フリー問題

問題文

A dashboard runs the same statement every minute against a table that is loaded once a day. The first run of the day consumes credits and the subsequent runs do not. What explains this?

選択肢

1. The warehouse keeps the scanned files in its own local storage, so the later runs read from there and are therefore free of cost.
2. The metadata layer answers the statement itself, and any statement made against an unchanged table is answered from metadata alone.
3. The result of the first run is reused for the later runs because the statement text and the underlying data are both unchanged.
4. The dashboard tool caches the result on its own side, so Snowflake never receives the later requests at all.