Get Feb-2026 Download Latest & Valid Questions For Linux Foundation PCA exam [Q16-Q32]

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Get Feb-2026 Download Latest & Valid Questions For Linux Foundation PCA exam

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Linux Foundation PCA Exam Syllabus Topics:

Topic	Details
Topic 1	PromQL: This section of the exam measures the skills of Monitoring Specialists and focuses on Prometheus Query Language (PromQL) concepts. It covers data selection, calculating rates and derivatives, and performing aggregations across time and dimensions. Candidates also study the use of binary operators, histograms, and timestamp metrics to analyze monitoring data effectively, ensuring accurate interpretation of system performance and trends.
Topic 2	Alerting and Dashboarding: This section of the exam assesses the competencies of Cloud Operations Engineers and focuses on monitoring visualization and alert management. It covers dashboarding basics, alerting rules configuration, and the use of Alertmanager to handle notifications. Candidates also learn the core principles of when, what, and why to trigger alerts, ensuring they can create reliable monitoring dashboards and proactive alerting systems to maintain system stability.
Topic 3	Observability Concepts: This section of the exam measures the skills of Site Reliability Engineers and covers the essential principles of observability used in modern systems. It focuses on understanding metrics, logs, and tracing mechanisms such as spans, as well as the difference between push and pull data collection methods. Candidates also learn about service discovery processes and the fundamentals of defining and maintaining SLOs, SLAs, and SLIs to monitor performance and reliability.
Topic 4	Prometheus Fundamentals: This domain evaluates the knowledge of DevOps Engineers and emphasizes the core architecture and components of Prometheus. It includes topics such as configuration and scraping techniques, limitations of the Prometheus system, data models and labels, and the exposition format used for data collection. The section ensures a solid grasp of how Prometheus functions as a monitoring and alerting toolkit within distributed environments.
Topic 5	Instrumentation and Exporters: This domain evaluates the abilities of Software Engineers and addresses the methods for integrating Prometheus into applications. It includes the use of client libraries, the process of instrumenting code, and the proper structuring and naming of metrics. The section also introduces exporters that allow Prometheus to collect metrics from various systems, ensuring efficient and standardized monitoring implementation.

QUESTION 16
Which of the following signals belongs to symptom-based alerting?

API latency

Disk space

Database availability

CPU usage

QUESTION 17
What is considered the best practice when working with alerting notifications?

Minor alerts are as important as major alerts and should be treated with equal care.

Have as few alerts as possible by alerting only when symptoms might become externally visible.

Have as many alerts as possible to catch minor problems before they become outages.

Make sure to generate alerts on every metric of every component of the stack.

QUESTION 18
Given the metric prometheus_tsdb_lowest_timestamp_seconds, how do you know in which month the lowest timestamp of your Prometheus TSDB belongs?

format_date(prometheus_tsdb_lowest_timestamp_seconds,”%M”)

prometheus_tsdb_lowest_timestamp_seconds % month

month(prometheus_tsdb_lowest_timestamp_seconds)

(time() – prometheus_tsdb_lowest_timestamp_seconds) / 86400

QUESTION 19
Which of the following metrics is unsuitable for a Prometheus setup?

prometheus_engine_query_log_enabled

promhttp_metric_handler_requests_total{code=”500″}

http_response_total{handler=”static/*filepath”}

user_last_login_timestamp_seconds{email=”[email protected]”}

QUESTION 20
Which of the following PromQL queries is invalid?

max by (instance) up

max on (instance) (up)

max without (instance) up

max without (instance, job) up

QUESTION 21
How would you name a metric that measures gRPC response size?

grpc_response_size_bytes

grpc_response_size

grpc_response_size_total

grpc_response_size_sum

QUESTION 22
What does the rate() function in PromQL return?

The total increase of a counter over a range.

The per-second rate of increase of a counter metric.

The average of all values in a vector.

The number of samples in a range vector.

QUESTION 23
If the vector selector foo[5m] contains 1 1 NaN, what would max_over_time(foo[5m]) return?

It errors out.

NaN

No answer.

QUESTION 24
How would you add text from the instance label to the alert’s description for the following alert?
alert: InstanceDown
expr: up == 0
for: 5m
labels:
severity: page
annotations:
description: “Instance INSTANCE_NAME_HERE down”

Use $labels.instance instead of INSTANCE_NAME_HERE

Use $value.instance instead of INSTANCE_NAME_HERE

Use $expr.instance instead of INSTANCE_NAME_HERE

Use $metric.instance instead of INSTANCE_NAME_HERE

QUESTION 25
Which Alertmanager feature allows you to temporarily stop notifications for a specific alert?

Silence

Inhibition

Deduplication

Grouping

QUESTION 26
Which kind of metrics are associated with the function deriv()?

Counters

Gauges

Summaries

Histograms

QUESTION 27
How do you configure the rule evaluation interval in Prometheus?

You can configure the evaluation interval in the global configuration file and in the rule configuration file.

You can configure the evaluation interval in the service discovery configuration and in the command-line flags.

You can configure the evaluation interval in the scraping job configuration file and in the command-line flags.

You can configure the evaluation interval in the Prometheus TSDB configuration file and in the rule configuration file.

QUESTION 28
What is api_http_requests_total in the following metric?
api_http_requests_total{method=”POST”, handler=”/messages”}

“api_http_requests_total” is a metric label name.

“api_http_requests_total” is a metric type.

“api_http_requests_total” is a metric name.

“api_http_requests_total” is a metric field.

QUESTION 29
How can you use Prometheus Node Exporter?

You can use it to instrument applications with metrics.

You can use it to collect resource metrics from the application HTTP server.

You can use it to collect metrics for hardware and OS metrics.

You can use it to probe endpoints over HTTP, HTTPS.

QUESTION 30
What does scrape_interval configure in Prometheus?

It defines how frequently to scrape targets.

It defines how frequently to evaluate rules.

It defines how often to send alerts.

It defines how often to refresh metrics.

QUESTION 31
With the following metrics over the last 5 minutes:
up{instance=”localhost”} 1 1 1 1 1
up{instance=”server1″} 1 0 0 0 0
What does the following query return:
min_over_time(up[5m])

{instance=”localhost”} 1 {instance=”server1″} 0

{instance=”server1″} 0

QUESTION 32
What is the maximum number of Alertmanagers that can be added to a Prometheus instance?

More than 3