Like any large corporation you're going to have to jump through hoops.
I worked for Compass Group many years ago.
Been there. Done that.
The skills test is something that, if you already know your way around the kitchen, you will do fine.
The rest of the tests will leave you frustrated.
There are no correct answers.
There is no rhyme nor reason to the questions and they will be asked 3-4 times but with the wording changed to throw you off.
Those tests evaluate you psychologically so the company doesn't end up hiring some nut case or something. The tests can also show evidence of management abilities, personal beliefs and work ethic.
You can't even study for these tests.
Just go with the flow to the best of your ability. Best of luck