Appending to files in Node.js - Cheat Sheet & Quick Revision

Recall & Review

beginner

What Node.js module is commonly used to append data to files?

The fs (file system) module is used to append data to files in Node.js.

beginner

What method in the fs module appends data to a file asynchronously?

The method fs.appendFile() appends data to a file asynchronously.

intermediate

How do you append text to a file synchronously in Node.js?

Use fs.appendFileSync(path, data) to append text synchronously.

intermediate

What happens if the file does not exist when using fs.appendFile()?

Node.js creates the file automatically and then appends the data.

beginner

Why is it important to handle errors when appending to files in Node.js?

Errors can occur due to permission issues, disk space, or invalid paths. Handling errors prevents crashes and helps debug problems.

Which method appends data to a file asynchronously in Node.js?

A fs.readFile()

B fs.writeFile()

C fs.open()

D fs.appendFile()

fs.appendFile() appends data asynchronously. fs.writeFile() overwrites files.

What does fs.appendFileSync() do?

A Reads a file synchronously

B Deletes a file synchronously

C Appends data to a file synchronously

D Creates a new file asynchronously

fs.appendFileSync() appends data to a file in a blocking, synchronous way.

If the file does not exist, what happens when you use fs.appendFile()?

A The file is created and data is appended

B An error is thrown

C Nothing happens

D The program crashes

Node.js creates the file automatically before appending data.

Which of these is NOT a reason to handle errors when appending files?

A Permission issues

B Faster file writing

C Invalid file paths

D Disk space problems

Handling errors helps with reliability, not speed.

Which module must you import to append files in Node.js?

A fs

B http

C path

D os

The fs module handles file system operations.

Explain how to append text to a file asynchronously in Node.js and what happens if the file does not exist.

Think about the fs module and its appendFile method.

Describe the difference between fs.appendFile() and fs.appendFileSync() in Node.js.

Consider how synchronous and asynchronous methods affect program flow.