Received the following 2 questions on HackerRank: https://imgur.com/a/lJWoY6p

After HackerRank, received a link to a short automated video interview. A simple data structure question was asked and you had 1.5 minutes to think over your answer then 5 minutes to state your answer.

Question (as far as I can remember):
A hotel booking system was designed with a huge list as its main data structure, given a set of requirements (related to reservations, etc.), what are the pros and cons of using this list. What other data structure would be more suitable?