Accessibility testing should be part of development workflow.
Automated testing:
- axe, Lighthouse, WAVE browser extensions
- eslint-plugin-jsx-a11y for linting
- Catches ~% of issues
Manual testing:
- Navigate with keyboard only
- Use screen reader
- Zoom to %
- Disable images
User testing:
- Include users with disabilities
- Real assistive technology usage
Interview tip: Mention both automated and manual testing. Automation alone isn't enough.