A-LevelComputer ScienceHardware9618/12 · Oct/Nov 2023 · Q45 Marks
Write the Boolean expression that corresponds to the following logic circuit. [Figure X.X]
- (a)Write the Boolean expression that corresponds to the following logic circuit. [Figure X.X][3]
- (b)Complete the truth table for the logic expression: X = A XOR (B AND (A NAND B) AND NOT C) A B C Working space X 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1[2]
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Mark scheme
Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.
- [3] (a) A NAND B NOT(B XOR C) Final NAND X = A NAND B NAND (NOT(B XOR C))
- [2] (b) 1 mark for each set of rows (shaded) A B C X 0 0 0 0 0 0 1 0 0 1 0 1 0 1 1 0 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1
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