1) create a very small web API
2) CLI the frontend spa of your choice
Just toy examples with some in memory data and filtering
Time boxed to an hour.
No crazy puzzles. Just demonstrate you can do the basics. See how far you can get, discuss as you go...
High failure rate. Even when I'd basically prep the candidates in the phone screen.
I'd basically tell them what they had to do. Still didn't prepare.
I've been burned on the take home projects and super crazy timed algo puzzle tests with the terrible instructions. I try to take the stress out of it as much as I can.