There is no way to guarantee you are the first or the last interview of the day or the process when scheduling your time. However, you may ask for the earliest or latest available time slot on your given day.

Is it better to have interview first or last?

If you go in first, their memory of you dims with every other candidate who is interviewed. And, the interviewer has ten days to forget or confuse you with another candidate. On the other hand, if you are one of the last to be interviewed, their memory of you will be freshest.

Which interview slot is best?

Typically, the specific times for the best interview slots include any interviews times between 10:00 a.m. and 11:30 p.m. This is because it gives employers enough time in the early morning to get energized for the workday and review your application details.