What is the primary purpose of logs in a cloud native environment?

To trace the path of a single request across multiple microservices

To record discrete events with timestamps and contextual information for debugging and auditing

To provide a real-time graphical view of system health

To measure the rate of requests per second across a service

What is the main purpose of OpenTelemetry?

To provide a visualization dashboard for all telemetry data

To provide a standard set of APIs and SDKs for generating and collecting telemetry data (logs, metrics, traces)

To store telemetry data in a cloud-native database

To replace Prometheus as the primary metrics backend

A team uses Prometheus to monitor a Kubernetes cluster. They notice that Prometheus is consuming a lot of memory and is slow to respond to queries. They suspect that the number of time series is too high. Which action would most directly reduce the number of time series?

Remove high-cardinality labels from metrics.

Use a separate Prometheus instance for each namespace.

Reduce the scrape interval from 15s to 30s.

Increase the retention period for metrics.

Kubernetes and Cloud Native Associate (KCNA)

Domain 3Objective 3

Observability KCNA Practice Questions (Page 6)

Part of the Cloud Native Application Delivery domain, which accounts for 16% of the KCNA exam. Linux Foundation does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–10 in this domain), expect 2–3 from this objective — we provide 31 practice questions to prepare you well beyond it. (estimate)

31questions here

7free pages

7concepts

16%of the exam

Questions 26–30

26foundation · easy
What is the primary purpose of logs in a cloud native environment?
Select an answer first
27foundation · easy
What is the main purpose of OpenTelemetry?
Select an answer first
28application · medium
A support team is troubleshooting a customer-reported issue: a request to the order service fails, but the error is not visible in the service's metrics. The team has access to logs and traces. Which combination of telemetry data would be most useful to diagnose the root cause?
Select an answer first
29expert · hard
A team uses Prometheus to monitor a Kubernetes cluster. They notice that Prometheus is consuming a lot of memory and is slow to respond to queries. They suspect that the number of time series is too high. Which action would most directly reduce the number of time series?
Select an answer first
30foundation · easy
Which three data types are commonly referred to as the three pillars of observability?
Select an answer first

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Observability KCNA Practice Questions (Page 6)

Questions 26–30

What is the primary purpose of logs in a cloud native environment?

What is the main purpose of OpenTelemetry?

A support team is troubleshooting a customer-reported issue: a request to the order service fails, but the error is not visible in the service's metrics. The team has access to logs and traces. Which combination of telemetry data would be most useful to diagnose the root cause?

A team uses Prometheus to monitor a Kubernetes cluster. They notice that Prometheus is consuming a lot of memory and is slow to respond to queries. They suspect that the number of time series is too high. Which action would most directly reduce the number of time series?

Which three data types are commonly referred to as the three pillars of observability?

Keep studying — Cloud Native Application Delivery