git fsck for repository integrity - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What does git fsck report when the repository is healthy?

Run git fsck on a perfectly intact Git repository. What output do you expect?

Git

git fsck

A error: missing blob object

B fatal: not a git repository (or any of the parent directories): .git

C error: corrupt object detected

D Checking object directories: 100% (256/256), done.

💡 Hint

Think about what git fsck does when everything is fine.

git fsck checks the integrity of objects and links in the repository. If all is well, it reports no errors.

🧠 Conceptual

intermediate

What does git fsck check in a Git repository?

Select the best description of what git fsck verifies in a Git repository.

A It verifies the integrity and connectivity of Git objects and references.

B It merges branches and resolves conflicts automatically.

C It cleans up unnecessary files and optimizes the repository.

D It checks for uncommitted changes in the working directory.

💡 Hint

Think about what 'fsck' stands for in other systems.

git fsck stands for 'file system check' and verifies that all Git objects are intact and properly linked.

❓ Troubleshoot

advanced

You ran git fsck and got error: missing blob object. What is the likely cause?

After running git fsck, you see the error error: missing blob object. What does this mean?

A A Git object file is missing or corrupted, causing repository inconsistency.

B The working directory is not clean; files are staged but not committed.

C The repository has uncommitted changes that need to be committed.

D The remote repository is unreachable due to network issues.

💡 Hint

Missing blob means Git cannot find an object it expects.

This error means some object files are missing or corrupted, which breaks the repository's integrity.

🔀 Workflow

advanced

What is the correct sequence to verify and repair a corrupted Git repository?

You suspect your Git repository is corrupted. Which sequence of commands correctly checks and attempts to fix it?

A 3,1,4,2

B 1,3,4,2

C 1,2,3,4

D 2,1,3,4

💡 Hint

Start by checking integrity, then find good commits, reset, and clean up.

First, git fsck checks integrity. Then git reflog helps find good commits. git reset --hard restores to a good commit. Finally, git gc cleans up.

✅ Best Practice

expert

Which practice helps prevent repository corruption detected by git fsck?

Choose the best practice that reduces the chance of repository corruption that git fsck would detect.

A Deleting the .git directory to reset the repository when errors occur.

B Avoiding commits and pushing directly to remote without local history.

C Regularly running <code>git gc</code> and backing up the .git directory.

D Using shallow clones exclusively to reduce repository size.

💡 Hint

Think about maintenance and backups for safety.

Running git gc cleans up unnecessary files and packing objects efficiently. Backups protect against data loss and corruption.