フリー問題

問題文

A team is deciding what kind of testing to run in each environment. Which allocation matches common practice for a code-promotion setup?

選択肢

1. Unit tests run on every change in the development environment, integration tests run in a staging environment against representative data, and production runs the validated pipelines, since each gate matches the data it can reach.
2. All testing happens in production against live data, because only production data reveals real failures, and the team fixes what breaks as the traffic reveals it.
3. Integration tests run on every change in the development environment, and unit tests run only in staging where representative data is available, where representative data makes the assertions meaningful.
4. Unit tests and integration tests both run only at release time, because running them more often provides no additional signal; the release gate carries the whole burden.