フリー問題

問題文

An engineer types a change on one unit of a pair and sees it on the other one right away. Later the engineer places a new certificate onto the same unit and finds that the other one still lacks it. Which pair fits?

選択肢

1. The firmware update moves to the other unit on its own as soon as the engineer works, and the file sync takes asking for first.
2. The setting update moves to the other unit on its own as soon as the engineer works, and the file sync takes asking for first.
3. The firmware update moves to the other unit on its own as soon as the engineer works, and the memory sync takes asking for first.
4. The setting update moves to the other unit on its own as soon as the engineer works, and the memory sync takes asking for first.