Day 5 Check Storage and Retrieval

Check yourself

Ten questions on the two designs from Day 5, object storage and the ad platform. Both separate a small fast index from a very large payload, and both allow a briefly wrong state that something else tidies up afterwards. Several questions ask you to name that state.

You will be asked 10 questions drawn from a larger bank, so a second attempt will not be the same paper. Answer from what the designs actually said, not from what sounds sensible in general.