Oracle Developer interview questions

Got 30 mins phone screen from hiring manager, and asked me some question regarding to background. later on asked me couple of technical question, like algorithm, design pattern. the hiring manager invited me for onsite interview at that moment. but 2 days later. got reject mail from recruiter, really confused.

Was called for interview 13 yrs back . Was asked silly PL/SQ questions. Made a few mistakes about features no one uses. Was asked about why Oracle . Said 'coz its the company whose products I've used the most.