,"$L3f",null,{"backHref":"/gcse/computer-science/aqa/questions","basePath":"/gcse/computer-science/aqa/representing-algorithms/questions","formulaUrl":null,"initialIndex":33,"initialQuestionWindow":[{"id":"1b16b942-0c52-4d40-ba32-9ef9a06eb638","revisionId":"69794562-780b-4345-a60e-1e3eb1a1a739","questionNumber":null,"questionType":"LA","specification":"An array represents the status of a sequence of 7 weather sensors along a mountain trail. Each sensor can be either active (**A**) or idle (**I**).\n\n### Subroutines\n\n| Subroutine | Explanation |\n|---|---|\n| `INVERT(n)` | If the sensor at index \$n\$ is `A`, it is set to `I`. If it is `I`, it is set to `A`. |\n| `COPY_LST(n)` | The sensor at index \$n\$ is set to the same status as the sensor at index (\$n - 1\$). |\n| `RESET_RANGE(m, n)` | All sensors between index \$m\$ and index \$n\$ (but **not** including \$m\$ and \$n\$) are set to `I`. |\n\n### Initial State\n\n| 0 | 1 | 2 | 3 | 4 | 5 | 6 |\n|---|---|---|---|---|---|---|\n| I | A | A | I | A | I | I |","difficulty":3,"difficultyBand":"medium","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"d7e8b6e6-1cc9-4b8e-acb2-7ace6e0f391a","label":null,"content":"What will the array of sensors become after the following algorithm is executed?\n\n```text\np ← 2\nINVERT(p + 2)\nCOPY_LST(p - 1)\nINVERT(p + 1)\n```\n\nWrite your final answer in the table below:\n\n| 0 | 1 | 2 | 3 | 4 | 5 | 6 |\n|---|---|---|---|---|---|---|","markscheme":"- Correctly processes `INVERT(4)`, changing the status at index 4 from `A` to `I` (resulting in state: `[I, A, A, I, I, I, I]`) M1\n- Correctly processes `COPY_LST(1)`, copying the status of index 0 (`I`) to index 1 (resulting in state: `[I, I, A, I, I, I, I]`) M1\n- Correctly processes `INVERT(3)`, changing the status at index 3 from `I` to `A`, giving the final state `[I, I, A, A, I, I, I]` A1","marks":3,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"1b8b4a15-6a6f-48bb-b688-f47d51c07bb8","revisionId":"af50e9e0-b8a0-4df1-b454-dee1248ca3a9","questionNumber":null,"questionType":"LA","specification":"","difficulty":4,"difficultyBand":"medium","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"a97d4f4a-10a0-4f28-837b-66cee094133b","label":null,"content":"Complete the trace table for the algorithm shown in the flowchart below.\n\n![Flowchart depicting a looping algorithm](https://assets.mathsgenie.co.uk/aqa-qb/30828884-9d1d-4524-99b8-5af0cab02b80.png)\n\nYou may not need to use all the empty rows in the table.\n\n| A | B | C |\n|---|---|---|\n| | | |\n| | | |\n| | | |\n| | | |\n| | | |\n| | | |\n| | | |\n| | | |","markscheme":"- Correctly enters $A = 1$ and $B = 20$ in the first row, and $C = 17$ in the second row B1\n- Correctly enters $A = 2$ and $B = 17$ in the third row, and $C = 11$ in the fourth row M1\n- Correctly enters $A = 3$ and $B = 11$ in the fifth row, and $C = 2$ in the sixth row A1","marks":3,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"1d52e47a-f3a8-449c-bbd8-70ffb5596b2f","revisionId":"ff6f5881-f5bb-4fa9-9a57-d2067476520f","questionNumber":null,"questionType":"LA","specification":"","difficulty":5,"difficultyBand":"medium","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"cde000b3-e2d4-4138-8493-165e31d4791d","label":null,"content":"Complete the table below using the algorithm in the pseudocode block below, which calculates the booking cost for a co-working office space based on the number of hours booked and the number of team members attending.\n\n### Algorithm\n```text\nhours ← USERINPUT\nmembers ← USERINPUT\nbookingFee ← 45\nIF hours > 40 THEN\n baseCost ← hours * 12\nELSE\n IF hours ≥ 20 THEN\n baseCost ← hours * 15\n ELSE\n baseCost ← hours * 20\n

Representing algorithms

Question 14

Representing algorithms Questions

Representing algorithms

Question 14

Representing algorithms Questions