Cisco Hardware Engineer interview questions

On campus interview. First 20 minutes is behavior interview, discussing with a HR. Second part is also 20 minutes and about technical questions, discussing with a manager. But I mainly talked about my projects and internship experiences on my resume and finally the manager briefly introduced some background of this job (Supply Chain). Unfortunately, it was not quite matched with my study. Later I received a email

screening test involves 2 section, Aptitude test 25 question in 30 min. average level, need to be really fast to solve. test on electronics background, 30 question 40 min. Gate level question, mostly on Digital electronics like circuit, hold time setup time violation, few analog were also their. this followed by 2 round of technical and 1 hr interview. I cleared both technical by answering almost all question and went upto HR, but HR disqualified me. behavior of HR was very rough, I answer all his question well except one. he asked me information about previous company at campus which I refuse to answer as per secrete policy of collage, so he disqualified me.