MP Human Resources Entry Level interview questions

Recruiter call and then was setup with the hiring manager. The hiring manager was not at all friendly, the interview was done away from office with really bad connection. This was an entry level position and I didn't have much experience directly in HR and yet he asked me all HR questions that I'm assuming a senior HR associate can answer well. He made someone else join the call, who wasn't even on the invite so I wasn't expecting that. Got a call next day and was told they are going a different direction, didn't understand the reasoning at all.