Node.js File System: Interactive Learning Quizzes for Full-Stack Web Development

Question 1

Which method in the Node.js File System module should you use to read data from a file asynchronously?

Accepted Answer

fs.readFile()

Answer

fs.read()

Answer

fs.readTextFile()

Answer

fs.readFileSync()

Question 2

What role does the ‘flags’ parameter play in the ‘fs.open()’ method?

Accepted Answer

Specifies the access mode for the file (e.g., read, write, append).

Answer

Determines the file's permissions.

Answer

Sets the encoding of the file contents.

Question 3

What is the key difference between ‘fs.rename()’ and ‘fs.renameSync()’?

Accepted Answer

‘fs.renameSync()’ is a synchronous method that blocks the event loop until the operation is complete, while ‘fs.rename()’ is asynchronous.

Answer

‘fs.rename()’ requires an additional callback function.

Question 4

Which event emitter object is used for monitoring file system events?

Accepted Answer

fs.watch()

Answer

fs.listen()

Answer

fs.on()

Answer

fs.observer()

Question 5

What is the purpose of the ‘encoding’ parameter in the ‘fs.readFile()’ method?

Accepted Answer

Specifies the encoding of the file contents (e.g., ‘utf8’, ‘hex’)

Answer

Sets the file's permissions.

Answer

Determines the file's modification date.

Question 6

Which method is used to retrieve information about a file or directory?

Accepted Answer

fs.stat()

Answer

fs.info()

Answer

fs.metadata()

Answer

fs.describe()

Question 7

What is the key distinction between ‘fs.exists()’ and ‘fs.existsSync()’?

Accepted Answer

‘fs.existsSync()’ is a synchronous method that blocks the event loop until the operation is complete, while ‘fs.exists()’ is asynchronous.

Answer

‘fs.exists()’ requires an additional callback function.

Question 8

Which method is used to create a symbolic link?

Accepted Answer

fs.symlink()

Answer

fs.junction()

Answer

fs.link()

Answer

fs.alias()

Question 9

Which method in the Node.js File System module is used to create a new directory?

Accepted Answer

mkdir()

Answer

rmdir()

Answer

readdir()

Answer

opendir()

Question 10

What is the name of the module required to interact with the file system in Node.js?

Accepted Answer

fs

Answer

path

Answer

http

Answer

os

Question 11

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

Accepted Answer

readFile()

Answer

writeFile()

Answer

appendFile()

Question 12

What is the default encoding used by the 'readFile()' method in Node.js?

Accepted Answer

utf8

Answer

binary

Answer

ascii

Answer

base64

Question 13

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

Accepted Answer

rename()

Answer

delete()

Answer

move()

Answer

copy()

Question 14

What is the purpose of the 'w' flag when opening a file for writing in Node.js?

Accepted Answer

Truncates the file if it exists

Answer

Creates a new file if it doesn't exist

Answer

Appends to the end of the file

Question 15

Which method in the Node.js File System module returns the current working directory?

Accepted Answer

cwd()

Answer

ls()

Answer

pwd()

Question 16

What is the purpose of the 'stat' function in the Node.js File System module?

Accepted Answer

Returns information about a file or directory

Answer

Reads the contents of a file

Answer

Creates a new file

Answer

Deletes a file

Question 17

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

Accepted Answer

unlink()

Answer

delete()

Answer

erase()

Answer

remove()

Question 18

To create a readable stream for a file using the Node.js File System API, which method should you use?

Accepted Answer

fs.createReadStream(filePath)

Answer

fs.createFileStream(filePath)

Answer

fs.openReadStream(filePath)

Answer

fs.readFileStream(filePath)

Question 19

Which method in the Node.js File System module is used to create a new directory?

Accepted Answer

mkdir()

Answer

open()

Answer

readdir()

Answer

writeFile()

Question 20

What is the purpose of the 'flags' parameter in the 'open()' method?

Accepted Answer

To specify the file access mode and other options

Answer

To specify the file contents

Answer

To specify the file name and extension

Answer

To specify the directory path

Question 21

What is the function of the 'stat()' method?

Accepted Answer

To retrieve information about a file or directory

Answer

To delete a file

Answer

To create a new file

Answer

To write data to a file

Question 22

Which method can be used to delete a file from the file system?

