PCA (Prometheus Certified Associate) sample exam question with answer 537

Question:
What is the purpose of a Prometheus exporter?

1. To collect metric data from a non-Prometheus source and transform it into a format that Prometheus can consume
2. To monitor the performance of the Prometheus server itself
3. To provide a web interface for querying Prometheus metric data
4. To alert users when a defined condition has been met

Answer:
A - is the correct answer. This allows Prometheus to monitor a wide range of systems and applications