Start with automated tools to catch the obvious issues, then test manually with keyboard-only navigation and a screen reader. Prioritise fixes by user impact, not just WCAG level.
Strong answers describe a systematic process: automated scanning first (axe, Lighthouse), then manual keyboard and screen reader testing, mapping issues to WCAG success criteria and severity, prioritising by user impact and legal risk, and creating a remediation roadmap. Best candidates discuss quick wins versus structural fixes.
Tests depth of accessibility practice. Designers who only run Lighthouse are scratching the surface. Those who can conduct a thorough manual audit and prioritise remediation demonstrate mature accessibility practice.