Accepted Answer

unlink()

Answer

erase()

Answer

remove()

Answer

delete()

Question 23

What is the purpose of the 'watch()' method?

Accepted Answer

To monitor changes in a file or directory

Answer

To write data to a file

Answer

To delete a file

Answer

To create a new file

Question 24

What is the purpose of the 'pipe()' method?

Accepted Answer

To connect streams and transfer data between them

Answer

To destroy a stream

Answer

To pause a stream

Answer

To create a new stream

Question 25

What is the role of the 'fs.constants' module in the Node.js File System?

Accepted Answer

To provide constant values for file access modes and flags

Answer

To handle file system errors

Answer

To define custom file system operations

Question 26

What is the purpose of the 'encoding' option when reading a file in Node.js?

Accepted Answer

To specify the character encoding of the file's contents

Answer

To compress the file's contents

Answer

To encrypt the file's contents

Question 27

What is the key difference between 'fs.unlink()' and 'fs.rmdir()' in Node.js?

Accepted Answer

fs.unlink() deletes a file while fs.rmdir() deletes a directory

Answer

fs.unlink() creates a file while fs.rmdir() creates a directory

Answer

fs.unlink() reads a file while fs.rmdir() writes to a file

Question 28

Which Node.js File System method is used to verify the existence of a file or directory?

Accepted Answer

fs.exists()

Answer

fs.isPresent()

Answer

fs.isThere()

Answer

fs.isfile()

Question 29

What is the significance of the 'flags' option when opening a file in Node.js?

Accepted Answer

To specify the mode in which the file is opened

Answer

To encrypt the file's contents

Answer

To compress the file's contents

Answer

To set permissions on the file

Question 30

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

Accepted Answer

fs.rename()

Answer

fs.changeName()

Answer

fs.editName()

Answer

fs.updateName()

Question 31

What is the purpose of the 'fs.watchFile()' method in Node.js?

Accepted Answer

To monitor a file for changes

Answer

To delete a file

Answer

To read the contents of a file

Answer

To create a new file

Question 32

What is the purpose of the 'fs.stat()' method in Node.js?

Accepted Answer

To retrieve information about a file or directory

Answer

To create a new file or directory

Answer

To delete a file or directory

Answer

To read the contents of a file or directory

Question 33

What is the main purpose of the 'flags' parameter in the fs.open() method?

Accepted Answer

To specify the mode in which the file should be opened (e.g., read-only, write-only, append, etc.)

Answer

To set the encoding of the file

Answer

To determine the buffer size for the file

Question 34

Which method in the Node.js File System module is specifically designed to read the contents of a file asynchronously?

Accepted Answer

fs.readFile()

Answer

fs.readStream()

Answer

fs.read()

Answer

fs.readFileSync()

Question 35

What is the key difference between the fs.truncate() and fs.ftruncate() methods in Node.js?

Accepted Answer

fs.truncate() operates on the file path, while fs.ftruncate() operates on the file descriptor

Answer

fs.truncate() is synchronous, while fs.ftruncate() is asynchronous

Answer

fs.truncate() can only truncate files, while fs.ftruncate() can truncate directories

Question 36

What is the specific role of the 'recursive' parameter in the fs.rmdir() method?

Accepted Answer

To specify whether subdirectories should also be removed

Answer

To determine the maximum depth of subdirectories to remove

Answer

To set the permissions of the directory after removal

Question 37

Which method in the Node.js File System module is primarily used to obtain file and directory information?

Accepted Answer

fs.stat()

Answer

fs.info()

Answer

fs.fstat()

Answer

fs.lstat()

Question 38

What is the primary purpose of the 'encoding' parameter in the fs.outputFile() method?

Accepted Answer

To specify the character encoding of the output file

Answer

To determine the maximum file size

Answer

To set the file permissions

Question 39

Which File System module method can be used to monitor changes in a file or directory?

Accepted Answer

fs.watch()

Answer

fs.observe()

Answer

fs.monitor()

Answer

fs.listen()

Question 40

Which method is used to create a new directory?

