Removing submodules in Git - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output after removing a submodule directory?

You run these commands in a git repository:

git rm --cached path/to/submodule
rm -rf path/to/submodule
git commit -m "Remove submodule"

What will git status show immediately after the commit?

A No changes, clean working tree

B Deleted submodule directory shown as deleted

C Submodule still listed in .gitmodules as modified

D Untracked files in submodule directory

💡 Hint

Think about what happens when you remove a submodule properly and commit.

After removing the submodule with git rm --cached and deleting its directory, committing removes it from the index and working tree. So git status shows a clean state with no changes.

❓ Configuration

intermediate

Which file must be edited to fully remove a submodule?

You want to completely remove a submodule from your git project. Besides removing the submodule directory and running git rm --cached, which file must you edit to remove the submodule reference?

A .gitattributes

B .gitmodules

C .gitignore

D config

💡 Hint

This file tracks submodule paths and URLs.

The .gitmodules file contains the configuration for submodules. Removing the submodule requires deleting its entry from this file.

❓ Troubleshoot

advanced

Why does git still show a submodule after removal?

You removed a submodule directory and ran git rm --cached and committed. But git status still shows the submodule as modified. What is the most likely cause?

A You did not run git submodule update

B You forgot to delete the submodule directory

C The submodule entry remains in .gitmodules and .git/config

D The submodule repository is corrupted

💡 Hint

Check all places where submodule info is stored.

Even after removing the submodule directory and index entry, if .gitmodules or .git/config still reference the submodule, git will show it as modified.

🔀 Workflow

advanced

Correct sequence to fully remove a git submodule

Arrange the steps in the correct order to fully remove a git submodule named libs/foo:

A 2,3,1,4

B 1,2,3,4

C 1,3,2,4

D 2,1,3,4

💡 Hint

Think about removing from index before deleting files and updating config.

First remove from index with git rm --cached, then remove from .gitmodules, delete directory, then commit.

✅ Best Practice

expert

What is the safest way to remove a submodule to avoid repository corruption?

Which practice helps avoid repository corruption when removing a git submodule?

A Run git rm --cached, remove submodule entry from .gitmodules, delete directory, then commit

B Remove submodule directory manually, then run git rm --cached

C Delete submodule directory and commit directly without git rm

D Only edit .gitmodules and commit, leaving directory intact

💡 Hint

Follow git's recommended removal steps carefully.

The safest way is to remove the submodule from the index first, then remove config entries, delete directory, and commit. This prevents leftover references causing corruption.