What does the Over Value Bit indicate?

What does the Over Value Bit indicate?

• A. The counter value rolls over from the largest positive value of +2147483648
• B. The counter value rolls over from the smallest negative value of -2147483648
• C. The counter value rolls over to zero after reaching the preset
• D. The counter value never rolls over

Answer: (A)

The Over Value Bit flags an overflow in a fixed-width counter—when the counter tries to exceed what its word size can represent. With a 32‑bit signed counter, the valid range is from -2,147,483,648 to +2,147,483,647. When you push past the largest positive value, the counter wraps to the most negative value. That transition is what the Over Value Bit indicates: the count has rolled over from the top end to the bottom end. The other options describe different behaviors (rolling to zero, or underflow), which aren’t what this bit signals.

The Over Value Bit flags an overflow in a fixed-width counter—when the counter tries to exceed what its word size can represent. With a 32‑bit signed counter, the valid range is from -2,147,483,648 to +2,147,483,647. When you push past the largest positive value, the counter wraps to the most negative value. That transition is what the Over Value Bit indicates: the count has rolled over from the top end to the bottom end. The other options describe different behaviors (rolling to zero, or underflow), which aren’t what this bit signals.