127. Arithmetic Edge Cases-I

Question.3

A developer checks if a sensor reading is below a threshold:

int error_code = -1;
unsigned int threshold = 1;

if (error_code < threshold) {
   printf("Below threshold");
} else {
   printf("Above threshold");
}

What is the output?

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Below threshold — -1 is less than 1
Above threshold — -1 is promoted to a huge unsigned value (4,294,967,295), which is greater than 1
Compilation error — cannot compare signed and unsigned
Below threshold — the compiler converts threshold to signed for comparison

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