Interviewing is completely different than in school. When doing Math or Computer homework, you usually are given a clear reason why your grade was marked down.

Interviewing is completely different than in school. When doing Math or Computer homework, you usually are given a clear reason why your grade was marked down. When interviewing for a job, they will never tell you why they rejected you. For legal reasons, it is risky to tell you. They will always give something vague like "not qualified" or "bad cultural fit" or "other applicants were better", even if that isn't the real reason. Also, it's normal to apply to a lot of jobs with a low acceptance rate. If employers interview 20 people for each position, (and they don't select better than random) then you'll get an offer for 5% of your interviews.