Online Access Free PCA Exam Questions

Where does Prometheus store its time series data by default?

• A.In etcd.
• B.In an embedded TSDB on local disk.
• C.In an external database such as InfluxDB.
• D.In-memory only.

Which metric type uses the delta() function?

• A.Histogram
• B.Counter
• C.Info
• D.Gauge

Which PromQL statement returns the average free bytes of the filesystems over the last hour?

• A.sum(node_filesystem_avail_bytes[1h])
• B.avg(node_filesystem_avail_bytes[1h])
• C.sum_over_time(node_filesystem_avail_bytes[1h])
• D.avg_over_time(node_filesystem_avail_bytes[1h])

What should you do with counters that have labels?

• A.Save their state between application runs so you can restore their last value on startup.
• B.Investigate if you can move their label value inside their metric name to limit the number of labels.
• C.Instantiate them with their possible label values when creating them so they are exposed with a zero value.
• D.Make sure every counter with labels has an extra counter, aggregated, without labels.

What does the increase() function do in PromQL?

• A.Calculates the derivative of a gauge over time.
• B.Returns the total sum of values in a vector.
• C.Calculates the percentage increase of a counter over time.
• D.Returns the absolute increase in a counter over a specified range.