Accepted Answer

mkdir()

Answer

makeDir()

Answer

createDirectory()

Answer

newDir()

Question 41

Which event is emitted when a file is successfully closed?

Accepted Answer

close

Answer

open

Answer

finish

Answer

end

Question 42

What is the primary function of the fs.readFileSync() method?

Accepted Answer

Synchronously reads the complete contents of a file into a buffer.

Answer

Synchronously reads a portion of a file into a variable.

Answer

Asynchronously reads the complete contents of a file into a variable.

Answer

Asynchronously reads a portion of a file into a buffer.

Question 43

How can you modify the permissions of a file?

Accepted Answer

fs.chmod()

Answer

fs.access()

Answer

fs.changePermissions()

Answer

fs.owner()

Question 44

What is the primary purpose of the Node.js File System module?

Accepted Answer

Provides an interface for interacting with the file system.

Answer

Handles HTTP requests and responses.

Answer

Parses and manipulates JSON data.

Answer

Manages database connections and operations.

Question 45

Which method is used to delete a file from the file system?

Accepted Answer

fs.unlink()

Answer

fs.delete()

Answer

fs.unlinkSync()

Answer

fs.remove()

Question 46

Which event is triggered when a file is successfully opened?

Accepted Answer

open

Answer

create

Answer

read

Answer

close

Question 47

What is the function of the fs.renameSync() method?

Accepted Answer

Synchronously renames a file or directory.

Answer

Asynchronously renames a file or directory.

Answer

Renames multiple files or directories asynchronously.

Answer

Renames multiple files or directories synchronously.

Question 48

Which Node.js module provides functionalities for interacting with the file system?

Accepted Answer

`fs`

Answer

`system`

Answer

`file`

Answer

`os`

Question 49

What is the correct way to read the contents of a file named 'data.txt' asynchronously using the `fs` module?

Accepted Answer

`fs.readFile('data.txt', 'utf8', (err, data) => { ... });`

Answer

`fs.read('data.txt', 'utf8', (err, data) => { ... });`

Answer

`fs.readFile('data.txt', (data) => { ... });`

Question 50

Which method is used to write data to a file synchronously using the `fs` module?

Accepted Answer

`fs.writeFileSync()`

Answer

`fs.appendFileSync()`

Answer

`fs.writeFile()`

Answer

`fs.writeSync()`

Question 51

What does the following code snippet do?

```javascript
fs.appendFile('log.txt', 'New entry
', (err) => {});
```

Accepted Answer

Appends 'New entry
' to the file 'log.txt' if it exists, otherwise creates the file and writes the content.

Answer

Overwrites the content of 'log.txt' with 'New entry
'.

Question 52

How can you rename a file named 'old.txt' to 'new.txt' using the `fs` module?

Accepted Answer

`fs.rename('old.txt', 'new.txt', (err) => {});`

Answer

`fs.copy('old.txt', 'new.txt', (err) => {});`

Answer

`fs.move('old.txt', 'new.txt', (err) => {});`

Answer

`fs.replace('old.txt', 'new.txt', (err) => {});`

Question 53

What does the following code do?

```javascript
const stats = fs.statSync('file.txt');
console.log(stats.isFile());
```

Accepted Answer

Prints `true` if 'file.txt' is a file, `false` otherwise.

Answer

Prints the size of the file 'file.txt'.

Answer

Prints the content of the file 'file.txt'.

Question 54

How can you create a directory named 'new_dir'?

Accepted Answer

`fs.mkdir('new_dir', (err) => {});`

Answer

`fs.makeDir('new_dir', (err) => {});`

Answer

`fs.createDirectory('new_dir', (err) => {});`

Answer

`fs.newDirectory('new_dir', (err) => {});`

Question 55

What is the purpose of the `__dirname` global variable in Node.js when working with the file system?

Accepted Answer

It provides the absolute path of the directory containing the currently executing file.

Answer

It holds the command line arguments passed to the Node.js process.

Answer

It contains the file name of the currently executing script.

Question 56

What is a potential issue with using synchronous file system methods in a Node.js web server?

Accepted Answer

They can block the event loop, making the server unresponsive to other requests.

Answer

They are not supported in modern Node.js versions.

Answer

They are less efficient than asynchronous methods for handling large files.