ITPEC IP October 2022 Question 95
ITPEC IP October 2022 — Question 95 of 100
The correct DFD has Reception writing the guest list, while Show to seat reads both the guest list and seating availability. The question states that a guest's name is registered at reception, so data flows from Reception into the Guest list store. Seat allocation then references both stores, so their arrows flow into Show to seat.
Answer (d)
Why not others:
- (a) reverses all relevant store directions
- (b) makes Reception read seating availability and Show to seat feed Reception
- (c) incorrectly has Reception update seating availability
Key rule: In a DFD, an arrow into a data store means write; an arrow from a store to a process means read.
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