ITPEC IP April 2024 Question 2
ITPEC IP April 2024 — Question 2 of 100
The truth table represents the AND operation because its output is 1 only when both inputs are 1. For inputs (0,0), (0,1), and (1,0), at least one input is 0, so AND produces 0. Only (1,1) satisfies both conditions and produces 1.
This can be written as A AND B or A ∧ B. The four results in row order are therefore 0, 0, 0, 1, exactly as shown.
Answer (a)
Why not others:
- (b) NOT is a unary operation and reverses one input rather than combining two inputs
- (c) OR outputs 1 when either or both inputs are 1, giving 0, 1, 1, 1
- (d) XOR outputs 1 when the inputs differ, giving 0, 1, 1, 0
Key rule: AND is true only when every operand is true; OR needs at least one true operand, while XOR needs the operands to differ.
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