Computer Science · Oct / Nov 2021 · Paper 12 · Question 11
0478
As printed in the paper
The question as text
Consider the following logic statement: X = (((A AND B) OR (NOT (B OR C))) NAND C)
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
11(a)[5]
One mark per each correct logic gate with correct input(s)
A
B
X
C
11(b)[4]
4 marks for 8 correct outputs
3 marks for 6/7 correct outputs
2 marks for 4/5 correct outputs
1 mark for 2/3 correct outputs
A
B
C
Working space
X
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
0
11(c)[2]
NORXOR / EOR
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