Computer Science · Oct / Nov 2023 · Paper 22 · Question 9
0478
As printed in the paper
The question as text
Consider the logic expression: Z = (A NAND B) OR NOT (B XOR C)
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
9(a)[4]
One mark for each correct gate, with the correct input(s) as shown.
9(b)[4]
Four marks for eight correct outputs.
Three marks for six or seven correct outputs.
Two marks for four or five correct outputs.
One mark for two or three correct outputs
A
B
C
Z
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1
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1
0
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0
1
1
1
1
0
0
1
1
0
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1
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1
0
0
1
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1
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