Octopus merge for multiple branches in Git - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

Output of Octopus Merge Command

What is the output when you run the following command in a Git repository with branches feature1 and feature2 checked out?

git merge --no-ff --no-commit feature1 feature2

Git

git merge --no-ff --no-commit feature1 feature2

A Throws an error because multiple branches cannot be merged at once without octopus flag.

B Merges only the first branch <code>feature1</code> and ignores <code>feature2</code>.

C Starts a merge commit combining both branches without committing, allowing manual conflict resolution.

D Automatically commits the merge combining both branches without user intervention.

💡 Hint

Think about what the --no-commit flag does in a merge.

The command merges both branches into the current branch but pauses before committing, allowing you to review or resolve conflicts.

🧠 Conceptual

intermediate

Purpose of Octopus Merge

What is the main purpose of an octopus merge in Git?

A To create a new branch from multiple branches.

B To merge more than two branches simultaneously into one commit.

C To split one branch into multiple branches.

D To delete multiple branches in a single command.

💡 Hint

Think about merging multiple branches at once.

An octopus merge allows combining multiple branches into one merge commit in a single operation.

🔀 Workflow

advanced

Correct Workflow for Octopus Merge

Which sequence of commands correctly performs an octopus merge of branches dev, test, and feature into main?

A git checkout dev<br>git merge main test feature<br>git push origin dev

B git checkout main<br>git merge --no-ff dev<br>git merge --no-ff test<br>git merge --no-ff feature

C git checkout main<br>git merge --squash dev test feature<br>git commit -m "Squash merge"

D git checkout main<br>git merge dev test feature<br>git commit -m "Octopus merge"

💡 Hint

Octopus merge merges multiple branches in one command.

Option D merges all branches at once into main with a single merge commit, which is the octopus merge workflow.

❓ Troubleshoot

advanced

Octopus Merge Failure Reason

You try to run git merge dev test feature but get the error: fatal: You have not concluded your merge (MERGE_HEAD exists).
What is the most likely cause?

A A previous merge was started but not completed or committed.

B Octopus merge requires a special flag that was not used.

C The branches <code>dev</code>, <code>test</code>, and <code>feature</code> do not exist.

D The current branch is not <code>main</code>.

💡 Hint

Check if there is an unfinished merge.

The error means a merge is in progress and must be finished before starting a new one.

✅ Best Practice

expert

Best Practice for Octopus Merge Conflicts

When performing an octopus merge involving multiple branches, what is the best practice if conflicts arise?

A Abort the octopus merge and merge branches one by one to isolate conflicts.

B Force the merge with <code>git merge --strategy=ours</code> to ignore conflicts.

C Commit the merge immediately and fix conflicts later in separate commits.

D Delete conflicting branches and recreate them after the merge.

💡 Hint

Think about isolating problems to fix them easily.

Merging branches one by one helps identify which branch causes conflicts and makes resolving easier.