PCA 試験問題を無料オンラインアクセス

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

• A.grpc_response_size_bytes
• B.grpc_response_size
• C.grpc_response_size_sum
• D.grpc_response_size_total

What does the increase() function do in PromQL?

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

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_second$_count[5m])
• B.rate(http_request_duration_seconds_sum[5m]) / rate(http_request_duration_seconds_count[5m])
• C.rate(http_request_duration_seconds_total[5m]) / rate(http_request_duration_seconds_average[5m])
• D.rate(http_request_duration_seconds_sum[5m]) / rate(http_request_duration_seconds_average[5m])

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

• A.It errors out.
• B.No answer.
• C.NaN
• D.1

Which function would you use to calculate the 95th percentile latency from histogram data?

• A.topk(0.95, http_request_duration_seconds)
• B.percentile(http_request_duration_seconds, 0.95)
• C.quantile_over_time(0.95, http_request_duration_seconds[5m])
• D.histogram_quantile(0.95, sum(rate(http_request_duration_seconds_bucket[5m])) by (le))