I haven't applied to any of those firms.
I have applied to four firms that have asked silly questions about which character you would be in a book or suchlike. Does that mean that asking about one's congruence with fictional characters is common practice?
Three firms ask for letter + CV. Is that common practice? I know it isn't, but it's three more than asked for second year results.
There are, by definition, a near infinite number of things that are not expressly stated on recruiting sites. I don't see the mileage in second guessing what some of them might be.