問題文
After running yarn start in a freshly created Backstage app, a developer sees two streams of output prefixed with [0] and [1] in the same terminal window. They want to know what those two streams are. Which explanation is correct?
選択肢
- One is the compiler in watch mode and the other is the test runner, which starts automatically alongside it.
- One is the frontend app and the other is the backend, started as two separate processes by the same command.
- One is the app and the other is the database server.
- They are two replicas of the backend, started so that the local database can be shared and locking behavior can be observed during development.