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Given the metric prometheus_tsdb_lowest_timestamp_seconds, how do you know in which month belongs the lowest timestamp of your Prometheus TSDB?
Which of the following is an invalid @ modifier expression?
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?

How do you calculate the average request duration during the last 5 minutes from a histogram or summary called http_request_duration_seconds?
Which PromQL expression computes the rate of API Server requests across the different cloud providers from the following metrics?

How would you name a metric that measures GRPC response size?
What function calculates the φ-quantile from a histogram?
What is the best way to expose a timestamp from your application?
What is the minimum requirement for an application to expose Prometheus metrics?
What is the name of the official *nix OS kernel metrics exporter?
How can you use Prometheus node exporter?
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The following is a list of metrics exposed by an application:

What is the issue with the metric family?
How would you name a metric that tracks HTTP request duration?
How would you correctly name a metric that provides metadata information about the binary?
What should you do with counters that have labels?
What is the difference between client libraries and exporters?
What is considered the best practice when working with alerting notifications?
Which of the following signal does belong to symptom-based alerting?
What are Inhibition rules?
Which receiver will get an alert when the following alert is firing?

Given the following Alertmanager configuration:

Which field in alerting rules files indicates the time an alert needs to go from pending to firing state?
What is the maximum number of Alertmanagers that can be added to a Prometheus instance?
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Which PromQL statement returns the sum of all values of the metric node_memory_MemAvailable_bytes from 10 minutes ago?