フリー問題

問題文

A team must be able to change the instruction text weekly without risking a regression in the parsing success rate. Which practice supports that?

選択肢

1. Review the wording of each change and release it if two engineers agree it reads correctly; a defect in an instruction shows up as text that a careful reader can recognize as ambiguous, and a second reader catches the cases that would degrade the parsing rate.
2. Release to 100 percent of traffic and watch the error rate for an hour, on the view that a regression in parsing would appear in that window and could be reverted.
3. Rely on the schema validation to catch any regression in production, a response that fails to parse being rejected there before the client ever sees it at all.
4. Keep a fixed set of inputs whose expected structure is known, run it against each candidate instruction, and compare the parsing rate before releasing.