Providence interview questions

The interview process was divided into 3 rounds , the first two rounds were technical and the final round was the HR round. The first two rounds were based on the computer core subjects and DSA. The DSA questions were not very hard and were pretty basic.

I was scheduled for an interview that no hiring ever showed up for. I was given notification through email to show up on time. I waited for more than 15 min and nothing. They send a bunch of robot/automated emails that look like there from real “people” but no one will actually respond. I had to call there office only for them to tell me it was already filled. Why didn’t they email, call, or just decline the interview straight? It was a complete waste of my time. This was such an unprofessional experience. Your just another number. I’ll probably never apply here again.