A-LevelComputer ScienceHardware9618/32 · May/June 2022 · Q65 Marks
A logic circuit has two inputs A and B, and two outputs E and F. [Figure X.X showing a logic circuit with inputs A, B and outputs E, F]
- (a)Complete the truth table for this logic circuit. INPUT A B OUTPUT E F 0 0 0 1 1 0 1 1[2]
- (b)(i)State the name of this logic circuit.[1]
- (b)(ii)State the purpose of each output E and F. Purpose of E Purpose of F[2]
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Mark scheme
Marking points from the official mark scheme (May/June 2022). The mark or mark type is shown in brackets.
- [2] 1 mark per correct output column INPUT A B OUTPUT E F 0 0 0 0 0 1 1 0 1 0 1 0 1 1 0 1
- [1] Half adder
- [2] Purpose of E: Sum Purpose of F: Carry
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