Questions

Answer the following questions to test your knowledge of this chapter:

1. How does creating a new commit change the history stored in the repository — that is, how does it change the graph of revisions and where branch heads point to?
2. What is the difference between git commit and git commit --all (or git commit -a)?
3. How do you check what changes you have made in the local repository? How do you undo them?
4. What is the simplest way to fix an error in the commit message of the last commit on the current branch?
5. What do you do when you realize that the changes you started to write (but didn’t commit) should be made on a separate new branch?
6. What is the simplest way to switch to the previous branch, and when can it fail?