Sigurd, it must have brought back memories. Mine were taken in 1962 and it was all theory and no practical, not even in physics. I wasn't even aware that there was such a subject as Photography available. I suspect that by 1979 "O " levels has moved on by at least a generation
I just unearthed my certificate - AEB from 1977. I don't have the question paper. For that and prior years one had to submit negatives and prints. Later years you could keep negatives, if I remember rightly.
At least I can honestly claim to have _a_ qualification in photography!