점수 on the other hand is the word for "score" and refers specifically to the number representing someones performance in something such as a game or a test.
In conclusion, you must get a lot of 점 in order to get a good 점수.