Computer Science · Oct / Nov 2022 · Paper 12 · Question 7
0478
As printed in the paper
The question as text
NAND, OR and XOR are three types of logic gate.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
7(a)[4]
One mark for each correct row
NAND
OR
XOR
Statement
(✓)
(✓)
(✓)
if both inputs are 1, the output is 1
if both inputs are different from each other, the output is 1if both inputs are 0, the output is 0if both inputs are the same as each other, the output is always 07(b)[2]
One mark for a correct logic gate, one mark for a corresponding truth table
ANDA
B
Output
0
0
0
0
1
0
1
0
0
1
1
1
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