ITPEC IP October 2019 Question 1
ITPEC IP October 2019 — Question 1 of 100
The final output is Agree only when all three inputs are Agree. Each box behaves like a logical AND: the first box outputs Agree only if inputs 1 and 2 are both Agree, and the second box outputs Agree only if that result and input 3 are both Agree.
Answer (d)
Why not others:
- one Agree input is not sufficient
- two Agree inputs are not sufficient if the remaining input is Disagree
- output Disagree occurs when even one input is Disagree, not only when two or more disagree
Key rule: Cascaded two-input AND operations are associative: (A AND B) AND C is true only when A, B, and C are all true.
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