PCA (Prometheus Certified Associate) sample exam question with answer 591

Question:
What does the scrape_duration_seconds time series indicate in Prometheus?

1. The number of samples the target exposed
2. The duration of the scrape
3. The number of new series in the scrape
4. The number of samples remaining after metric relabeling was applied

Answer:
B - is the correct answer. For each instance scrape, Prometheus stores a sample in the scrape_duration_seconds time series, which indicates the duration of the scrape