39. Bitwise Rotation and Counting-II

Question.5

A protocol parser contains this code:

uint16_t reg = received_word;
uint16_t sync = 0x00F0;
for (int i = 0; i < 16; i++) {
   if (reg == sync) return i;
   reg = (reg << 1) | (reg >> 15);
}

What technique is this code demonstrating?

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Bit reversal — flipping the bit order of received_word
Circular pattern matching — checking if the received word is a rotation of the sync pattern
Hamming distance calculation — measuring bit differences between two values
CRC validation — checking the integrity of the received data

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