1. What is the difference between HTML4 and HTML5?
2. How do you use the <canvas> element for graphics in HTML?
3. What are data attributes in HTML, and how are they used?
4. How do you create a responsive layout using CSS Grid in conjunction with HTML?
5. What is the role of the <template> tag in HTML?
6. How do you embed a Google Map in your HTML page?
7. What is the purpose of the <dialog> tag in HTML5?
8. How do you use ARIA roles to improve accessibility in HTML?
9. What is the <picture> element, and when would you use it?
10. How do you implement a custom HTML element using Web Components?
11. What is the purpose of the <track> element in HTML5 video?
12. How do you create a multi-column layout using HTML and CSS?
13. What is the difference between <section> and <article> tags in HTML?
14. How do you handle form validation using the Constraint Validation API in HTML5?
15. What are semantic HTML elements, and why are they important?
16. How do you create an HTML5 application manifest for a web app?
17. What is the purpose of the data-* attributes in HTML?
18. How do you implement lazy loading for images in HTML?
19. What is the <base> tag in HTML, and how does it affect links?
20. How do you create an HTML form that supports file uploads?
21. What are the advantages of using <svg> over <img> for graphics?
22. How do you create a modal dialog using HTML and CSS?
23. What does the rel attribute specify in link tags?
24. How can you create a custom checkbox using HTML and CSS?
25. What are the differences between <link> and <script> tags?
26. How do you use the datalist element in HTML?
27. What are microdata and how do you implement them in HTML?
28. How do you create an interactive image map in HTML?
29. What is the function of the <noscript> tag in HTML?
30. How do you implement responsive images using the srcset attribute?
31. What is the role of the contenteditable attribute in HTML?
32. How do you use the <progress> tag to show completion?
33. What is the <main> tag in HTML, and when should it be used?
34. How do you create an HTML form with multiple input types?
35. What is the significance of the <fieldset> and <legend> tags in forms?
36. How do you create a table with responsive design in HTML?
37. What are <meta> tags, and why are they important for SEO?
38. How do you use the sandbox attribute with <iframe>?
39. What is the difference between <strong> and <b> in HTML?
40. How do you implement an HTML5 offline web application?