Maintenance Technician Practice Test 2025 - Free Maintenance Technician Practice Questions and Prep Guide

To determine which sequence contains an odd parity bit, we need to count the number of '1's in each sequence. An odd parity bit is used for error detection and ensures that the total number of '1' bits in the sequence, including the parity bit, is odd.

Looking at the sequence provided:

In the first sequence, 0110011, there are four '1's. This results in an even count, indicating that to achieve odd parity, a parity bit would need to be added, making the total number of '1's five, which is indeed odd.

For the other sequences:

- The second sequence, 1110010, has five '1's, which already is odd and does not need an additional parity bit.

- The third sequence, 1010111, contains four '1's as well, which is even and would require an additional bit for odd parity.

- The fourth sequence, 0101000, contains just two '1's, which is even and also requires a parity bit to achieve an odd count.

Thus, only the first sequence has an odd parity bit when accounted for, as it starts even and can correctly utilize a parity bit to become odd.