PCA (Prometheus Certified Associate) sample exam question with answer 512

Question:
What is a Prometheus scrape instance?

1. A single target within a scrape job
2. The term given to the server from which scrapes are performed
3. A set of targets to be scraped
4. A common configuration specifying how to collect metrics from several targets

Answer:
A - is the correct answer. More at jobs_instances
B - is incorrect as this is simply referred to as a Prometheus server
C - is incorrect as an instance represents a scrape of a single target
D - is incorrect as this is the definition of a scrape configuration