path.resolve for absolute paths in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the path module.

Node.js

const path = require('[1]');

Drag options to blanks, or click blank then click option'

Apath

Bfs

Chttp

Durl

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'fs' instead of 'path' to import the path module.

Forgetting to import the module before using it.

The path module is used to work with file and directory paths in Node.js.

2fill in blank

medium

Complete the code to get the absolute path of 'file.txt' in the current directory.

Node.js

const absolutePath = path.[1]('file.txt');

Drag options to blanks, or click blank then click option'

Aresolve

Bdirname

Cbasename

Djoin

Attempts:

3 left

💡 Hint

Common Mistakes

Using path.join which does not guarantee an absolute path.

Using path.basename which returns only the file name.

path.resolve() converts a relative path to an absolute path.

3fill in blank

hard

Fix the error in the code to correctly resolve the absolute path of 'data.json' inside the 'config' folder.

Node.js

const configPath = path.resolve(__dirname, [1]);

Drag options to blanks, or click blank then click option'

A"config/data.json"

Bconfig/data.json

C'config\data.json'

D'config/data.json'

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the path string causing a syntax error.

Using backslashes without escaping them in strings.

Paths must be strings. Using quotes around the path string is required.

4fill in blank

hard

Fill both blanks to create an absolute path to 'index.js' inside the 'src' folder, starting from the current directory.

Node.js

const indexPath = path.[1](__dirname, [2]);

Drag options to blanks, or click blank then click option'

Aresolve

Bjoin

C'src/index.js'

D'src\index.js'

Attempts:

3 left

💡 Hint

Common Mistakes

Using path.join which may not return an absolute path.

Using backslashes without escaping in the path string.

path.resolve with __dirname and a string path returns the absolute path.

5fill in blank

hard

Fill all three blanks to create an absolute path to 'app.js' inside the 'lib' folder, using path.resolve and process.cwd().

Node.js

const appPath = path.[1](process.[2](), [3]);

Drag options to blanks, or click blank then click option'

Aresolve

Bcwd

C'lib/app.js'

D'lib\\app.js'

Attempts:

3 left

💡 Hint

Common Mistakes

Using __dirname instead of process.cwd() when the current working directory is needed.

Not quoting the path string or using backslashes incorrectly.

process.cwd() returns the current working directory. path.resolve combines it with the relative path string to get the absolute path.

Practice

1. What does path.resolve do in Node.js?

easy

A. It creates an absolute path from given path segments.

B. It reads the content of a file at a given path.

C. It deletes a file at a specified path.

D. It lists all files in a directory.

Solution

1. Step 1: Understand the purpose of path.resolve

   path.resolve combines path segments into a full absolute path.

2. Step 2: Compare with other options

   Reading, deleting, or listing files are unrelated to path.resolve's function.

3. Final Answer:

   It creates an absolute path from given path segments. -> Option A

4. Quick Check:

   path.resolve = absolute path creation [OK]

Hint: Remember: resolve means make full absolute path [OK]

Common Mistakes:

• Confusing path.resolve with file reading functions
• Thinking it deletes or lists files
• Assuming it returns relative paths

2. Which of the following is the correct syntax to use path.resolve to combine 'folder' and 'file.txt'?

easy

A. path.resolve('folder' + 'file.txt')

B. path.resolve['folder', 'file.txt']

C. path.resolve('folder', 'file.txt')

D. path.resolve('folder\\file.txt')

Solution

1. Step 1: Check correct function call syntax

   path.resolve is called with comma-separated arguments inside parentheses.

2. Step 2: Analyze each option

   path.resolve('folder', 'file.txt') uses correct syntax with separate arguments. path.resolve['folder', 'file.txt'] uses brackets incorrectly. path.resolve('folder' + 'file.txt') concatenates strings before passing to form 'folderfile.txt', which lacks a path separator and produces an incorrect path. path.resolve('folder\\file.txt') passes a single string using backslash as separator, which is incorrect on Unix systems and results in a wrong path.

3. Final Answer:

   path.resolve('folder', 'file.txt') -> Option C

4. Quick Check:

   Use commas inside parentheses for path.resolve [OK]

Hint: Use commas inside parentheses to combine paths [OK]

Common Mistakes:

• Using square brackets instead of parentheses
• Concatenating strings manually before passing
• Using backslash separators in path strings

3. Given the current directory is /home/user, what will path.resolve('docs', 'file.txt') return?

medium

A. /home/docs/file.txt

B. docs/file.txt

C. /docs/file.txt

D. /home/user/docs/file.txt

Solution

1. Step 1: Understand path.resolve behavior with relative paths

   When given relative paths, path.resolve resolves them against the current working directory.

2. Step 2: Combine current directory with given segments

   Current directory is /home/user, so resolving 'docs' and 'file.txt' results in /home/user/docs/file.txt.

3. Final Answer:

   /home/user/docs/file.txt -> Option D

4. Quick Check:

   Relative paths resolve from current directory [OK]

Hint: Relative paths resolve from current directory [OK]

Common Mistakes:

• Assuming path.resolve returns relative paths
• Confusing root directory with current directory
• Ignoring current working directory in resolution

4. What is wrong with this code snippet?

const path = require('path');
const fullPath = path.resolve['folder', 'file.txt'];
console.log(fullPath);

medium

A. Using square brackets instead of parentheses for function call.

B. Missing import of the path module.

C. Incorrect variable name for storing the path.

D. Using console.log instead of return.

Solution

1. Step 1: Identify syntax error in function call

   Function calls require parentheses (), not square brackets [].

2. Step 2: Check other parts of the code

   path module is imported correctly, variable name is valid, and console.log is fine for output.

3. Final Answer:

   Using square brackets instead of parentheses for function call. -> Option A

4. Quick Check:

   Function calls need parentheses () [OK]

Hint: Function calls always use parentheses, not brackets [OK]

Common Mistakes:

• Using brackets [] instead of parentheses ()
• Forgetting to import path module
• Confusing console.log with return

5. You want to get the absolute path to a file named config.json located in a folder settings inside your project root. Your current working directory can vary. Which code correctly ensures the absolute path regardless of where the script runs?

hard

A. path.resolve('settings', 'config.json')

B. path.resolve(__dirname, 'settings', 'config.json')

C. path.resolve(process.cwd(), 'settings/config.json')

D. path.resolve('./settings/config.json')

Solution

1. Step 1: Understand __dirname vs process.cwd()

   __dirname is the directory of the current script file, stable regardless of where the script is run from. process.cwd() is the current working directory, which can change.

2. Step 2: Analyze each option

   path.resolve(__dirname, 'settings', 'config.json') uses __dirname to build absolute path reliably. path.resolve('settings', 'config.json') and D depend on current working directory, which may vary. path.resolve(process.cwd(), 'settings/config.json') uses process.cwd() but with a string containing slash, which works but is less clear and can cause issues on some OS.

3. Final Answer:

   path.resolve(__dirname, 'settings', 'config.json') -> Option B

4. Quick Check:

   Use __dirname for stable absolute paths [OK]

Hint: Use __dirname to build absolute paths reliably [OK]

Common Mistakes:

• Using process.cwd() which can change unexpectedly
• Passing combined strings instead of separate parts
• Assuming relative paths always work