How many errors can the Digital Electronics parity method find in a single word? (A) Single error(B) Double error(C) Triple error(D) Multiple errors
Question
How many errors can the Digital Electronics parity method find in a single word? (A) Single error(B) Double error(C) Triple error(D) Multiple errors
Solution
The Digital Electronics parity method can find a (A) Single error in a single word. This method involves adding an extra bit to each data word which is set to either 0 or 1 depending on whether there is an even or odd number of "1" bits in the word. The parity bit makes the total number of 1-bits either even (in even parity) or odd (in odd parity). When the word is received or read back, a new parity bit is computed and compared to the old one. If the parity bits do not match, an error is detected. However, this method can only detect an odd number of errors. So, it can detect a single error but not double errors because two errors would still result in even parity.
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