,"$L3f",null,{"backHref":"/gcse/computer-science/aqa/questions","basePath":"/gcse/computer-science/aqa/representing-algorithms/questions","formulaUrl":null,"initialIndex":75,"initialQuestionWindow":[{"id":"39a8e36f-372c-455c-afc4-4bdc04495cec","revisionId":"24808384-5bc7-4005-9826-47bd23740b7b","questionNumber":null,"questionType":"LA","specification":"An epidemiologist is designing a computer model to simulate the spread of a respiratory virus through a population. In their model, they represent each person as a simple state (Susceptible, Infectious, or Recovered), while completely ignoring details such as their specific occupation, dietary preferences, and height.","difficulty":2,"difficultyBand":"easy","totalMarks":1,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"a7017c87-2b07-4be2-a442-9c62341a09dd","label":null,"content":"State the computational thinking technique demonstrated by this process of omitting non-essential details to focus only on what is necessary.","markscheme":"- Abstraction (or abstracting) B1","marks":1,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"3a22b371-ea82-4811-971a-896158ee3737","revisionId":"003808c9-4c1e-40c7-b8e9-035afd54a284","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"88c56b9c-9fab-4284-a685-3ac661ff4a06","label":null,"content":"Complete the trace table for the algorithm shown in **Figure 1** when the initial value of `multiplier` is 2.\n\nFigure 1\n```text\nsum ← 1\nFOR count ← 1 TO 3\n sum ← sum * multiplier\nENDFOR\n```\n\nYou may not need to use all rows of the trace table.\n\n| multiplier | count | sum |\n| :--- | :--- | :--- |\n| 2 | | 1 |\n| | | |\n| | | |\n| | | |\n| | | |","markscheme":"- Shows correct sequential values of `count` ($1, 2, 3$) in the table B1\n- Shows correct intermediate values ($2, 4$) and final value ($8$) of `sum` in the table B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"3aa5b6d0-7dbe-4de6-9ed1-f301c0649eef","revisionId":"38be47f1-3712-4b0a-9e36-7aa931e6f9aa","questionNumber":null,"questionType":"LA","specification":"An algorithm is used to troubleshoot a smart home thermostat. The pseudocode for this algorithm is shown below:\n\n```\n1 OUTPUT 'Is the green LED flashing?'\n2 response ← USERINPUT\n3 IF response = 'yes' THEN\n4 OUTPUT 'Is the router connected to the Internet?'\n5 response ← USERINPUT\n6 IF response = 'no' THEN\n7 OUTPUT 'Replace device'\n8 ELSE\n9 OUTPUT 'Restart the router'\n10 ENDIF\n11 ELSE\n12 OUTPUT 'Is the power cable damaged?'\n13 response ← USERINPUT\n14 IF response = 'yes' THEN\n15 OUTPUT 'Replace device'\n16 ELSE\n17 OUTPUT 'Plug into a different socket'\n18 ENDIF\n19 ENDIF\n```\n\nThe phrase `'Replace device'` appears twice in this algorithm.","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"75e8ca87-849b-4a09-a06b-f09ec50b48be","label":null,"content":"State the **two** possible sequences of user inputs (consisting of 'yes' or 'no') that would result in `'Replace device'` being output.","markscheme":"- Identifies the first sequence: 'yes' (followed by) 'no' B1\n- Identifies the second sequence: 'no' (followed by) 'yes' B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null}],"subjectCode":"gcse_computer_science__aqa","summaries":[{"id":"001d94a5-b069-44de-af3b-7403c7525797","difficultyBand":"medium","calculatorUse":null},{"id":"015b51d0-540a-4a9a-8e83-defb2b62fabe","difficultyBand":"medium","calculatorUse":null},{"id":"01873dd8-aa44-4000-98b0-7e831a05d415","difficultyBand":"hard","calculatorUse":null},

Representing algorithms

Question 38

Representing algorithms Questions

Representing algorithms

Question 38

Representing algorithms Questions