Computer Science · May / June 2020 · Paper 12 · Question 4
0478
As printed in the paper
Show the answer and mark scheme
4(a)(i)[2]
NAND4(a)(ii)[2]
NOR4(b)[4]
A
B
C
Working space
X
0
0
0
0
0
0
1
0
0
1
0
1
0
1
1
1
1
0
0
0
1
0
1
0
1
1
0
1
1
1
1
1
4 marks for 8 correct outputs
3 marks for 6 or 7 correct outputs
2 marks for 4 or 5 correct outputs
1 mark for 2 or 3 correct outputs
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