Practice Test Geeks(PCA) Prometheus Certified Associate Practice Test
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PCA Exporters & Integrations Flashcards

6 cards from real PCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the primary role of a Prometheus exporter?

    Answer: Translating third-party system metrics into Prometheus exposition format

    Exporters bridge systems that don't natively expose Prometheus metrics by collecting data from them and serving it in the Prometheus text exposition format.

  2. Which exporter is the standard choice for exposing Linux host-level metrics such as CPU, memory, and disk?

    Answer: node_exporter

    The `node_exporter` exposes a comprehensive set of hardware and OS metrics from Linux/Unix hosts via `/proc` and `/sys`.

  3. What does the Prometheus blackbox_exporter probe?

    Answer: External endpoint availability via HTTP, HTTPS, DNS, TCP, and ICMP

    The blackbox_exporter performs synthetic probes over HTTP(S), DNS, TCP, and ICMP to test external endpoint reachability and response time.

  4. How does Prometheus scrape the blackbox_exporter to probe a specific target URL?

    Answer: The target URL is passed as a query parameter (?target=) in the scrape URL

    Prometheus passes the probe target as `?target=` (and optionally `?module=`) in the scrape URL to a single blackbox_exporter instance.

  5. What metric does the blackbox_exporter expose to indicate whether a probe succeeded?

    Answer: probe_success

    `probe_success` is set to 1 when a probe passes all checks and 0 when any check fails, serving as the primary availability signal.

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

    Answer: postgres_exporter

    The `postgres_exporter` (by Prometheus Community) connects to PostgreSQL and exposes connection counts, query stats, replication lag, and more.