Flip One Bit | Dataford Interview Questions

Abbott device protocols such as FreeStyle Libre may encode sensor status and measurement flags in individual bits of a byte. Given an unsigned 8-bit value and a bit position, flip exactly that bit and return the resulting byte.

Bit positions are numbered from 0 through 7, where position 0 is the least significant bit. Flipping means changing 0 to 1 or 1 to 0, while leaving every other bit unchanged.

Formal Specification

Implement flip_bit(byte_value, bit_position).

Input: byte_value, an integer from 0 through 255, and bit_position, an integer from 0 through 7.
Output: An integer from 0 through 255 representing byte_value after the selected bit is toggled.
The input is valid, so no error handling is required.

Constraints

0 <= byte_value <= 255
0 <= bit_position <= 7
Exactly one bit is flipped
All unselected bits remain unchanged

Function Signature

def flip_bit(byte_value, bit_position):

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