128. Arithmetic Edge Cases-II

Question.7

A firmware engineer writes this before adding two unsigned values:

uint16_t a = sensor_reading;
uint16_t b = offset;

if (a > UINT16_MAX - b) {
   handle_overflow_error();
   return;
}
uint16_t result = a + b;

What technique is this code demonstrating?

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Clamping — limiting the result to the maximum representable value
Pre-check overflow detection — verifying that the addition won't overflow before performing it
Saturation arithmetic — wrapping to zero on overflow
Bounds checking — ensuring array indices are valid

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