IGCSE taster: an exam-style scenario question · Year 9 Project, lesson 6 · KS3 Computing

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IGCSE taster: an exam-style scenario question (assessed)

Year 9 · Project: design, build, test · Lesson 6 of 6Unplugged

What you'll learn

Read an exam scenario and pick out the inputs, processes and outputs
Write an algorithm in pseudocode or Python that meets every requirement
Choose test data and spot an error in an algorithm

Open the slides

IGCSE taster: an exam-style scenario question (assessed)

Year 9 · Project: design, build, test · Lesson 6 of 6Unplugged

NameFormDate

Exam-style scenario question (20 marks)

A. Read the scenario (5 marks)

Scenario: A school runs a step challenge. A program records the number of steps a pupil walks on each of 7 days. Each value must be between 0 and 30000 inclusive. The program must: input and validate the steps for each day; calculate and output the total and the average steps; count and output the number of days with 10000 or more steps; output 'Target met' if that count is 5 or more, otherwise 'Keep going'.
Name the type of validation check needed for the steps. (1 mark)
Give one value of each type of test data for the steps: normal, extreme, abnormal. Say if each is accepted or rejected. (3 marks)
Why must Total be set to 0 before the loop starts? (1 mark)

B. Write the algorithm (10 marks)

Write an algorithm in pseudocode or Python for the step challenge program. Use meaningful variable names.
Space for working.

C. Find the error (3 marks)

This part of another pupil's answer has a logic error. Identify the line, correct it, and give a test value that would show the error.
```
Count ← 0
FOR Day ← 1 TO 7
   INPUT Steps
   IF Steps > 10000 THEN
      Count ← Count + 1
   ENDIF
NEXT Day
```

D. Improve (2 marks)

Describe one improvement to the program and explain how it helps the pupil using it.

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