Monitoring & Observability interview questions — Easy
124 easy-level Monitoring & Observability questions from our Performance Testing bank, each with the correct answer and an explanation of why it is correct.
This topic slice is available to practise but is not yet part of our indexed set.
What this covers
Monitoring & Observability appears throughout Performance Testing interviews. At easy level, interviewers are typically checking that you know the fundamentals and can describe them precisely — definitions, defaults, and the basic mechanics. Work through these, then explain your answer out loud; the second part is what interviews actually test.
20 example questions
1. In the context of Monitoring, log aggregation is best described as:
- A. Timed unit of work within a distributed trace.
- B. Central collection and search of application logs.correct
- C. Visualization of latency distribution over time.
- D. Process exposing system metrics for Prometheus.
Why: log aggregation: Central collection and search of application logs.
2. In Monitoring, what does synthetic monitoring do or refer to?
- A. Scripted probes checking availability from outside.correct
- B. Timed unit of work within a distributed trace.
- C. Single visualization of a metric query in Grafana.
- D. Visualization of latency distribution over time.
Why: synthetic monitoring: Scripted probes checking availability from outside.
3. Which of the following best describes log aggregation in Monitoring?
- A. Process exposing system metrics for Prometheus.
- B. Central collection and search of application logs.correct
- C. Latency, traffic, errors, and saturation.
- D. Timed unit of work within a distributed trace.
Why: log aggregation: Central collection and search of application logs.
4. Which of the following best describes dashboard panel in Monitoring?
- A. Single visualization of a metric query in Grafana.correct
- B. Prometheus query language for metrics.
- C. Central collection and search of application logs.
- D. Scripted probes checking availability from outside.
Why: dashboard panel: Single visualization of a metric query in Grafana.
5. Which of the following best describes synthetic monitoring in Monitoring?
- A. Latency, traffic, errors, and saturation.
- B. Scripted probes checking availability from outside.correct
- C. Timed unit of work within a distributed trace.
- D. Visualization of latency distribution over time.
Why: synthetic monitoring: Scripted probes checking availability from outside.
6. What is the purpose of dashboard panel in Monitoring?
- A. Process exposing system metrics for Prometheus.
- B. Timed unit of work within a distributed trace.
- C. Single visualization of a metric query in Grafana.correct
- D. Prometheus query language for metrics.
Why: dashboard panel: Single visualization of a metric query in Grafana.
7. In Monitoring, what does log aggregation do or refer to?
- A. Timed unit of work within a distributed trace.
- B. Single visualization of a metric query in Grafana.
- C. Latency, traffic, errors, and saturation.
- D. Central collection and search of application logs.correct
Why: log aggregation: Central collection and search of application logs.
8. Which of the following best describes golden signals in Monitoring?
- A. Latency, traffic, errors, and saturation.correct
- B. Process exposing system metrics for Prometheus.
- C. Scripted probes checking availability from outside.
- D. Prometheus query language for metrics.
Why: golden signals: Latency, traffic, errors, and saturation.
9. What is the purpose of synthetic monitoring in Monitoring?
- A. Scripted probes checking availability from outside.correct
- B. Timed unit of work within a distributed trace.
- C. Process exposing system metrics for Prometheus.
- D. Single visualization of a metric query in Grafana.
Why: synthetic monitoring: Scripted probes checking availability from outside.
10. In Monitoring, what does dashboard panel do or refer to?
- A. Timed unit of work within a distributed trace.
- B. Central collection and search of application logs.
- C. Single visualization of a metric query in Grafana.correct
- D. Latency, traffic, errors, and saturation.
Why: dashboard panel: Single visualization of a metric query in Grafana.
11. Which of the following best describes exporter in Monitoring?
- A. Visualization of latency distribution over time.
- B. Prometheus query language for metrics.
- C. Single visualization of a metric query in Grafana.
- D. Process exposing system metrics for Prometheus.correct
Why: exporter: Process exposing system metrics for Prometheus.
12. What is the purpose of log aggregation in Monitoring?
- A. Central collection and search of application logs.correct
- B. Timed unit of work within a distributed trace.
- C. Visualization of latency distribution over time.
- D. Process exposing system metrics for Prometheus.
Why: log aggregation: Central collection and search of application logs.
13. In Monitoring, what does heatmap do or refer to?
- A. Timed unit of work within a distributed trace.
- B. Single visualization of a metric query in Grafana.
- C. Process exposing system metrics for Prometheus.
- D. Visualization of latency distribution over time.correct
Why: heatmap: Visualization of latency distribution over time.
14. Which of the following best describes span in Monitoring?
- A. Central collection and search of application logs.
- B. Timed unit of work within a distributed trace.correct
- C. Visualization of latency distribution over time.
- D. Prometheus query language for metrics.
Why: span: Timed unit of work within a distributed trace.
15. In Monitoring, what does exporter do or refer to?
- A. Visualization of latency distribution over time.
- B. Timed unit of work within a distributed trace.
- C. Single visualization of a metric query in Grafana.
- D. Process exposing system metrics for Prometheus.correct
Why: exporter: Process exposing system metrics for Prometheus.
16. In Monitoring, what does span do or refer to?
- A. Timed unit of work within a distributed trace.correct
- B. Central collection and search of application logs.
- C. Single visualization of a metric query in Grafana.
- D. Visualization of latency distribution over time.
Why: span: Timed unit of work within a distributed trace.
17. What is the purpose of span in Monitoring?
- A. Timed unit of work within a distributed trace.correct
- B. Latency, traffic, errors, and saturation.
- C. Single visualization of a metric query in Grafana.
- D. Central collection and search of application logs.
Why: span: Timed unit of work within a distributed trace.
18. What is the purpose of PromQL in Monitoring?
- A. Prometheus query language for metrics.correct
- B. Central collection and search of application logs.
- C. Process exposing system metrics for Prometheus.
- D. Latency, traffic, errors, and saturation.
Why: PromQL: Prometheus query language for metrics.
19. In Monitoring, what does golden signals do or refer to?
- A. Single visualization of a metric query in Grafana.
- B. Timed unit of work within a distributed trace.
- C. Latency, traffic, errors, and saturation.correct
- D. Visualization of latency distribution over time.
Why: golden signals: Latency, traffic, errors, and saturation.
20. What is the purpose of exporter in Monitoring?
- A. Scripted probes checking availability from outside.
- B. Single visualization of a metric query in Grafana.
- C. Central collection and search of application logs.
- D. Process exposing system metrics for Prometheus.correct
Why: exporter: Process exposing system metrics for Prometheus.