Outside of I.T. (specifically software development), what other occupations have you prove (via an assignment/challenge/test) that you have the skills necessary to do the job during the interview process?

Any of these:

Engineering, Accounting/Finance, Pharmacy, Medical, Scientist, Education, Electrical, Plumbing, Chef, etc.

It seems much more prevalent for developers.

Often even when it’s a professional referral, the proof is needed.

Is it based on past hire mishaps who can’t do the job, lack of trust in a resume, or that’s the way it’s been for years, so it’s become the standard?

An interesting thought (to me).