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Question
Two computers that communicate with each other use a simple parity check to detect errors for ASCII transmissions. Which of the following events will always lead to an undeleted error?
Options:
A .  one bit or any odd number of bits inverted in a byte during transmission
B .  one bit or any odd number of bits inverted in a block of data during transmission
C .  two bits or any even number of bits inverted in a block during transmission
D .  two bits or any even number of bits inverted in a byte during transmission
E .  None of these
Answer: Option D
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