250+ Node Js MCQ With Online Practice Test

Node.js, often referred to as simply "Node," is a powerful open-source runtime environment that allows developers to execute JavaScript code outside of web browsers. It is designed for building scalable and efficient network applications, particularly on the server side. Node.js leverages a non-blocking, event-driven architecture, making it ideal for handling asynchronous operations and real-time applications. With its vast ecosystem of packages and modules available through npm (Node Package Manager), Node.js has become a popular choice for web development, microservices, APIs, and more, enabling developers to create high-performance applications with ease.

Practice Test

61. In Node.js, which core module is commonly used for file I/O operations?

A. fs B. io C. file D. read

62. What does "I/O" stand for in "File I/O" in Node.js?

A. Internal Output B. Input/Output C. Imitation Operation D. Immediate Output

63. Which method is used to read the contents of a file asynchronously in Node.js?

A. readFileSync B. readFileAsync C. fs.read D. fs.readFile

64. In Node.js, which method is used to write data to a file asynchronously?

A. writeFile B. fs.write C. writeFileSync D. fs.writeFile

65. When working with file I/O in Node.js, what is the primary purpose of the fs module's readFile method?

A. To create a new file B. To read the contents of an existing file asynchronously C. To delete a file D. To rename a file

66. Which callback function is commonly used with the fs.readFile method to handle errors during file reading in Node.js?

A. onSuccess B. onComplete C. onFailure D. callback

67. In Node.js, how is file data typically handled when using the fs.readFile method with the callback function?

A. As a string B. As binary data C. As an array of numbers D. As a JavaScript object

68. What is the primary purpose of the fs module's writeFile method in Node.js?

A. To create a new file B. To read a file asynchronously C. To write data to an existing file asynchronously D. To list all files in a directory

69. Which method is used to delete a file in Node.js?

A. fs.remove B. fs.deleteFile C. fs.unlink D. fs.delete

70. In Node.js, which method is used to check if a file exists?

A. fs.exists B. fs.checkFile C. fs.access D. fs.fileExists

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250+ Node Js MCQ With Online Practice Test

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