フリー問題

問題文

Views on a published extract are slower than the client expects on first open, although the same views are quick when reopened soon after. Which mechanism explains the difference?

選択肢

1. The query results are indexed after the first request, so later requests are served with a faster lookup.
2. The query results are compressed after the first request, so later requests are served with a smaller response.
3. The query results are cached after the first request, so later requests are served without repeating the work.
4. The query results are aggregated after the first request, so later requests are served with fewer rows.