GCSE
Computer Science
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Introduction to GCSE Computer Science -
1.1 Systems Architecture -
1.2 Memory and Storage -
1.3 Computer Networks, Connections and Protocols -
1.4 Network Security -
1.5 Systems Software -
1.6 Ethical, Legal, Cultural and Environmental Impacts of Digital Technology -
2.1 Algorithms -
2.2 Programming Fundamentals -
2.3 Producing Robust Programs -
2.4 Boolean Logic -
2.5 Programming Languages and Integrated Development Environments
1. Computer Systems
2.3.1 Defensive Design
In this lesson, we will focus on defensive design considerations and maintainability techniques that will help you develop programs that are resilient, secure, and easy to maintain.
Defensive Design Considerations
Defensive design is a crucial aspect of software development that focuses on anticipating potential issues and ensuring a program can handle unexpected situations effectively. The goal is to make software robust, secure, and user-friendly, preventing misuse while maintaining system integrity.
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Create a free accountDefensive Design
- Defensive design anticipates misuse, ensuring the program handles invalid or unexpected input without crashing.
- Input validation checks data type, format, range, and presence to prevent errors and improve user experience.
- Authentication methods, like passwords and multi-factor authentication (MFA), protect access to sensitive features and data.
- Error handling should be user-friendly and informative, guiding users to correct mistakes.
- Maintainability is improved through subprograms, meaningful naming, indentation, and commenting.
- Sanitising inputs prevents security risks such as SQL injection.