What is the term for developing two separate sites, one for desktop and one for mobile?

• A. Mobile web design
• B. Responsive design
• C. Adaptive design
• D. Progressive enhancement

Answer: (A)

Adaptive design is used when there are multiple fixed layouts, each optimized for a different device category, and the chosen layout is delivered based on the user’s device. This approach creates two separate experiences—one for desktop and one for mobile—so each version can be tailored for its specific form factor and performance. This differs from responsive design, which uses a single layout that fluidly reflows to fit any screen size. Mobile web design is a broad term about designing for mobile and doesn’t inherently imply maintaining two separate versions. Progressive enhancement focuses on delivering a baseline experience to all users and then adding enhancements for capable devices, rather than maintaining distinct site versions.