PCA (Prometheus Certified Associate) sample exam question with answer 205

Question:
Which of the following is NOT a function or operator defined in PromQL?

1. subtraction ( - )
2. select
3. increase
4. exponentiation ( ^ )

Answer:
B - correct, while select is a keyword in SQL, it is not defined in PromQL
A, D - this is a PromQL arithmetic binary operator
C - this is a PromQL function