HEAD pointer concept in Git - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the HEAD pointer in Git?

HEAD is a reference that points to the current commit you have checked out in your working directory. It tells Git where you are in the project history.

intermediate

What does it mean when HEAD is 'detached' in Git?

A detached HEAD means HEAD points directly to a commit instead of a branch. Changes made here are not linked to any branch until you create one or move HEAD.

beginner

How does HEAD relate to branches in Git?

HEAD usually points to the latest commit on the current branch. When you switch branches, HEAD moves to point to the tip of that branch.

intermediate

What happens if you commit while in a detached HEAD state?

The commit is created but not attached to any branch. It can be lost if you switch branches without saving it by creating a new branch.

beginner

How can you check where HEAD is pointing in Git?

You can run the command git status or git symbolic-ref HEAD to see the current branch or commit HEAD points to.

What does the HEAD pointer in Git usually point to?

A The latest commit on the current branch

B The first commit in the repository

C A random commit in the history

D The remote repository

HEAD normally points to the latest commit on the branch you have checked out.

What is a detached HEAD in Git?

A HEAD points to a remote branch

B HEAD points directly to a commit, not a branch

C HEAD is missing from the repository

D HEAD points to the working directory

Detached HEAD means HEAD points to a commit directly, not to a branch.

Which command shows the current branch HEAD points to?

A git push

B git init

C git status

D git clone

git status shows the current branch and where HEAD points.

If you commit in a detached HEAD state and then switch branches without saving, what happens?

A The commit may be lost

B The commit is automatically added to the branch

C Git prevents switching branches

D The commit is pushed to remote

Commits made in detached HEAD can be lost if not saved by creating a branch.

When you switch branches, what happens to HEAD?

A It points to the remote repository

B It stays on the old branch

C It points to the first commit

D It moves to point to the tip of the new branch

HEAD moves to the latest commit of the branch you switch to.

Explain what the HEAD pointer is in Git and why it is important.

Think about how Git tracks your current position in the project history.

Describe what happens when HEAD is detached and how to safely work in that state.

Consider what it means to be 'detached' and how to keep your changes safe.