フリー問題

問題文

A tuning discussion turns to which shared memory structure holds which kind of content. Which pairing of a System Global Area structure with its content is correct?

選択肢

1. The shared pool holds copies of data blocks read from the data files so that later requests for the same blocks avoid disk reads.
2. The redo log buffer holds copies of data blocks read from the data files so that later requests for the same blocks avoid disk reads.
3. The database buffer cache holds copies of data blocks read from the data files so that later requests for the same blocks avoid disk reads.
4. The large pool holds copies of data blocks read from the data files so that later requests for the same blocks avoid disk reads.