## Section A You are advised to spend no longer than 40 minutes answering this section. Here is a copy of the pre-release material. DO NOT attempt Tasks 1, 2 and 3 now. Use the pre-release material and your experience from attempting the tasks before the examination to answer Question 1. ## Pre-release material A company supplies concrete slabs for paving. The slabs are made to order in batches of 20; all slabs in a batch are identical. Customers can order from a small range of standard sizes and colours. All measurements are given in millimetres. The price is calculated at \$0.05 for a volume of $100000 \mathrm{~mm}^{3}$ of grey concrete; red and green concrete are charged at 10\% more. Customers can choose their own colours; a custom colour has an initial set up cost of \$5 then 15\% more than the price for grey. | Colour of slab | | :--- | | Grey | | Red | | Green | | Custom | | Depth of slab | | :--- | | 38 | | 45 | | Shapes | Sizes for each shape | | :--- | :--- | | Square | 600 × 600 or 450 × 450 | | Rectangular | 600 × 700 or 600 × 450 | | Round | Diameter 300 or 450 | Write and test a program or programs for the concrete slab company. - Your program or programs must include appropriate prompts for the entry of data; data must be validated on entry. - Error messages and other output need to be set out clearly and understandably. - All variables, constants and other identifiers must have meaningful names. You will need to complete these three tasks. Each task must be fully tested. Task 1 - Price for a batch of 20 slabs Using the information above set up a routine that allows a customer to choose the concrete slab they require and calculate a price for a batch of 20 slabs. The details of the slab chosen and the price for a batch of 20 should be displayed on the screen. Task 2 - Customer places an order Using the information from TASK 1, the customer places an order for the number of slabs they require. Orders for fewer than 20 slabs or more than 100 slabs are not accepted; orders that are not a multiple of 20 are rounded up to the next multiple of 20 slabs. Display the order price and the number of slabs to be produced. Task 3 - Flexible pricing The cost of concrete is variable. The cost for $100000 \mathrm{~mm}^{3}$ of grey concrete can be input and two grades are available; basic at the cost input and best at 7\% more. Use a copy of your program for TASK 1 to develop TASK 3 to input the cost and grade of concrete before calculating the price for 20 slabs. 1 (a) All variables, constants and other identifiers must have meaningful names. (i) Describe the data structures that you have used to store the data for the concrete slabs in Task 1, include the name, data type and use for each data structure. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ [5] (ii) State one variable that you have used in Task 3. Give the data type for the variable. State what it is used for. Variable name \_\_\_\_ Data type \_\_\_\_ Use \_\_\_\_ \_\_\_\_ [3] (b) Explain how you calculated the volume of a concrete slab in Task 1. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ [3] (c) Write an algorithm for Task 2, using either pseudocode, programming statements or a flowchart. Assume that Task 1 has been completed. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ (d) Explain how you changed your program for Task 1 to meet the requirements for Task 3. Include and fully explain any altered or additional programming statements. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_

2019 - O/N - 0478/22 | Q1

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## Section A You are advised to spend no longer than 40 ...