In RHEL 10, there are multiple options for running scheduled jobs.
To start with, there is a systemd timer.
This is the primary and preferred solution for scheduling recurring jobs.
And that is because it integrates so well with systemd.
Then there is cromd.
Cromd is an older scheduling solution which is still supported and a bit easier to schedule
custom tasks.
And there is add, or AT, which is available to schedule non-recurring user tasks.
For your exam, if you want to run a job periodically, investigate if you should do it using systemd
timers.
But you might get a question about cron as well.
Read the exam question carefully and make your choice.
Add is not so very common.
That is something you only do for once-only tasks.