In resource metrics, saturation refers to which of the following?

• A. The rate at which a resource is being requested.
• B. The maximum capacity of a resource being used.
• C. The current uptime of the system.
• D. The average latency of requests.

Answer: (B)

Saturation in resource metrics means the resource is operating at its full capacity and cannot absorb more work without performance dropping. This matches the idea of the maximum capacity of a resource being used. When a system is saturated, you typically see limited headroom for additional demand, leading to queueing and rising delays as more requests come in. The rate at which requests are made describes demand, uptime is about availability, and average latency is the time a request takes—these are related phenomena, but saturation specifically denotes hitting the capacity limit.