Tagging specific commits in Git - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a lightweight tag named 'v1.0' on the current commit.

Git

git tag [1]

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

A-f v1.0

B-a v1.0

C-m "version 1.0" v1.0

Dv1.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using -a or -m creates an annotated tag, not lightweight.

Forcing a tag with -f is not needed here.

Using git tag v1.0 creates a lightweight tag named 'v1.0' on the current commit.

2fill in blank

medium

Complete the code to create an annotated tag 'v2.0' with the message 'Release version 2.0'.

Git

git tag [1] v2.0 -m "Release version 2.0"

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

A-a

B-l

C-f

D-d

Attempts:

3 left

💡 Hint

Common Mistakes

Using -f forces overwriting a tag, not creating annotated tags.

The -l option lists tags, it does not create them.

The -a option creates an annotated tag, which includes a message and metadata.

3fill in blank

hard

Fix the error in the command to tag commit 'abc123' with tag 'v3.0'.

Git

git tag v3.0 [1]

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

Aabc123

B-m abc123

C-a abc123

DHEAD~1

Attempts:

3 left

💡 Hint

Common Mistakes

Adding -m or -a before the commit hash causes errors.

Using HEAD~1 tags the previous commit, not the specified one.

To tag a specific commit, provide the commit hash directly after the tag name.

4fill in blank

hard

Fill both blanks to create an annotated tag 'v4.0' on commit 'def456' with message 'Version 4 release'.

Git

git tag [1] v4.0 [2] -m "Version 4 release"

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

A-a

B-f

Cdef456

D-d

Attempts:

3 left

💡 Hint

Common Mistakes

Using -f forces overwriting tags, not needed here.

The -d option deletes tags, not creates them.

Use -a to create an annotated tag and specify the commit hash after the tag name.

5fill in blank

hard

Fill all three blanks to delete a tag named 'v5.0' both locally and remotely (remote named 'origin').

Git

git tag -d [1] && git push [2] :refs/tags/[3]

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

Av5.0

Borigin

Dupstream

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong remote name causes failure to delete remote tag.

Forgetting to delete the remote tag leaves it still available.

First delete the local tag with git tag -d v5.0, then delete the remote tag by pushing an empty reference to it.

Practice

1. What is the main purpose of tagging a commit in Git?

easy

A. To delete a commit permanently

B. To label a specific commit for easy reference later

C. To merge two branches automatically

D. To create a new branch from the commit

Solution

1. Step 1: Understand what a tag does

   A tag in Git is a label that points to a specific commit, making it easy to find later.

2. Step 2: Compare options with tag purpose

   Deleting commits, merging branches, or creating branches are different Git actions unrelated to tagging.

3. Final Answer:

   To label a specific commit for easy reference later -> Option B

4. Quick Check:

   Tag = label commit [OK]

Hint: Tags mark commits for quick access later [OK]

Common Mistakes:

• Confusing tags with branches
• Thinking tags delete commits
• Assuming tags merge code

2. Which of the following commands correctly tags a commit with hash abc123 as v1.0?

easy

A. git tag -m v1.0 abc123

B. git tag abc123 v1.0

C. git tag v1.0 abc123

D. git commit tag v1.0 abc123

Solution

1. Step 1: Recall git tag syntax

   The correct syntax to tag a specific commit is git tag <tagname> <commit-hash>.

2. Step 2: Match syntax with options

   git tag v1.0 abc123 matches the correct order: tag name first, then commit hash. Others have wrong order or invalid flags.

3. Final Answer:

   git tag v1.0 abc123 -> Option C

4. Quick Check:

   git tag <tag> <commit> [OK]

Hint: Tag name comes before commit hash in command [OK]

Common Mistakes:

• Swapping tag name and commit hash
• Using git commit instead of git tag
• Adding wrong flags like -m without message

3. What will be the output of git show v2.0 if v2.0 is a tag pointing to commit def456?

medium

A. Shows details of the commit with hash def456

B. Lists all tags in the repository

C. Deletes the tag v2.0

D. Shows the commit history of the current branch

Solution

1. Step 1: Understand git show with a tag

   Running git show <tag> displays the commit details the tag points to.

2. Step 2: Match output with options

   Shows details of the commit with hash def456 correctly describes the output. Other options describe different commands or actions.

3. Final Answer:

   Shows details of the commit with hash def456 -> Option A

4. Quick Check:

   git show tag = commit details [OK]

Hint: git show tag shows tagged commit info [OK]

Common Mistakes:

• Thinking git show lists all tags
• Confusing git show with git tag commands
• Assuming git show deletes tags

4. You tried to tag a commit with git tag v1.1 abc789 but got an error saying "fatal: Not a valid object name abc789". What is the likely cause?

medium

A. The tag name v1.1 is already used

B. You forgot to push the tag to the remote

C. You need to add -m message to the tag command

D. The commit hash abc789 does not exist in the repository

Solution

1. Step 1: Analyze the error message

   "Not a valid object name" means Git cannot find the commit hash specified.

2. Step 2: Check other options

   Not pushing tags or tag name conflicts cause different errors. -m is optional for annotated tags.

3. Final Answer:

   The commit hash abc789 does not exist in the repository -> Option D

4. Quick Check:

   Invalid commit hash = error [OK]

Hint: Check commit hash exists before tagging [OK]

Common Mistakes:

• Assuming tag name conflict causes this error
• Thinking push is needed before tagging
• Forcing -m message without need

5. You want to tag the commit that is two commits behind the current HEAD with the tag release-2024. Which command should you use?

hard

A. git tag release-2024 HEAD~2

B. git tag release-2024 HEAD^2

C. git tag release-2024 HEAD~

D. git tag release-2024 HEAD-2

Solution

1. Step 1: Understand commit references

   In Git, HEAD~2 means two commits before HEAD. HEAD^2 means second parent of a merge commit, which is different.

2. Step 2: Match correct syntax for tagging

   git tag release-2024 HEAD~2 correctly tags the commit two behind HEAD. Options C and D are invalid or incorrect references.

3. Final Answer:

   git tag release-2024 HEAD~2 -> Option A

4. Quick Check:

   HEAD~2 = two commits behind [OK]

Hint: Use HEAD~N to tag N commits behind HEAD [OK]

Common Mistakes:

• Confusing HEAD~2 with HEAD^2
• Using invalid commit references like HEAD~ or HEAD-2
• Tagging wrong commit by mistake