問題文
A team is writing a small program that posts measurements directly to the ingest endpoint. They want to know what forms the metric value may take. Which statement is correct?
選択肢
- The value must be an integer between zero and one hundred, because all metrics are normalized to a percentage scale on arrival; a value outside that band is clamped to the nearer end before it is stored.
- The value must be a string in every case, and the ingest endpoint parses it into a number using the locale of the sending host; the decimal separator has to match that locale.
- The value may be a signed integer, a floating point number, or a numeric string in decimal or fixed-point notation, and it is stored as a 64-bit integer.
- The value may be any JSON type including objects and arrays, because the ingest endpoint stores the payload as received and the structure is interpreted later when a chart requests it and reaches into the field it needs.