Practice Conditional Instructions And Flags In Programming (3.3) - Understanding Overflow in Signed and Unsigned Arithmetic

Practice: Conditional Instructions and Flags in Programming

Lesson 3.3Understanding Overflow in Signed and Unsigned Arithmetic

Practise this section

9 questions

Flashcard drill
4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What does the zero flag indicate?
Show hintHide hint
Think about what happens when you add or subtract two identical numbers.
Question 2.
What does the carry flag signify?
Show hintHide hint
Consider what happens with the maximum possible value in binary.
3Question 3.
What does the carry flag indicate during arithmetic operations?
- Indicates an overflow
- Indicates a carry out
- Indicates a negative result
Show hintHide hint
Consider the implications of working with only the highest bit.
4Question 4.
True or False: An overflow flag being set always means the result is negative.
- True
- False
Show hintHide hint
Think about the types of operations where overflow might occur.
Question 5.
Consider two signed 4-bit binary numbers: 0111 (7) and 0001 (1). Perform the addition and analyze the flags set in the result.
Show hintHide hint
Remember, how does the signed representation affect the outputs?
Question 6.
Explain what would happen if you attempted to add binary numbers: 1000 (-8) and 1000 (-8) in 4-bit signed arithmetic.
Show hintHide hint
Grid out the binary addition to visualize the carry and sign changes.

5 more questions in this section. Enroll free to practise them all.