Syllabus Point
- Explain the contribution of back-end engineering to the success and ease of software development
Including:
- technology used
- error handling
- interfacing with front end
- security engineering
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Technology used
Back end engineering relies on technologies that power data processing and business logic
- Languages: JavaScript (Node.js), Python, PHP, Ruby, Go, Java
- Databases: MySQL, PostgreSQL, MongoDB, SQLite
- Frameworks: Express (Node.js), Flask (Python), Spring Boot (Java)
- APIs: RESTful APIs, GraphQL for data communication
Error handling
Back-end systems are responsible for detecting, logging, and managing errors in a way that does not disrupt the user experience.
- Try/catch blocks, error codes, and meaningful messages help debug issues.
- Error handling ensures system resilience and reliability.
- Logs are generated to monitor and fix bugs, improving system maintenance.
Interfacing with front end
Back-end provides data and services to the front end through APIs:
- REST APIs allow front-end apps to send and retrieve data securely.
- JSON or XML formats are used for communication.
- Input received from the user via the front end is validated, processed, and stored in the back end.
Security engineering
Back-end handles the core security mechanisms in software systems:
- Authentication and authorisation: Verifying user identities and permissions.
- Data validation: Preventing malicious input (e.g., SQL injection, XSS).
- Encryption: Protecting data in transit (HTTPS) and at rest (hashed passwords).
- Access control: Ensuring data privacy through role-based permissions.
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