Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-008-008
Which algorithm may be used to create a Cyclic Redundancy Check (CRC)?
- A Lempel-Ziv routine
- B Hash function
- C Dynamic Huffman code
- D Convolution code
Correct answer: B — Hash function. From the official ISED question bank, verified word for word.
Why
A Cyclic Redundancy Check acts like a digital fingerprint to spot errors in data, and a hash function is the specific type of algorithm designed to create these fixed-size summaries from any amount of input. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.