Questions
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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.mkdir()` method in Node.js, and how can you create directories with it?

The fs.mkdir() method is used to create directories in Node.js. It takes the directory path as an argument and an optional callback function to handle errors. Here's an example:

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