PCA (Prometheus Certified Associate) sample exam question with answer 160

Question:
What is the purpose of Prometheus scrape_interval?

1. Defines how long Prometheus waits before clearing out the TSDB
2. Defines what targets to scrape
3. Defines how frequently to scrape a target
4. Defines how long to wait for a scrape before timing out

Answer:
C - how frequently to scrape targets