KCNA Cloud Native Observability Practice Question
Which TWO of the following are valid PromQL functions? (Select two.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
histogram_quantile()
rate() and histogram_quantile() are common PromQL functions. avg_over_time() is also valid but avg is not a function, it's an aggregation operator.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
topk()
Why it's wrong here
topk is an aggregation operator, not a function.
- ✓
histogram_quantile()
Why this is correct
histogram_quantile() calculates quantiles from histogram metrics.
- ✓
rate()
Why this is correct
rate() calculates the per-second average rate of increase.
- ✗
avg()
Why it's wrong here
avg is an aggregation operator, not a function.
- ✗
sum()
Why it's wrong here
sum is an aggregation operator, not a function.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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