Explain what the `fs.readdir()` method is used for in Node.js.

Q: Explain what the `fs.readdir()` method is used for in Node.js.

const fs = require('fs'); fs.readdir('./my_directory', (err, files) => { if (err) { console.error(err); return; } console.log('Contents of the directory:', files); });

Difficulty: 3/10

directory listing, asynchronous I/O, error handling

The `fs.readdir()` method is used to read the contents of a directory. It returns an array of file and directory names present in the specified directory.

javascript

Scenario Questions

0-2 years experience

1How would you use fs.readdir to get a list of all files in a given folder and then log each filename?
2What will happen if you call fs.readdir on a path that doesn't exist? How would you handle that in code?

2-5 years experience

1You need to implement an endpoint that returns the names of all JSON files in a user‑provided directory, but you must ignore sub‑directories and handle large directories efficiently. Walk me through how you'd use fs.readdir and any additional steps.

Follow-up Questions

What edge cases would you test for when using fs.readdir?
How would you handle permission errors in production code?
Can you show a short snippet that uses the promise API?

Explain what the `fs.readdir()` method is used for in Node.js.

The fs.readdir() method is used to read the contents of a directory. It returns an array of file and directory names present in the specified directory.

Scenario Questions

Follow-up Questions

The `fs.readdir()` method is used to read the contents of a directory. It returns an array of file and directory names present in the specified directory.