Tech_updates

Tech_updates

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Tech_updates
Tech_updates
May 23, 2025 at 02:09 PM
*Web Development Interview Questions* *HTML Interview Questions* 1. What is HTML? 2. What does DOCTYPE mean in HTML? 3. Explain the purpose of the tag. 4. What is the difference between HTML and XHTML? 5. What is semantic HTML? 6. Describe the difference between
and . 7. Explain the use of the element. 8. What are data attributes in HTML5? 9. What is the purpose of the alt attribute in the tag? 10. How do you create a hyperlink in HTML? 11. What is the purpose of the tag in HTML? 12. Explain the difference between
    and
      elements. 13. What is the significance of the lang attribute in HTML? 14. What is the purpose of the
      element in HTML? 15. How does the target attribute work in HTML forms? *CSS Interview Questions* 16. What is CSS and what does it stand for? 17. Explain the difference between inline, block, and inline-block elements. 18. Describe the box model in CSS. 19. What is the purpose of the clear property in CSS? 20. Explain the difference between position: relative; and position: absolute;. 21. What is the CSS selector specificity and how is it calculated? 22. How can you center an element horizontally and vertically using CSS? 23. Explain the purpose of the float property in CSS. 24. Describe the difference between padding and margin. 25. How does the display: none; property differ from visibility: hidden;? 26. What is a CSS preprocessor, and why might you use one? 27. What is the "box-sizing" property in CSS? 28. How do you include external stylesheets in HTML? 29. What is the difference between em and rem units in CSS? 30. How does the z-index property work in CSS? *JavaScript Interview Questions* 31. What is JavaScript? 32. Explain the difference between let, const, and var in JavaScript. 33. Describe hoisting in JavaScript. 34. What is the purpose of the this keyword in JavaScript? 35. What are closures in JavaScript? 36. Explain the concept of prototypal inheritance in JavaScript. 37. How does event delegation work in JavaScript? 38. Describe the difference between == and === in JavaScript. 39. What is the purpose of the async keyword in JavaScript? 40. How do you handle errors in JavaScript? 41. Explain the concept of callback functions. 42. What is the difference between null and undefined in JavaScript? 43. Describe the role of the bind method in JavaScript. 44. What is the purpose of the map function in JavaScript? 45. Explain the concept of promises in JavaScript. 46. What is the event loop in JavaScript? 47. Describe the difference between null, undefined, and undeclared in JavaScript. 48. How do you create an object in JavaScript? 49. Explain the purpose of the localStorage and sessionStorage objects. 50. How does the typeof operator work in JavaScript? *HTML, CSS, and JavaScript Integration Questions:-* 51. How do you link a JavaScript file to an HTML file? 52. What is the purpose of the defer attribute in a script tag? 53. Explain how to include an external CSS file in an HTML document. 54. What is the importance of the viewport meta tag in responsive design? 55. Describe the purpose of the @media rule in CSS. 56. How do you include external JavaScript libraries in your project? 57. Explain the purpose of the declaration in HTML5. 58. How can you optimize website performance using CSS and JavaScript? 59. What is the purpose of the lang attribute in the