Accessibility Interview Questions

Web Accessibility Interview Questions & Answers

Accessibility is one of the most frequently tested topics in frontend, React, Angular, Vue, Web Components, Full Stack, and UI Architect interviews. Employers expect developers to understand WCAG, semantic HTML, keyboard accessibility, ARIA, screen readers, accessible forms, testing, and accessibility best practices.

This guide contains interview questions categorized for Junior, Senior, and Architect-level developers along with concise answers suitable for technical interviews.

Junior Developer Interview Questions

• 1. What is Web Accessibility?

  Web accessibility ensures websites can be used by everyone, including people with visual, hearing, motor, and cognitive disabilities.

• 2. What does WCAG stand for?

  Web Content Accessibility Guidelines. They define international standards for building accessible websites.

• 3. What are the four WCAG principles?

  Perceivable, Operable, Understandable, and Robust (POUR).

• 4. Why is semantic HTML important?

  Semantic HTML improves screen reader support, SEO, keyboard navigation, and browser compatibility.

• 5. What is alternative text?

  Alternative text describes informative images for screen reader users.

• 6. When should alt="" be used?

  For decorative images that do not convey meaningful information.

• 7. Why are labels important in forms?

  Labels identify form controls for both visual users and assistive technologies.

• 8. What is keyboard accessibility?

  Every interactive element should be usable without a mouse.

• 9. What is focus?

  Focus identifies the currently active element when navigating with the keyboard.

• 10. Name two accessibility testing tools.

  Lighthouse and axe DevTools.

Senior Developer Interview Questions

• 1. When should ARIA be used?

  Only when semantic HTML cannot provide the required accessibility.

• 2. Explain keyboard focus management.

  Focus should move logically, remain visible, and return appropriately after dialogs or modals close.

• 3. What is a keyboard trap?

  A situation where keyboard users cannot move focus away from an element.

• 4. Explain aria-live.

  It announces dynamic content updates to screen readers without requiring focus changes.

• 5. What is the difference between role="button" and button?

  Native button elements already include keyboard support and accessibility. ARIA roles require additional implementation.

• 6. How do you test accessibility?

  Combine automated tools, keyboard testing, screen readers, browser inspectors, and manual WCAG reviews.

• 7. Explain color contrast requirements.

  Normal text should have at least a 4.5:1 contrast ratio according to WCAG AA.

• 8. Why shouldn't placeholder text replace labels?

  Placeholders disappear while typing and are not a replacement for accessible labels.

• 9. How do screen readers navigate pages?

  Using headings, landmarks, links, buttons, forms, and semantic HTML.

• 10. What are the most common accessibility mistakes?

  Missing labels, poor color contrast, incorrect ARIA, inaccessible custom components, and lack of keyboard support.

Architect Interview Questions

• 1. How would you implement accessibility across an enterprise design system?

  Build accessible components by default, document WCAG compliance, automate testing, and enforce accessibility during code reviews.

• 2. How do you scale accessibility across multiple teams?

  Create reusable accessible components, shared guidelines, CI/CD testing, accessibility champions, and continuous training.

• 3. How do you enforce accessibility in CI/CD?

  Integrate Lighthouse, axe-core, Playwright, Cypress, and HTML validation into automated pipelines.

• 4. How do you balance accessibility and performance?

  Use semantic HTML, lazy loading, optimized assets, progressive enhancement, and accessible JavaScript patterns.

• 5. What accessibility metrics do you monitor?

  WCAG violations, Lighthouse scores, keyboard coverage, screen reader compatibility, and accessibility regression tests.

• 6. How would you review an accessibility audit?

  Prioritize critical blockers, categorize by WCAG success criteria, assign owners, and verify fixes with manual testing.

• 7. How do you build accessible React or Angular components?

  Prefer native HTML, manage focus correctly, expose keyboard interactions, minimize ARIA, and include accessibility tests.

• 8. How do you ensure accessibility in micro frontends?

  Share common accessibility standards, reusable UI components, linting rules, testing frameworks, and governance across teams.

• 9. What is your accessibility strategy for enterprise applications?

  Include accessibility during design, development, testing, deployment, monitoring, and ongoing maintenance.

• 10. Why is accessibility important for business?

  Accessibility improves usability, SEO, legal compliance, customer satisfaction, and expands the audience while reducing long-term maintenance costs.