שאלה | What is the key idea behind parity check codes, and how do they differ from simple parity checking?

What is the key idea behind parity check codes, and how do they differ from simple parity checking?

		Parity check codes use a single parity bit for the entire message, while simple parity checking uses one parity bit per message.
		Parity check codes use a matrix of parity bits to detect and potentially correct the location of single-bit errors, unlike simple parity checking.
		Parity check codes provide 100% reliable error detection, unlike the probabilistic nature of simple parity checking.
		There is no difference between parity check codes and simple parity checking.