PCA (Prometheus Certified Associate) sample exam question with answer 361

Question:
How are Service Level Indicators MOST commonly defined?

1. Using logs
2. Using metrics
3. Using traces
4. Using chaos engineering

Answer:
B - is the correct answer
A - is incorrect as logs generally have to be run through some sort of filter to generate a metric before they can be used in an SLI. In this case, it is still ultimately a metric that that the SLI is based on
C - is incorrect as traces generally have to be aggregated and filtered to generate a metric before they can be used in an SLI. In this case, it is still ultimately a metric that the SLI is based on
D - is incorrect as chaos engineering is the discipline of experimenting on a system in order to build confidence in the system's capability to withstand turbulent conditions. It is not used for defining SLIs