Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-008-003
What is the purpose of a Cyclic Redundancy Check (CRC)?
- A Lossy compression
- B Error correction
- C Lossless compression
- D Error detection
Correct answer: D — Error detection. From the official ISED question bank, verified word for word.
Why
A Cyclic Redundancy Check acts like a digital fingerprint that the receiver calculates to verify if data arrived intact. 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.