I understand 'occurrences' in the country's airspace are checked prior to the inspection also - this most likely could be the reason for some technical questions on a particular subject.
Surely checking crew proficiency and systems knowledge is not an accepted/authorised part of a ramp check?
Where does it say that?
Never been questioned about my knowledge of anything other then location of papers.
In that case my answer would have been: "too tired and stressed to remember, let me check with my company, handling agent, manuals, union representative, lawyer etc..." :-)
Really - is that what you'd do on company checks as well. Your airline operates into other countries on the basis of it being compliant - don't know if they would appreciate your lack of cooperation.