I'm 22 and landed my first interview with Deloitte for a decent role. I cleared the aptitude test, HR round and the Group Discussion round only to get rejected in the final round for not being able to answer just one question.

I feel really dejected. I have already heard the whole move on, you'll get many chances jargon. I am a very competitive person who is extremely result oriented, so when I do not get desired results, I feel extremely sad. The part that makes me more sad about this interview is that people who had lower scores and practical knowledge than me got in.

I don't feel worthy enough. Plus the feeling that I failed my very first interview is killing me. Anyone who has been through such a situation, can you help me out here?

Edit 1: I forgot to mention that I am prepping for GRE and landing a good grad school is my primary motive but the interview rejection makes me feel unworthy and very demotivated even towards GRE.