PCA PCA Exporters & Instrumentation 2

Question 1

What is the Prometheus exposition format, and which content type does it use?

Accepted Answer

A text-based line format exposed over HTTP with Content-Type: text/plain; version=0.0.4

Answer

Prometheus's native exposition format is a human-readable text format served over HTTP with the text/plain content type.

Question 2

What does the `_total` suffix in a Prometheus metric name conventionally indicate?

Accepted Answer

The metric is a Counter that only increases over time

Answer

By convention, counter metrics are suffixed with _total to signal they are monotonically increasing cumulative counts.

Question 3

When instrumenting a web server with Prometheus, which metric type should track the total number of HTTP requests served?

Accepted Answer

Counter

Answer

HTTP requests are a monotonically increasing count, so a Counter is the correct type; you can then use rate() to compute requests per second.

Question 4

What is the purpose of the `HELP` line in the Prometheus text exposition format?

Accepted Answer

It provides a human-readable description of the metric for documentation and UI display

Answer

The HELP comment line gives a textual description of what the metric measures, shown in the Prometheus UI and documentation tools.

Question 5

Which exporter is commonly used to expose PostgreSQL database metrics to Prometheus?

Accepted Answer

postgres_exporter

Answer

The postgres_exporter (writerside/postgres_exporter) connects to PostgreSQL and exposes database statistics like connections, query counts, and replication lag.

(PCA) Prometheus Certified Associate Practice Test

(PCA) Prometheus Certified Associate Practice Test

PCA PCA Exporters & Instrumentation 2