Other turn-offs: 1. Pull out an inconsequential suboptimally worded sentence in my CV and ask questions about it while wearing a half-smirk. 2. React negative

Other turn-offs: 1. Pull out an inconsequential suboptimally worded sentence in my CV and ask questions about it while wearing a half-smirk. 2. React negatively to anything about my CV or manner that is considered general practice among other interviewers. Is it silly and unnecessary of me attach a cover letter as PDF? Of course it is, but some companies' HR screenings require it, and I don't know your company's screening process.