PCA (Prometheus Certified Associate) sample exam question with answer 87

Question:
Which of the following pieces of data is MOST closely associated with the following definition?
A textual representation of an event, commonly structured with key-value-based metadata

1. Time series
2. Metric
3. Trace
4. Log

Answer:
D - Log is the correct answer
A - is incorrect as a time series is a series of numerical measurements and is not text-based
B - metrics are numerical measurements, not text-based
C - a trace details an end-to-end flow of a transaction, including response times, status codes and metadata as processing flows through one or more services