A-LevelComputer ScienceHardware9618/12 · Oct/Nov 2021 · Q24 Marks
Complete the truth table for each of the following two logic gates. [Figure showing a NOR gate and a NAND gate with empty truth tables]
- (a)Complete the truth table for each of the following two logic gates. [Figure showing a NOR gate and a NAND gate with empty truth tables][2]
- (b)Draw a logic circuit for the following logic expression. X = NOT(NOT(A AND B)AND C) [Figure showing an empty box with inputs A, B, C and output X][2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2021). The mark or mark type is shown in brackets.
- [1] 1 mark for each completely correct truth table (for NOR gate)
- [1] 1 mark for each completely correct truth table (for NAND gate)
- [1] NOT (A AND B) // A NAND B
- [1] NOT the result AND C // the result NAND C
Write your answer and get it marked
On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.
Sign up free →