OCR J277/02 – 2.3 – Producing robust programs

Posted on by Administrator Posted in J277 - Computer Science GCSE (OCR)
2.3 – Producing robust programs - Overview / Checklist
2.3.1 Defensive design
Defensive design considerations:

    Anticipating misuse
    Authentication

Input validation
Maintainability:

    Use of sub programs
    Naming conventions
    Indentation
    Commenting
2.3.2 Testing
The purpose of testing
Types of testing:

    Iterative
    Final/terminal

Identify syntax and logic errors
Selecting and using suitable test data:

    Normal
    Boundary
    Invalid/Erroneous

Refining algorithms

Recommended Resources

2.3.1 Defensive design

Data Validation Quiz

Boarding Pass Validation

Yes or No!

Flowchart to Python Code – Star Rating Validation

Code Maintainability Q&A


2.3.2 Testing

Find the Logic Error

Refining Algorithms – Q&A

Debugging and refining an algorithm – Q&A


Further Reading…

Extra Resources
Credit Card Validation Algorithm Check digit validation on a barcode

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