Folder hierarchy and paths in Intro to Computing - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Absolute vs Relative Paths

Which of the following best describes the difference between an absolute path and a relative path in a folder hierarchy?

A An absolute path uses only folder names, while a relative path uses folder numbers.

B An absolute path changes depending on the current folder, while a relative path always starts from the root folder.

C An absolute path is shorter than a relative path.

D An absolute path starts from the root folder, while a relative path starts from the current folder.

💡 Hint

Think about how you find a file starting from the main folder versus starting from where you are now.

An absolute path always starts from the root folder (like the main door of a building), while a relative path starts from the current folder (like starting from the room you are in).

❓ trace

intermediate

Tracing Folder Navigation Using Relative Paths

You are currently in the folder /home/user/documents. What folder will you reach if you use the relative path ../pictures/vacation?

A /home/user/pictures/vacation

B /home/user/documents/pictures/vacation

C /home/pictures/vacation

D /pictures/vacation

💡 Hint

The .. means go up one folder from your current location.

Starting at /home/user/documents, .. moves up to /home/user. Then adding pictures/vacation leads to /home/user/pictures/vacation.

❓ identification

advanced

Identifying the Correct Folder Path

Given the folder structure below, which path correctly points to the file report.txt located inside the 2024 folder?

/root
  ├── projects
  │    ├── 2023
  │    └── 2024
  │         └── report.txt
  └── archives

A /root/projects/2024/report.txt

B /root/archives/2024/report.txt

C /root/projects/2023/report.txt

D /root/2024/report.txt

💡 Hint

Look carefully at the folder tree and follow the path to report.txt.

The file report.txt is inside the 2024 folder, which is inside projects. So the full path is /root/projects/2024/report.txt.

❓ Comparison

advanced

Comparing Folder Paths in Different Operating Systems

Which statement correctly compares folder paths in Windows and Unix-like systems?

A Windows uses colons (:) to separate folders, while Unix-like systems use backslashes (\).

B Windows and Unix-like systems both use forward slashes (/) to separate folders.

C Windows uses backslashes (\) to separate folders, while Unix-like systems use forward slashes (/).

D Windows uses forward slashes (/), and Unix-like systems use backslashes (\).

💡 Hint

Think about how you type folder paths in Windows Explorer vs a Linux terminal.

Windows paths use backslashes (e.g., C:\Users\Documents), while Unix-like systems use forward slashes (e.g., /home/user/documents).

🚀 Application

expert

Determining the Number of Folder Levels in a Path

How many folder levels are in the following absolute path?

/var/www/html/projects/2024/site/index.html

A 8

B 6

C 5

D 7

💡 Hint

Count each folder name between slashes, excluding the file name.

The folders are: var, www, html, projects, 2024, site. That is 6 levels. The last part is a file, not a folder.

Practice

1. What does a folder path describe in a computer system?

easy

A. The color of a folder icon

B. The size of a file

C. The location of a file or folder within the folder hierarchy

D. The speed of the computer

Solution

1. Step 1: Understand folder hierarchy

   Folders are like drawers in a cabinet, organizing files and other folders.

2. Step 2: Define folder path

   A folder path tells the computer exactly where to find a file or folder within this hierarchy.

3. Final Answer:

   The location of a file or folder within the folder hierarchy -> Option C

4. Quick Check:

   Folder path = location [OK]

Hint: Folder paths show where files/folders are stored [OK]

Common Mistakes:

• Confusing path with file size
• Thinking path describes folder color
• Assuming path relates to computer speed

2. Which of the following is a correct absolute path on a Windows system?

easy

A. C:\\Users\\Documents\\file.txt

B. /Users/Documents/file.txt

C. Users/Documents/file.txt

D. Documents\\file.txt

Solution

1. Step 1: Identify absolute path format on Windows

   Windows absolute paths start with a drive letter followed by a colon and backslashes, e.g., C:\

2. Step 2: Check each option

   C:\\Users\\Documents\\file.txt uses drive letter C:, backslashes, and full path, so it's correct.

3. Final Answer:

   C:\Users\Documents\file.txt -> Option A

4. Quick Check:

   Windows absolute path = drive letter + backslashes [OK]

Hint: Windows absolute paths start with drive letter and colon [OK]

Common Mistakes:

• Using forward slashes instead of backslashes on Windows
• Missing drive letter in absolute path
• Confusing relative path with absolute path

3. Given the folder structure:

Root/
  FolderA/
    File1.txt
  FolderB/
    File2.txt

If the current folder is Root/FolderA, what file does the relative path ../FolderB/File2.txt point to?

medium

A. Root/FolderA/File1.txt

B. Root/File2.txt

C. Root/FolderA/FolderB/File2.txt

D. Root/FolderB/File2.txt

Solution

1. Step 1: Understand relative path with '..'

   '..' means move up one folder from current folder Root/FolderA to Root.

2. Step 2: Follow the rest of the path

   From Root, go into FolderB, then File2.txt, so full path is Root/FolderB/File2.txt.

3. Final Answer:

   Root/FolderB/File2.txt -> Option D

4. Quick Check:

   Relative path '..' moves up one folder [OK]

Hint: Use '..' to go up one folder in relative paths [OK]

Common Mistakes:

• Not moving up folder with '..'
• Assuming relative path starts from root
• Confusing folder names in path

4. Identify the error in this relative path if the current folder is /home/user/docs: ../../user/docs/file.txt

medium

A. Incorrect folder name 'user' repeated

B. Too many '..' moves up beyond root

C. Path uses forward slashes instead of backslashes

D. Missing drive letter for absolute path

Solution

1. Step 1: Analyze the relative path steps

   Starting at /home/user/docs, '..' moves up to /home/user, second '..' moves up to /home.

2. Step 2: Check the rest of the path

   Then path goes into 'user/docs/file.txt' again, repeating 'user/docs' which is redundant and likely incorrect.

3. Final Answer:

   Incorrect folder name 'user' repeated -> Option A

4. Quick Check:

   Repeated folder names in path indicate error [OK]

Hint: Check if path repeats folders unnecessarily [OK]

Common Mistakes:

• Thinking '..' moves beyond root causes error
• Confusing slash directions on Unix systems
• Expecting drive letters on Unix paths

5. You have a folder structure:

Project/
  src/
    main.py
  data/
    input.csv

If your current folder is Project/src, which relative path correctly accesses input.csv?

hard

A. data/input.csv

B. ../data/input.csv

C. /Project/data/input.csv

D. ./data/input.csv

Solution

1. Step 1: Identify current folder and target file location

   Current folder is Project/src; input.csv is in Project/data.

2. Step 2: Construct relative path

   To reach data from src, move up one folder with '..', then into data/input.csv, so path is '../data/input.csv'.

3. Final Answer:

   ../data/input.csv -> Option B

4. Quick Check:

   Use '..' to go up, then folder name to go down [OK]

Hint: Use '..' to move up, then folder name to move down [OK]

Common Mistakes:

• Using './data/input.csv' which looks inside src/data (doesn't exist)
• Using absolute path without root slash
• Assuming 'data/input.csv' works from src folder