How do you know you didn’t get the job after the interview?

So I went in for a job interview yesterday that I thought went well from my standpoint but I’m not really sure if I got the job tbh. The interview was for Mercedes benz I’ve applied to a lot of different dealers and never got a call back except for Mercedes Benz twice first time was for a virtual interview which I hate those less opportunity to leave an impression. I never heard back and then I went for a in person interview yesterday. I thought I left a good impression the lady I went to interview for asked if. I wanted to do front desk or sales cause I had told her I wanted to get into sales. She also said she has a few openings in other departments in other locations that she kept me in mind for cause she liked how I spoke on the phone. She also made me interview with there service manager which he took my information before I left and I mean everything seemed like it went well with both. The lady I interviewed with said she had positions for front desk, service department and customer service hitch is all on the phones for the most part from what I got from the explanations. I haven’t heard back yet though does this mean I didn’t get the job or should I give it another day or two and then give them a call?
How do you know you didn’t get the job after the interview?
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