Which one of the following are characteristics of a hash function? (Choose two)

Which one of the following are characteristics of a hash function? (Choose two)
A . Requires a key
B. One-way
C. Fixed length output
D. Symmetric
E. Fast

Answer: B,C

Explanation:

Correct answers: One-way, Fixed length output https://en.wikipedia.org/wiki/Cryptographic_hash_function

A cryptographic hash function is a mathematical algorithm that maps data of arbitrary size (often called the "message") to a bit array of a fixed size (the "hash value", "hash", or "message digest"). It is a one-way function, that is, a function which is practically infeasible to invert.