That's just bad outdated practice. It leads to cramming and less remembering than of the demand is for students to do work and show learning and effort throughout the year.

That's maybe something a school can do if exams are next week, or after.

At my school, tomorrow is the last day of exams. Most of the students have left campus. There's no time or mechanism to schedule an(other) exam.

Exams have performance variance. Otherwise you're only getting a pass/fall signal in any case.

That feels like a poor statistical evaluation. Why not test along the way with progressive complexity/depth?

Using attendance is a carrot to get students to show up, which leads to better learning outcomes overall - which should be the goal.

Then you're testing how good someone is at exams as much as anything