> Unless of course, you merely use this question as a ruse to elicit a discussion about low-level systems programming.
Didn't OP already imply that the point of the question was not as much to get a specific answer, but to probe whether or not the interviewee knows about all the factors that need to be considered?
Didn't OP already imply that the point of the question was not as much to get a specific answer, but to probe whether or not the interviewee knows about all the factors that need to be considered?