AMD Entry Level Hardware Engineer interview questions

I applied the job via company website and got the chance to be phone interviewed the same day I applied...... I was in a vacation at that time!!!! Anyway, we set up a time and did an hour interview four days later.... The questions covers all the stuffs from hardware to software. They are not difficult individually, however, it requires you know every aspect of the computer. My answers to those questions are ..... not bad, according to the recruiter. But I do fail some of them. Finally, I cannot get the chance to do a onsite interview. I lose a good opportunity!!!!