Three Customer Service Advisor interview questions

Roughly 45 minutes with the store manager, I was asked to talk about myself and a few questions. It was calm and I did not feel like I was under pressure.

Had and interview and everything went well except the fact that I had asked how secure is the position I was told that after the training that they review the employee and basically the job is not always secure. I only asked this question due to the fact alot of people I knew who worked there lost their job after 3 months and I needed security. I of course did not get the job. Later on I found out from a member of their team that's the only reason I didn't get the job because of my 1 question.