git show for commit details - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

Output of git show for a specific commit

What is the output of the command git show 1a2b3c4 if the commit message is "Fix typo in README" and the commit changes one line in README.md?

Git

git show 1a2b3c4

A Shows only the commit hash and author name, no diff or message

B Shows the commit hash, author, date, commit message "Fix typo in README", and the diff of the changed line in README.md

C Shows the list of all commits up to 1a2b3c4

D Shows an error: commit 1a2b3c4 not found

💡 Hint

git show displays detailed info about a single commit including message and changes.

The git show command displays the commit details including hash, author, date, commit message, and the diff of changes made in that commit.

🧠 Conceptual

intermediate

Understanding git show output sections

Which section is NOT part of the typical output of git show for a commit?

A List of all branches in the repository

B Commit hash and author information

C Diff of changes introduced by the commit

D Commit message

💡 Hint

git show focuses on one commit, not branch lists.

git show outputs commit metadata, message, and diff. It does not list branches.

❓ Troubleshoot

advanced

Diagnosing git show error for invalid commit

You run git show abc123 but get the error: fatal: bad object abc123. What is the most likely cause?

A The git show command requires a branch name, not a commit hash

B You are not inside a git repository folder

C Your git version is outdated and does not support git show

D The commit hash abc123 does not exist in the repository

💡 Hint

Check if the commit hash is correct and exists.

The error means git cannot find the commit hash abc123 in the repo.

🔀 Workflow

advanced

Using git show to review changes before merging

You want to review the changes introduced by commit f9e8d7c before merging. Which command helps you see the commit details and changes?

A git log --oneline f9e8d7c

B git merge f9e8d7c

C git show f9e8d7c

D git diff f9e8d7c..HEAD

💡 Hint

git show shows commit details and changes.

git show displays the commit message and diff for the specified commit.

✅ Best Practice

expert

Best practice for viewing commit details with limited diff

You want to use git show to see commit details but only want to see the names of changed files, not the full diff. Which command achieves this?

A git show --name-only <commit>

B git show --stat <commit>

C git show --oneline <commit>

D git show --patch <commit>

💡 Hint

Look for an option that shows only file names.

The --name-only option shows only the names of changed files without the diff.

Practice

1. What does the git show command do?

easy

A. Displays detailed information about a specific commit

B. Deletes a commit from the history

C. Creates a new branch

D. Lists all branches in the repository

Solution

1. Step 1: Understand the purpose of git show

   The command git show is used to display detailed information about a commit, including changes made and commit message.

2. Step 2: Compare with other git commands

   Other options like deleting commits, creating branches, or listing branches do not match the function of git show.

3. Final Answer:

   Displays detailed information about a specific commit -> Option A

4. Quick Check:

   git show = commit details [OK]

Hint: Remember: git show reveals commit details quickly [OK]

Common Mistakes:

• Confusing git show with git branch commands
• Thinking git show deletes commits
• Assuming git show lists branches

2. Which of the following is the correct syntax to show details of the latest commit?

easy

A. git show latest

B. git show HEAD

C. git show commit

D. git show last

Solution

1. Step 1: Identify the reference for the latest commit

   The latest commit in git is referenced by HEAD.

2. Step 2: Check the correct git show syntax

   The correct command to show the latest commit details is git show HEAD. Other options like 'latest', 'commit', or 'last' are not valid git references.

3. Final Answer:

   git show HEAD -> Option B

4. Quick Check:

   HEAD = latest commit [OK]

Hint: Use HEAD to refer to the latest commit in git [OK]

Common Mistakes:

• Using invalid references like 'latest' or 'last'
• Omitting the commit reference
• Confusing git show syntax with other commands

3. Given the command git show 1a2b3c4, what will be displayed?

medium

A. An error saying commit not found

B. A list of all commits in the repository

C. The detailed commit information for commit hash 1a2b3c4

D. The current branch name

Solution

1. Step 1: Understand the command with commit hash

   The command git show 1a2b3c4 requests detailed info about the commit with hash starting 1a2b3c4.

2. Step 2: Identify expected output

   Git will display the commit message, author, date, and changes made in that commit. It does not list all commits or branch names.

3. Final Answer:

   The detailed commit information for commit hash 1a2b3c4 -> Option C

4. Quick Check:

   git show + hash = commit details [OK]

Hint: Use commit hash with git show to see that commit's details [OK]

Common Mistakes:

• Expecting a list of commits instead of one commit
• Confusing commit hash with branch name
• Assuming git show shows errors if commit exists

4. You run git show without any arguments but get an error. What is the likely cause?

medium

A. You are in a directory not initialized as a git repository

B. You forgot to specify a commit hash

C. Your git version is outdated

D. You have no internet connection

Solution

1. Step 1: Understand default behavior of git show

   Running git show without arguments shows the latest commit (HEAD) details if inside a git repo.

2. Step 2: Identify cause of error

   If an error occurs, it is often because the current folder is not a git repository, so git commands fail.

3. Final Answer:

   You are in a directory not initialized as a git repository -> Option A

4. Quick Check:

   git show error = not a git repo [OK]

Hint: Check if you are inside a git repository folder [OK]

Common Mistakes:

• Assuming commit hash is always required
• Blaming internet connection for local git commands
• Thinking git version causes this error

5. You want to see the detailed changes of the commit before the latest one. Which command should you use?

hard

A. git show HEAD~2

B. git show HEAD^2

C. git show HEAD-1

D. git show HEAD~1

Solution

1. Step 1: Understand git commit references

   HEAD points to the latest commit. HEAD~1 means one commit before HEAD (the parent commit).

2. Step 2: Analyze options

   HEAD^2 refers to the second parent of a merge commit, HEAD~2 is two commits before HEAD, and HEAD-1 is not a valid git reference.

3. Step 3: Choose the best option for one commit before latest

   git show HEAD~1 clearly shows the commit before the latest one.

4. Final Answer:

   git show HEAD~1 -> Option D

5. Quick Check:

   HEAD~1 = commit before latest [OK]

Hint: Use HEAD~1 to refer to the commit before the latest [OK]

Common Mistakes:

• Confusing HEAD^2 with HEAD~1
• Using HEAD~2 which is two commits back
• Using invalid reference like HEAD-1