A-LevelComputer ScienceProgramming9618/32 · Oct/Nov 2022 · Q410 Marks

A program to manage regular flight details at an airport requires some user-defined data types.

(a)Write pseudocode statements to declare the enumerated data type Aircraft to hold data about the types of aircraft used for a flight. These types of aircraft are: C300, C350, D242, E757, X380.[2]
(b)Write pseudocode statements to declare the composite data type Flight to hold data about flights to a specific destination. These include: • flight number, which could be any combination of letters and numbers • destination • date of departure • type of aircraft used. Use the enumerated data type you created in part (a).[4]
(c)(i)Write the pseudocode statement to set up a variable for one record of the composite data type Flight.[1]
(c)(ii)Write pseudocode to store the details of the following flight in the variable you set up in part (c)(i). Field Data flight number XA782 destination Cambridge date of departure 12/12/2022 type of aircraft used C350 Use the field names you created in part (b).[3]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2022). The mark or mark type is shown in brackets.

[2] (a) Marks as shown in the square brackets: TYPE Aircraft = (C300, C350, D242, E757, X380) TYPE Aircraft = [1] (C300, C350, D242, E757, X380)[1]
[1] (b) One mark for each point (Max 4) • TYPE Flight and ENDTYPE correct
[1] (b) • DECLARE FlightNumber and DECLARE Destination as STRING
[1] (b) • DECLARE DepartureDate as DATE
[1] (b) • DECLARE AircraftType as Aircraft (correct data type from part 4(a)) Example answer: TYPE Flight DECLARE FlightNumber : STRING DECLARE Destination : STRING DECLARE DepartureDate : DATE DECLARE AircraftType : Aircraft ENDTYPE
[1] (c)(i) Example answer: DECLARE Flight1 : Flight
[1] (c)(ii) One mark for each point (Max 3) • Correct assignments of both string data values
[1] (c)(ii) • Correct assignments of date data value
[1] (c)(ii) • Correct assignments of enumerated data value Example answer: Flight1.FlightNumber ← "XA782" Flight1.Destination ← "Cambridge" Flight1.DepartureDate ← 12/12/2022 Flight1.AircraftType ← C350

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