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Client brief: “The school fair needs a quick ticket system. It must prevent queues, work for everyone, store no personal data, remember every booking and be completely secure. It needs to be ready next week.”

Produce

• Purpose, scope and boundaries
• IPO analysis
• Six testable functional requirements
• Questions and assumptions log
• Methodology recommendation

Design a program that accepts seven daily temperatures, displays the maximum, counts days below 5°C and identifies the first day matching a temperature entered by the user. Do not write Python yet.

Produce

• Hierarchical structure diagram
• Data flow with only necessary parameters
• Detailed pseudocode refinements
• Input/output wireframe
• Requirement-to-design traceability table

Begin with three parallel arrays holding book titles, authors and loan status. Refactor the program to use a @dataclass record and an array of records. The original and refactored programs must produce identical results for the same data.

titles = ["Dune", "Noughts & Crosses", "The Hobbit"]
authors = ["Frank Herbert", "Malorie Blackman", "J. R. R. Tolkien"]
on_loan = [True, False, True]

Produce

• Original working version
• @dataclass record definition
• Refactored version
• Before-and-after test evidence
• Specific maintainability evaluation

Create a toolkit containing functions for linear search, maximum, minimum and count occurrences. Global variables are forbidden. Each subprogram may receive only the data it genuinely needs.

Produce

• Top-level design
• Four working functions
• Purpose and parameter contract for each
• Independent test calls
• Explanation of parameter choices

A sports-club membership file contains blank lines, duplicate identifiers, invalid numbers and incomplete records. Read the file, preserve every valid record, reject invalid rows safely and write both a clean file and an error report.

Download starter file

Produce

• Input-file format description
• Array of member records
• Clean output file
• Error report with reasons
• Comprehensive test table

Modify linear search so it returns both the matching position and the number of comparisons made. Construct datasets that demonstrate the best case, a middle match, the last-position match and an absent value.

Produce

• Instrumented search function
• Four deliberate datasets
• Results table
• Explanation of the pattern
• Prediction for 1,000 items

The function below is intended to count scores at or above a supplied threshold. It contains more than one logic defect. Design tests before changing the code, predict the correct results, expose each defect and record every correction in a fault log.

def count_at_least(scores, threshold):
    count = 1
    for position in range(0, len(scores) - 1):
        if scores[position] > threshold:
            count = count + 1
    return count

Produce

• Test plan with justification
• Actual faulty results
• Trace or breakpoint evidence
• Corrected function
• Fault log linking tests to fixes

Improve these statements: “The program is robust because it works.” “It is efficient because it uses functions.” “It is maintainable because the variable names are good.” Each replacement must make a judgement, cite named evidence and explain its effect.

Produce

• Three diagnosed weak claims
• Three evidence-based replacements
• One limitation or counter-example
• A repeatable evaluation sentence frame

Create a small event-entry system that loads entrant records, searches by identifier, counts entrants in a selected category and writes a results file. After the first working version, obtain a change card from your teacher.

Produce

• Analysis and functional requirements
• Structure diagram and refinements
• Modular implementation
• Comprehensive test plan
• Change-impact log and evaluation

Write an original SDD question worth 8–12 marks. It must combine at least three of: analysis, data flow, implementation, testing, debugging or evaluation. Then produce a marking scheme and moderate another pupil's answer.

Produce

• Unambiguous scenario and question
• Mark allocation
• Complete model response
• Two plausible wrong responses
• Moderation note after peer trial