Certified Blockchain Business Foundations (CBBF) — Question 8

What is a hash function?

Answer options

• A. A one-way function that converts input to a unique string output
• B. A function that stores data behind a key
• C. A two-way function used for condensing information
• D. The block-ID of the block
• E. All the above

Correct answer: D

Explanation

The correct answer is D, as a hash function specifically refers to a unique identifier for data blocks, known as block-ID. The other options describe different types of functions or concepts that do not accurately define what a hash function does.