1. Basic
    1. HTML Basics
      1. What is HTML? Explain its purpose and structure.
      2. What are the different versions of HTML, and how do they differ?
      3. Explain the DOCTYPE declaration in HTML5.
      4. What are void elements in HTML?
      5. What are the different types of tags in HTML?
      6. Explain the difference between HTML and XHTML.
    2. HTML Semantic Elements
      1. What are semantic HTML elements? Why are they important?
      2. Give examples of semantic HTML elements and their purposes.
      3. How do semantic elements improve accessibility and SEO?
    3. HTML5 Features
      1. What are the new features introduced in HTML5?
      2. Explain the <video> and <audio> elements in HTML5.
      3. What is the Canvas element in HTML5 used for?
      4. How does HTML5 support offline web applications?
    4. Forms and Input Elements
      1. Explain the purpose of the <form> element in HTML.
      2. Describe different types of input elements in HTML.
      3. What is the difference between the <input> and <textarea> elements?
      4. How can you create a dropdown list in HTML?
    5. HTML Accessibility
      1. What is accessibility in web development?
      2. Explain the importance of using semantic HTML for accessibility.
      3. How can you improve the accessibility of images in HTML?
    6. HTML Best Practices
      1. What are some best practices for writing clean and maintainable HTML code?
      2. How can you optimize HTML for performance?
      3. Explain the importance of using external CSS and JavaScript files.
    7. HTML Meta Tags
      1. What are meta tags in HTML? Give examples.
      2. How do meta tags affect SEO?
      3. Explain the purpose of the viewport meta tag.
    8. HTML5 APIs
      1. What are HTML5 APIs?
      2. Explain the Geolocation API in HTML5.
      3. How can you use the localStorage and sessionStorage APIs in HTML5?
    9. HTML5 Web Storage
      1. What is HTML5 Web Storage? How does it differ from cookies?
      2. Explain the localStorage and sessionStorage objects in HTML5.
    10. HTML Templating
      1. What is HTML templating?
      2. Explain the role of templating engines in front-end development.
      3. Give examples of popular HTML templating engines.
    11. HTML Validation
      1. Why is HTML validation important?
      2. How can you validate HTML code?
      3. Explain the role of W3C in HTML validation.
    12. HTML Media Elements
      1. Explain the <img> element in HTML.
      2. How can you embed videos using the <video> element?
      3. What is the <audio> element used for?
    13. HTML Tables
      1. How can you create tables in HTML?
      2. Explain the <table>, <tr>, <td>, and <th> elements.
      3. What are colspan and rowspan attributes used for in HTML tables?
    14. HTML5 Semantic Markup
      1. Explain the semantic meaning of <header>, <footer>, <nav>, <article>, and <section> elements in HTML5.
      2. How do these elements improve the structure and readability of HTML code?
    15. HTML CSS Integration
      1. Explain the <link> and <style> elements in HTML for linking external CSS and embedding CSS styles.
      2. How can you use inline styles in HTML?
  2. Advance
    1. HTML5 Features
      1. Explain the <canvas> element in HTML5 in detail. How can it be used for drawing graphics?
      2. Describe the new form input types introduced in HTML5 (e.g., email, tel, url, date, etc.). How do they improve user experience?
      3. How does HTML5 support responsive web design? Explain the role of media queries and viewport meta tag.
    2. HTML Accessibility
      1. Provide examples of ARIA (Accessible Rich Internet Applications) roles and attributes and explain how they enhance accessibility.
      2. How can you ensure that your website is accessible to users with disabilities? Discuss techniques such as keyboard navigation, focus management, and ARIA landmarks.
    3. HTML Best Practices
      1. Discuss strategies for optimizing HTML for search engines and improving SEO.
      2. How can you ensure cross-browser compatibility when writing HTML code?
      3. Explain the importance of semantic HTML for search engine optimization and screen readers.
    4. HTML Meta Tags
      1. Discuss the impact of meta tags such as title, description, and keywords on search engine rankings.
      2. How can you optimize meta tags for social media sharing (Open Graph protocol, Twitter Cards, etc.)?
    5. HTML5 APIs
      1. Explain the Web Storage API in HTML5 in detail. Compare localStorage and sessionStorage and discuss their appropriate use cases.
      2. How does the Geolocation API work in HTML5? What are its limitations and privacy considerations?
    6. HTML Validation
      1. Describe the role of HTML validators and linting tools in ensuring code quality and standards compliance.
      2. How can you integrate HTML validation into the development workflow (e.g., using tools like W3C Validator, HTMLHint, etc.)?
    7. HTML Media Elements
      1. Discuss best practices for optimizing images in HTML for performance and responsiveness.
      2. How can you implement lazy loading for images in HTML to improve page load times?
    8. HTML CSS Integration
      1. Explain the concept of critical rendering path and how it impacts the loading and rendering of CSS in HTML.
      2. Discuss techniques for optimizing CSS delivery, such as minification, concatenation, and using CSS preprocessors like Sass or Less.
    9. HTML Templating
    10. HTML Forms and Input Elements
  3. Interview Questions