Practice Carry Flag (1.4.3) - Flags and Conditional Instructions - Computer Organisation and Architecture - Vol 2

Practice: Carry Flag

Lesson 1.4.3Flags and Conditional Instructions

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9 questions

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6 sample questions

Question 1.
What does the Zero Flag indicate after an arithmetic operation?
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Think about what you would check to determine whether two numbers are equal.
Question 2.
What is a conditional instruction?
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Consider statements you use in programming like 'if' statements.
3Question 3.
What is a conditional instruction?
- An immediate instruction
- An instruction executed based on condition
- An instruction that never executes
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Think about programming 'if' conditions.
4Question 4.
True or False: The Carry Flag is set when subtraction requires a borrow.
- True
- False
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Imagine borrowing in everyday math.
Question 5.
You have an 8-bit signed register that holds the value 127. You add 1 to it. What happens to the Overflow Flag, and why?
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Draw the binary representation to visualize the overflow.
Question 6.
Write a pseudo code that checks for a condition based on the Zero Flag after subtracting two numbers. Explain how you would decide the next steps.
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Plan out steps logically as if you were writing a flowchart.

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