PCA (Prometheus Certified Associate) sample exam question with answer 574

Question:
Which of the following types of observability data is MOST closely related to the definition given below?
A numeric measurement recorded over time

1. Trace
2. Metric
3. Time Table
4. Time Series

Answer:
D - is the correct answer. More at what-are-metrics
A - is incorrect as a trace is an end-to-end accounting of the flow of a transaction, including response times, status codes and metadata
B - is incorrect. Though a numeric measurement is the definition of a metric, when it is made over time it is referred to as a time series
C - is incorrect as this is not a term commonly used in the realm of observability