ITPEC IP October 2021 Question 3
ITPEC IP October 2021 — Question 3 of 100
The final output is Agree only when all three inputs are Agree. Each box behaves as a logical AND: the first returns Agree only if inputs 1 and 2 both agree. The second then returns Agree only if that intermediate result and input 3 both agree, so every original input must agree.
Answer (d)
Why not others:
- one or two Agree inputs are insufficient
- Disagree is produced whenever at least one input is Disagree, not only when two or more disagree
Key rule: Cascading AND operations gives (input 1 AND input 2) AND input 3, equivalent to AND across all three inputs.
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