I will explain step by step what happened.
-I went for an interview at company A.
-The next day, I went for an interview at company B. I was offered the job and accepted it. I have already started working at company B.
-Interviewer(from Human Resources department) from company A tries to phone me to tell me that I had advanced to the next stage. I could not pick up my phone because my boss was near me. She sent me an email and told me I had advanced to next stage and that she would like to schedule another interview.
-I answered the email from company A within 24 hours and told her that although I am grateful because of them being interested in me, I had accepted another job offer that could not be declined.
-Interviewer from company A tried to phone me the next day but I could not pick up my phone because my boss was next to me. She sent me an email to ask me if I was interested in telling her about the job offer I had accepted.
-I answered within 24 hours and told her that I had already started working, I apologized for not being able to tell her about the job offer I accepted and told her that I preferred to keep those details private.
Was that the best way to answer that question? What was she trying to find out?