It's a sim check initially on 737, 757, or 767.
Take off
SID
Track to a beacon,
steep turns
then possibly another beacon,
hold at the second beacon,
Procedural ILS to land
Same ILS with one engine
They give you the route when you arrive. It's quite tough, they are looking for a certain standard and the best tip is to memorise pitch and power settings and try not to go first which gives to time to prepare and stay within +/-100 ft and within 5 degrees of heading. Try to keep deviations on ILS down to 1/2 a dot too and don't go below selected speed at all.
They tell you there and then whether you'd be recommended and you usually get offered the course you request on the next day, if you pass. Aptitude tests and interviews are a 'healthcheck' as 'you can't fail them'. They then give you a debrief and tell you where to improve etc.
That's it!