PCA (Prometheus Certified Associate) sample exam question with answer 213

Question:
Which of the following is a benefit of the pull model of metrics ingestion?

1. Pull-based monitoring provides a built-in way to determine if a service is down
2. There is a slightly higher probability of DDoS-ing your monitoring
3. All monitoring targets can configure the same centralized point of ingestion
4. Pull-based monitoring does not scale

Answer:
A - is the correct answer
B - there is actually a slightly lower probability of DDoS-ing your monitoring as compared with the push model
C - in the pull model, the centralized system responsible for pulling (scraping) must be configured with all of the targets it is responsible for monitoring. Service discovery can help alleviate the majority of this burden
D - Prometheus's pull-based monitoring does scale