If your hiring process includes a design exercise, and you expect the candidate to make one presentation at the end without touching base throughout the process, then:
a) The test is not representative of a real process
b) The test is representative, but your process is bad
If your hiring process includes a design exercise, and you expect the candidate to make one presentation at the end without touching base throughout the process, then:
a) The test is not representative of a real process
b) The test is representative, but your process is bad