フリー問題

問題文

A database runs on a release that is too old for a direct upgrade to the target release. Which approach does the upgrade documentation prescribe?

選択肢

1. Export the whole database and import it into a freshly created target database because a two step upgrade is not supported by the utility.
2. Upgrade to an intermediate release which supports a direct upgrade to the target and run the preupgrade checks before each of the two upgrades.
3. Restore a backup of the old database into the target home and let the first startup convert the dictionary to the new release automatically.
4. Migrate to an intermediate release which supports a direct upgrade to the target and run the preupgrade checks only before the second upgrade.