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?

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