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Question 1
PromQLAsk AstroTutor
Which PromQL statement returns the sum of all values of the metric node_memory_MemAvailable_bytes from 10 minutes ago?
- A sum(node_memory_MemAvailable_bytes) setoff 10m
- B offset sum(node_memory_MemAvailable_bytes[10m])
- C sum(node_memory_MemAvailable_bytes offset 10m)
- D sum(node_memory_MemAvailable_bytes) offset 10m
Question 2
PromQLQuestion 3
PromQLQuestion 4
PromQLQuestion 5
Alerting & DashboardingThat's the end of the Preview
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Topics covered:Observability ConceptsPrometheus FundamentalsPromQLInstrumentation and ExportersAlerting & Dashboarding
Log In / Sign UpGiven the metric prometheus_tsdb_lowest_timestamp_seconds, how do you know in which month belongs the lowest timestamp of your Prometheus TSDB?
- A month(prometheus_tsdb_lowest_timestamp_seconds)
- B format_date(prometheus_tsdb_lowest_timestamp_seconds,"%M")
- C (time() - prometheus_tsdb_lowest_timestamp_seconds) / 86400
- D prometheus_tsdb_lowest_timestamp_seconds % month
Which of the following is an invalid @ modifier expression?
- A go_goroutines @ start()
- B sum(http_requests_total{method="GET"}) @ 1609746000
- C go_goroutines @ end()
- D sum(http_requests_total{method="GET"} @ 1609746000)
Given the following Histogram metric data, how many requests took less than or equal to 0.1 seconds?
How would you add a text from the instance label to the alert’s description for the following alert?
- A Use "labels.instance" instead of INSTANCE_NAME_HERE
- B Use #labels.instance instead of INSTANCE_NAME_HERE
- C Use {{ $labels.instance}} instead of INSTANCE_NAME_HERE
- D Use $labels.instance instead of INSTANCE_NAME_HERE
Question 6
PromQLQuestion 7
PromQLQuestion 8
Instrumentation and ExportersQuestion 9
PromQLQuestion 10
Instrumentation and ExportersQuestion 11
Instrumentation and ExportersQuestion 12
Instrumentation and ExportersQuestion 13
Instrumentation and ExportersQuestion 14
Prometheus FundamentalsQuestion 15
Instrumentation and ExportersQuestion 16
Instrumentation and ExportersQuestion 17
Prometheus FundamentalsQuestion 18
Instrumentation and ExportersQuestion 19
Alerting & DashboardingQuestion 20
Alerting & DashboardingQuestion 21
Alerting & DashboardingQuestion 22
Alerting & DashboardingQuestion 23
Alerting & DashboardingQuestion 24
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How do you calculate the average request duration during the last 5 minutes from a histogram or summary called http_request_duration_seconds?
- A rate(http_request_duration_seconds_total[5m]) / rate(http_request_duration_seconds_count[5m])
- B rate(http_request_duration_seconds_sum[5m]) / rate(http_request_duration_seconds_count[5m])
- C rate(http_request_duration_seconds_sum[5m]) / rate(http_request_duration_seconds_average[5m])
- D rate(http_request_duration_seconds_total[5m]) / rate(http_request_duration_seconds_average[5m])
Which PromQL expression computes the rate of API Server requests across the different cloud providers from the following metrics?
- A rate(sum by (cloud)(apiserver_request_total{job="kube-apiserver"})(5m])
- B rate(apiserver_request_total{job="kube-apiserver")[5m]) by (cloud)
- C sum by (cloud) (apiserver_request_total(job="kube-apiserver"})
- D sum by (cloud)(rate(apiserver_request_total{job="kube-apiserver"}[5m]))
How would you name a metric that measures GRPC response size?
- A grpc_response_size
- B grpc_response_size_total
- C grpc_response_size_bytes
- D grpc_response_size_sum
What function calculates the φ-quantile from a histogram?
- A histogram()
- B predict_linear()
- C avg_over_time()
- D histogram_quantile()
What is the best way to expose a timestamp from your application?
- A With a constant metric of value 1 and the timestamp as label.
- B With a constant metric of value 1 and the timestamp as metric timestamp.
- C With a gauge that has the timestamp as value.
- D With a counter that is increased to the correct value.
What is the minimum requirement for an application to expose Prometheus metrics?
- A It must be able to serve text over HTTP.
- B It must run on Linux.
- C It must be compiled for 64-bit architectures.
- D It must be exposed to the Internet.
What is the name of the official *nix OS kernel metrics exporter?
- A os_exporter
- B node_exporter
- C prometheus_exporter
- D metrics_exporter
How can you use Prometheus node exporter?
- A You can use it to collect metrics for hardware and OS metrics.
- B You can use it to instrument applications with metrics.
- C You can use it to collect resource metrics from the application HTTP server.
- D You can use it to probe endpoints over HTTP, HTTPS.
The following is a list of metrics exposed by an application:
What is the issue with the metric family?
- A verb label content should be normalized to lowercase.
- B Metric names are missing a prefix to indicate which application is exposing the query.
- C Unit is missing in the http_requests_total metric name.
- D The value represents two different thigs accross the dimensions: code and verb.
How would you name a metric that tracks HTTP request duration?
- A http_request_duration
- B http_request_latency
- C request_duration_seconds
- D http_request_duration_seconds
How would you correctly name a metric that provides metadata information about the binary?
- A app_build
- B app_metadata
- C app_build_desc
- D app_build_info
What should you do with counters that have labels?
- A Instantiate them with their possible label values when creating them so they are exposed with a zero value.
- B Investigate if you can move their label value inside their metric name to limit the number of labels.
- C Save their state between application runs so you can restore their last value on startup.
- D Make sure every counters with labels has an extra counter, aggregated, without labels.
What is the difference between client libraries and exporters?
- A Exporters expose metrics for scraping. Client libraries push metrics via Remote Write.
- B Exporters are written in Go. Client libraries are written in many languages.
- C Exporters run next to the services to monitor, and use client libraries internally.
- D Exporters and client libraries mean the same thing.
What is considered the best practice when working with alerting notifications?
- A Make sure to generate alerts on every metric of every component of the stack.
- B Minor alerts are as important as major alerts and should be treated with equal care.
- C Have as many alerts as possible to catch minor problems before they become outages.
- D Have as few alerts as possible by alerting only when symptoms might become externally visible.
Which of the following signal does belong to symptom-based alerting?
- A API latency
- B CPU usage
- C Disk space
- D Database availability
What are Inhibition rules?
- A Inhibition rules repeat a set of alerts when another matching alert is firing.
- B Inhibition rules mute a set of alerts when another matching alert is firing.
- C Inhibition rules inject a new set of alerts when a matching alert is firing.
- D Inhibition rules inspect alerts when a matching set of alerts is firing.
Which receiver will get an alert when the following alert is firing?
Given the following Alertmanager configuration:
- A team-Y-pager
- B team-X-pager
- C team-X-mails
- D team-Y-mails
Which field in alerting rules files indicates the time an alert needs to go from pending to firing state?
- A expr
- B fire_after
- C for
- D offset
What is the maximum number of Alertmanagers that can be added to a Prometheus instance?
