Module 5 · Recall check

1. Which of these four metric types is correct for tracking total HTTP requests served since the process started?

2. You write `rate(http_requests_total[5m])`. What does this actually compute?

3. Prometheus pulls metrics from targets on a schedule. What's the right way to tell it about a new service in Kubernetes?

4. You have `hello_devops_http_requests_total{path="/",code="200"} 1000` and `hello_devops_http_requests_total{path="/healthz",code="200"} 400`. Which PromQL gives you the total request rate per second across all paths?

5. A user complains your service is slow. Your RED metrics show rate normal and errors normal; the duration histogram shows P99 latency climbing from 50ms to 2s. Where do you look first?