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A cryptographic hash function maps a bit string of arbitrary length to one of:

AFixed length
BFitted length
CFilled length
DFolded length
Answer & Solution
Correct answer: A. Fixed length
1. A hash accepts an input of any size at all. 2. Its output does not grow with the input. 3. A cryptographic hash function maps a bit string of arbitrary length to a fixed length bit string. 4. So the answer is fixed length. _Source: NIST SP 800-175B Rev. 1, 'Guideline for Using Cryptographic Standards in the Federal Government'_
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