Automated tools catch about 30% of accessibility issues. Manual testing with a screen reader and keyboard-only navigation catches the rest. You need both.
Strong answers cover: automated tools (axe, Lighthouse, WAVE), manual testing (keyboard navigation, screen reader testing), WCAG compliance levels, and including accessibility in the definition of done. Best candidates discuss how accessibility testing is integrated into the development process, not just done at the end.
Increasingly important skill. Accessibility is a legal requirement in many jurisdictions. Candidates with accessibility testing experience are valuable. Ask about specific WCAG criteria they test against.