PCA (Prometheus Certified Associate) sample exam question with answer 405

Question:
What networking protocol does Prometheus use to perform scrapes?

1. MQTT
2. SNMP
3. UDP
4. HTTP

Answer:
D - is the correct answer. More at features
A - is incorrect as Prometheus actually uses HTTP. Though MQTT is used in some monitoring systems, notably with the internet of things (IoT), it is not used by Prometheus
B - is incorrect as Prometheus actually uses HTTP. Though there is a Prometheus SNMP Exporter, this should not be confused with what Prometheus uses for scrapes
C - is incorrect as Prometheus actually uses HTTP