Computer Science (AS & A Level) · May / June 2025 · Paper 22 · Question 5

An automated digital camera system is used to take a sequence of pictures of animals in a garden. During the design of the system, a state‑transition diagram is produced. The table details the states in the automated digital camera system along with the events which cause the states to change. The system starts in standby mode. The sequence of pictures is taken when in active mode. Current state Event Next state standby mode turn on detect mode detect mode turn off standby mode detect mode movement detected active mode active mode 20 seconds elapsed sequence complete active mode turn off standby mode sequence complete time saved detect mode

Read automatically from the paper; the printed page above is exact.