Amazon Tech Ops Associate interview questions

The first round was online written test of 30 questions . The time was 15 minutes. The test was based on speech and language so all questions are on english speech and some grammar. There are lots of candidates for the interview so the competition was very high, like if you have scored 30 out of 30 then only you will be shortlisted for the next round.

First round had aptitude questions. We were expected to write sql queries for given table and requirements. Linux basic commands were asked. Why do we use certain commands and pattern matching questions were asked