Technician exam question T8D11
Subelement T8, SIGNALS AND EMISSIONS· Group T8D
What is the role of ARQ in a transmission system?
- A.A special transmission format limited to video signals
- B.A system used to encrypt command signals to an amateur radio satellite
- C.An error correction method in which the receiving station detects errors and sends a request for retransmission (correct answer)
- D.A method of compressing data using autonomous reiterative Q codes prior to final encoding
WhyARQ is an error correction method in which the receiving station detects errors and sends a request for retransmission. ARQ (Automatic Repeat reQuest) is an error-correction scheme where the receiving station detects a transmission error and asks the sender to retransmit the affected data, answer C. It isn't a video-only format (A), a satellite command encryption system (B), or a made-up data compression method using "Q codes" (D), those don't describe what ARQ actually does.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.