Why staging before committing matters in Git - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a file to the staging area.

Git

git [1] README.md

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

Aadd

Bcommit

Cpush

Dclone

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'commit' instead of 'add'

Using 'push' to stage files

The git add command moves changes to the staging area before committing.

2fill in blank

medium

Complete the code to commit staged changes with a message.

Git

git commit -m [1]

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

AREADME.md

B"Initial commit"

C-a

Dpush

Attempts:

3 left

💡 Hint

Common Mistakes

Using a filename instead of a message

Omitting quotes around the message

The commit message must be a string in quotes describing the changes.

3fill in blank

hard

Fix the error in the command to add all changed files to staging.

Git

git [1] .

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

Aadd

Bcommit

Cpush

Dclone

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'commit' instead of 'add'

Using 'push' which sends commits to remote

To stage all changes, use git add . which adds all files in the current directory.

4fill in blank

hard

Fill both blanks to show the status of files and then stage a specific file.

Git

git [1]
git [2] index.html

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

Astatus

Badd

Ccommit

Dpush

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'commit' instead of 'add' to stage

Using 'push' instead of 'status' to check changes

git status shows file changes, and git add stages a file.

5fill in blank

hard

Fill all three blanks to stage, commit with a message, and then push changes.

Git

git [1] app.py
git commit -m [2]
git [3] origin main

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

Aadd

B"Update app logic"

Cpush

Dclone

Attempts:

3 left

💡 Hint

Common Mistakes

Skipping staging before commit

Using 'clone' instead of 'push' to send changes

First stage the file with add, then commit with a message, finally push to remote.

Practice

1. Why is staging changes before committing important in Git?

easy

A. It automatically pushes changes to the remote repository.

B. It lets you choose which changes to include in the next commit.

C. It deletes untracked files from the working directory.

D. It merges branches without conflicts.

Solution

1. Step 1: Understand the role of staging

   Staging allows you to select specific changes to include in your next commit, rather than committing all changes at once.

2. Step 2: Compare staging with other Git actions

   Staging does not push changes, delete files, or merge branches; it only prepares changes for commit.

3. Final Answer:

   It lets you choose which changes to include in the next commit. -> Option B

4. Quick Check:

   Staging = Select changes before commit [OK]

Hint: Staging = picking changes to commit, not pushing or deleting [OK]

Common Mistakes:

• Confusing staging with pushing changes
• Thinking staging deletes files
• Believing staging merges branches

2. Which Git command correctly stages a file named index.html?

easy

A. git add index.html

B. git push index.html

C. git commit index.html

D. git status index.html

Solution

1. Step 1: Identify the command to stage files

   The git add command is used to stage files before committing.

2. Step 2: Verify other commands' purposes

   git commit records changes, git push sends commits to remote, and git status shows current status; none stage files.

3. Final Answer:

   git add index.html -> Option A

4. Quick Check:

   Stage file = git add [OK]

Hint: Use 'git add' to stage files before commit [OK]

Common Mistakes:

• Using git commit to stage files
• Confusing git push with staging
• Thinking git status stages files

3. Given these commands run in order:

echo 'Hello' > file.txt
git add file.txt
echo 'World' >> file.txt
git commit -m 'Add greeting'

What will be included in the commit?

medium

A. Only 'World' line in file.txt

B. Both 'Hello' and 'World' lines in file.txt

C. Only 'Hello' line in file.txt

D. An empty file.txt

Solution

1. Step 1: Understand staging timing

   The first echo creates file.txt with 'Hello'. Then git add stages this version.

2. Step 2: Changes after staging are not included

   Appending 'World' happens after staging, so this change is not in the commit.

3. Final Answer:

   Only 'Hello' line in file.txt -> Option C

4. Quick Check:

   Commit = staged snapshot, later edits excluded [OK]

Hint: Commit includes only staged changes, not later edits [OK]

Common Mistakes:

• Assuming commit includes all current file content
• Ignoring that staging freezes file state
• Thinking commit auto-stages changes

4. You staged a file with git add app.js but accidentally modified it afterward. What should you do to include the latest changes in your commit?

medium

A. Run git commit immediately

B. Run git reset app.js to unstage

C. Run git push to update remote

D. Run git add app.js again

Solution

1. Step 1: Recognize staging snapshot behavior

   Staging captures the file state at the time of git add. Later edits are not staged automatically.

2. Step 2: Stage the updated file again

   To include the latest changes, you must run git add app.js again to update the staging area.

3. Final Answer:

   Run git add app.js again -> Option D

4. Quick Check:

   Restage after edits to update commit content [OK]

Hint: Restage files after edits before committing [OK]

Common Mistakes:

• Committing without restaging changes
• Pushing before committing
• Unstaging instead of restaging

5. You have modified three files: index.html, style.css, and script.js. You want to commit only index.html and script.js changes but not style.css. Which sequence of commands achieves this?

hard

A. git add index.html script.js && git commit -m 'Partial commit'

B. git add . && git commit -m 'Partial commit'

C. git commit -a -m 'Partial commit'

D. git add style.css && git commit -m 'Partial commit'

Solution

1. Step 1: Understand selective staging

   To commit only specific files, stage only those files explicitly with git add.

2. Step 2: Analyze each option

   git add . && git commit -m 'Partial commit' stages all changes (including style.css). git commit -a -m 'Partial commit' commits all tracked changes automatically, including style.css. git add style.css && git commit -m 'Partial commit' stages only style.css, which is unwanted.

3. Final Answer:

   git add index.html script.js && git commit -m 'Partial commit' -> Option A

4. Quick Check:

   Select files with git add before commit [OK]

Hint: Stage only desired files before commit to exclude others [OK]

Common Mistakes:

• Using git add . to stage all files
• Using git commit -a which stages all tracked files
• Staging unwanted files by mistake