This sounds as bad as the incident also in India... Of the check pilot randomly popping CB's on a flight to "test" the candidate.
In answer to the question, don't be tempted to start playing with the box at low level.
Either fly the DP by convention means or inform ATC you will need radar vectors.
Otherwise this is a recipe for both heads down and nobody watching the shop.
After the flight, this should be a serious talking point as to what he is doing!