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[General] PCA Exam Collection, Dumps PCA Vce

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【General】 PCA Exam Collection, Dumps PCA Vce

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Linux Foundation PCA Exam Syllabus Topics:
TopicDetails
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
  • 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 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
  • 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.
Topic 5
  • 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.

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Linux Foundation Prometheus Certified Associate Exam Sample Questions (Q44-Q49):NEW QUESTION # 44
What is a difference between a counter and a gauge?
  • A. Counters and gauges are different names for the same thing.
  • B. Counters are only incremented, while gauges can go up and down.
  • C. Counters change value on each scrape and gauges remain static.
  • D. Counters have no labels while gauges can have many labels.
Answer: B
Explanation:
The key difference between a counter and a gauge in Prometheus lies in how their values change over time. A counter is a cumulative metric that only increases-it resets to zero only when the process restarts. Counters are typically used for metrics like total requests served, bytes processed, or errors encountered. You can derive rates of change from counters using functions like rate() or increase() in PromQL.
A gauge, on the other hand, represents a metric that can go up and down. It measures values that fluctuate, such as CPU usage, memory consumption, temperature, or active session counts. Gauges provide a snapshot of current state rather than a cumulative total.
This distinction ensures proper interpretation of time-series trends and prevents misrepresentation of one-time or fluctuating values as cumulative metrics.
Reference:
Extracted and verified from Prometheus official documentation - Metric Types section explaining Counters and Gauges definitions and usage examples.

NEW QUESTION # 45
Which kind of metrics are associated with the function deriv()?
  • A. Summaries
  • B. Gauges
  • C. Histograms
  • D. Counters
Answer: B
Explanation:
The deriv() function in PromQL calculates the per-second derivative of a time series using linear regression over the provided time range. It estimates the instantaneous rate of change for metrics that can both increase and decrease - which are typically gauges.
Because counters can only increase (except when reset), rate() or increase() functions are more appropriate for them. deriv() is used to identify trends in fluctuating metrics like CPU temperature, memory utilization, or queue depth, where values rise and fall continuously.
In contrast, summaries and histograms consist of multiple sub-metrics (e.g., _count, _sum, _bucket) and are not directly suited for derivative calculation without decomposition.
Reference:
Extracted and verified from Prometheus documentation - PromQL Functions - deriv(), Understanding Rates and Derivatives, and Gauge Metric Examples.

NEW QUESTION # 46
How do you configure the rule evaluation interval in Prometheus?
  • A. You can configure the evaluation interval in the Prometheus TSDB configuration file and in the rule configuration file.
  • B. You can configure the evaluation interval in the scraping job configuration file and in the command-line flags.
  • C. You can configure the evaluation interval in the service discovery configuration and in the command-line flags.
  • D. You can configure the evaluation interval in the global configuration file and in the rule configuration file.
Answer: D
Explanation:
Prometheus evaluates alerting and recording rules at a regular cadence determined by the evaluation_interval setting. This can be defined globally in the main Prometheus configuration file (prometheus.yml) under the global: section or overridden for specific rule groups in the rule configuration files.
The global evaluation_interval specifies how frequently Prometheus should execute all configured rules, while rule-specific intervals can fine-tune evaluation frequency for individual groups. For instance:
global:
evaluation_interval: 30s
This means Prometheus evaluates rules every 30 seconds unless a rule file specifies otherwise.
This parameter is distinct from scrape_interval, which governs metric collection frequency from targets. It has no relation to TSDB, service discovery, or command-line flags.
Reference:
Verified from Prometheus documentation - Configuration File Reference, Rule Evaluation and Recording Rules sections.

NEW QUESTION # 47
What does the evaluation_interval parameter in the Prometheus configuration control?
  • A. How often Prometheus evaluates recording and alerting rules.
  • B. How often Prometheus scrapes targets.
  • C. How often Prometheus sends metrics to remote storage.
  • D. How often Prometheus compacts the TSDB data blocks.
Answer: A
Explanation:
The evaluation_interval parameter defines how frequently Prometheus evaluates its recording and alerting rules. It determines the schedule at which the rule engine runs, checking whether alert conditions are met and generating new time series for recording rules.
For example, setting:
global:
evaluation_interval: 30s
means Prometheus evaluates all configured rules every 30 seconds. This setting differs from scrape_interval, which controls how often Prometheus collects data from targets.
Having a proper evaluation interval ensures alerting latency is balanced with system performance.

NEW QUESTION # 48
Which exporter would be best suited for basic HTTP probing?
  • A. SNMP exporter
  • B. JMX exporter
  • C. Blackbox exporter
  • D. Apache exporter
Answer: C
Explanation:
The Blackbox Exporter is the Prometheus component designed specifically for probing endpoints over various network protocols, including HTTP, HTTPS, TCP, ICMP, and DNS. It acts as a generic probe service, allowing Prometheus to test endpoints' availability, latency, and correctness without requiring instrumentation in the target application itself.
For basic HTTP probing, the Blackbox Exporter performs HTTP GET or POST requests to defined URLs and exposes metrics like probe success, latency, response code, and SSL certificate validity. This makes it ideal for uptime and availability monitoring.
By contrast, the JMX exporter is used for collecting metrics from Java applications, the Apache exporter for Apache HTTP Server metrics, and the SNMP exporter for network devices. Thus, only the Blackbox Exporter serves the purpose of HTTP probing.
Reference:
Verified from Prometheus documentation - Blackbox Exporter Overview and Exporter Usage Guidelines.

NEW QUESTION # 49
......
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