Which SDLC phase involves bug fixing and handling enhancement requests?

• A. Design
• B. Maintenance
• C. Deployment
• D. Testing

Answer: (B)

Bug fixing and handling enhancement requests happen during the ongoing support phase after a product is in use. This maintenance phase focuses on keeping the software reliable and up-to-date by fixing defects reported by users and implementing requested improvements or new features in controlled updates.

The design phase is about planning the structure and components before coding, so it isn’t where post-release fixes and requests are handled. Deployment is the act of releasing software to users, which is earlier than maintenance, though fixes may be deployed during maintenance. Testing is about verifying quality before or during releases, whereas the ongoing bug fixes and feature requests are the core activities of maintenance.