51. What is asynchronous programming in Node.js?
Answer:A programming style that allows non-blocking execution of tasks, often involving callbacks or promises
52. In Node.js, why is asynchronous programming important for handling I/O operations?
Answer:It allows the program to continue executing other tasks while waiting for I/O operations to complete, avoiding blocking.
53. What is a callback function in the context of asynchronous programming in Node.js?
Answer:A function passed as an argument to another function, which is executed later when a specific task is complete
54. What does the "Callback Hell" or "Pyramid of Doom" refer to in Node.js?
Answer:A situation where nested callbacks result in unreadable and hard-to-maintain code
55. What is a Promise in Node.js?
Answer:An object representing a future result of an asynchronous operation, which can be in a resolved or rejected state
56. In a Promise, what does the "resolve" state indicate?
Answer:Successful completion of an asynchronous operation
58. What is the purpose of the async and await keywords in Node.js?
Answer:To simplify working with Promises and writing asynchronous code in a more linear fashion
59. How does the Node.js Event Loop coordinate asynchronous operations?
Answer:By executing them sequentially, one after the other
60. What is a common use case for asynchronous programming in Node.js?
Answer:Processing large datasets
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