AQA COMPUTER SCIENCE 7517/1 PAPER 1 VERSION 1.0 FINAL VERSION 1.0 FINAL |QUESTION PAPER AND MERGED MARKING SCHEME JUNE 2023

Tabitha secretly chooses one of the coloured shapes and: • tells Walter the colour of the shape she has chosen (pink, yellow or blue) • tells Lionel the type of shape she has chosen (triangle, circle or square). Lionel and Walter both know what coloured shapes are on the table. Lionel knows that Walter has been told the colour chosen by Tabitha. Walter knows that Lionel has been told the type of shape chosen by Tabitha. They do not know what the other has been told. Tabitha first asks Walter and Lionel if they know which coloured shape she has chosen. They both answer at the same time and say “No”. Tabitha then asks them again if they know which coloured shape she has chosen. They both answer at the same time and say “No” again. Tabitha asks them a third time if they know which coloured shape she has chosen and they both answer at the same time and say “Yes”. Section A You are advised to spend no longer than 40 minutes on this section. Enter your answers for Section A in your Electronic Answer Document. You must save this document at regular intervals. 0 1 Describe the process that should be followed to add an item to a circular queue implemented as a static data structure using an array. Your method should deal appropriately with any issues which could arise. [5 marks] 0 2 Figure 1 shows a logic puzzle. Figure 1 0 2 . 1 After they have both replied to Tabitha’s first question, what does Lionel now know about Tabitha’s choice because Walter said “No”? [1 mark]3 IB/G/Jun23/7517/1 Turn over ► 0 2 . 2 After they have both replied to Tabitha’s first question, what does Walter now know about Tabitha’s choice because Lionel said “No”? [1 mark] 0 2 . 3 Which coloured shape had Tabitha chosen? [1 mark] Turn over for the next question