Practice Move Instruction Example (2.2.2) - Signed Arithmetic and Overflow

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6 sample questions

Question 1.
Provide an example of when the zero flag is set.
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Think of subtracting a number from itself.
Question 2.
What does the sign flag indicate?
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Look at the most significant bit of the result.
3Question 3.
What occurs when an overflow happens in signed arithmetic?
- The result is invalid
- The sign bit is lost
- A carry is generated
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Think about the consequences of carrying over in binary.
4Question 4.
The carry flag is relevant to signed arithmetic. True or False?
- True
- False
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Reflect on the differences between signed and unsigned arithmetic.
Question 5.
If you add two 4-bit signed numbers 0111 and 1001, what will the result be? Discuss the effects on flags.
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Convert to binary, add them up, and check the sign and overflow.
Question 6.
Write a segment of code that checks if a number is positive, negative, or zero and directs flow appropriately.
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Think about how `IF` statements work in programming logic.

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