Questions
4 of 16
1How do you read a file synchronously in Node.js?
2How do you read a file asynchronously in Node.js?
3Explain how to write to a file in Node.js?
4What is the purpose of the `fs.exists()` method in Node.js?
5How can you delete a file in Node.js?
6What is the purpose of the `fs.createReadStream()` and `fs.createWriteStream()` methods in Node.js?
7How can you check if a given path is a file or a directory in Node.js?
8Explain the difference between `fs.readFile()` and `fs.createReadStream()` for reading files in Node.js.
9How can you append data to an existing file in Node.js?
10How can you recursively list all files and directories in a given directory using Node.js?
11What is the purpose of the `fs.mkdir()` method in Node.js, and how can you create directories with it?
12How can you rename a file or directory in Node.js?
13Explain what the `fs.readdir()` method is used for in Node.js.
14What is the purpose of the `fs.rmdir()` method in Node.js, and how can you delete a directory with it?
15What is the difference between `fs.unlink()` and `fs.unlinkSync()` in Node.js?
16How can you watch for file changes in a directory using Node.js?
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What is the purpose of the `fs.exists()` method in Node.js?

The fs.exists() method is used to check if a file or directory exists at a given path. It takes a path as an argument and invokes a callback function with a boolean value indicating whether the path exists or not.

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