I personally think there are 4 categories of people:
1) The super smart/geniuses (whether they put in lots of hard work and know the content well or are just naturally smart (many arguments on whether effort and time are essential to being smart, but that's not relevant rn)) that finish the test with like half the time left/lots of time left
2) Those who try to speed through the test and go back to check, where they make dozen of mistakes (not always true) (careless (mistakes) or not), and because they have lots of time left they can go back and check but that doesn't mean they will always find every mistake
3) Those who pace themselves, and dedicate a suitable amount of time to each question, whether it be distributed according to the difficulty, the marks for the question, or even both
4) Dropkick/Don't know anything, these people do what they know, and skip what they don't (As in they won't put effort into figuring out something properly if it requires too much thinking or analysing). If they believe that tests are important, they will spend the rest of the time trying to get as many marks as possible, if not, they will either sit there waiting till the test finishes or if they are given the ability to, they leave the exam room.