NTT DATA Linux Systems Administration interview questions

Resume shortlist followed by online Technical Round. First person joined 5 minutes late and simply asked me wait as he is busy in another meeting. Returned after 2-3 minutes, neither switched on his camera nor he introduced himself which I found very unprofessional. Straight forward technical interview questions 1 after another. Hiring manager was late on the call and joined for few minutes only. He was mute for whole duration and didn't speak a single word. My technical skills were not par as per the requirements of the position.