フリー問題

問題文

A company instruments five services written in three languages. Each team invents its own attribute names for the HTTP status code. What problem do OpenTelemetry semantic conventions solve here?

選択肢

1. They replace the need for a Resource on the provider.
2. They compress attribute names on the wire, which lowers the number of bytes each exported batch consumes.
3. They validate attribute values at runtime and reject records that do not match.
4. They provide common names for the same kind of data, so queries and dashboards work across codebases, libraries and platforms.