CAPE Physics Unit 2 · 2008 (T&T) · Paper 1 · Question Q26

Item 26 refers to the following diagram. Which is the correct truth table for the circuit above?

1. (A)A=1, B=1: Q=0; A=1, B=0: Q=1; A=0, B=1: Q=1; A=0, B=0: Q=0
2. (B)A=1, B=1: Q=1; A=1, B=0: Q=0; A=0, B=1: Q=0; A=0, B=0: Q=0
3. (C)A=1, B=1: Q=1; A=1, B=0: Q=1; A=0, B=1: Q=1; A=0, B=0: Q=0
4. (D)A=1, B=1: Q=1; A=1, B=0: Q=0; A=0, B=1: Q=0; A=0, B=0: Q=1

This question uses a figure or table from the paper — you'll see it when you practise.