Git Questions | PrepOps.Dev

General 7 questions

#1
How to list the current git references in a given repository?
#2
What git diff does?
#3
Which one is faster? git diff-index HEAD or git diff HEAD
#4
By which other Git commands does git diff used?
#5
Describe how git status works
#6
If git status has to run diff on all the files in the HEAD commit to those in staging area/index and another one on staging area/index and working directory, how is it fairly fast?
#7
Git - Squashing Commits
Objective

Learn how to squash commits

Instructions
1. In a git repository, create a new file with the content "Mario" and create a new commit
2. Make change to the content of the file you just created so the content is "Mario & Luigi" and create another commit
3. Verify you have two separate commits
4. Squash the latest two commits into one commit
After you complete the exercise

Answer the following:
- What is the reason for squashing commits?
- Is it possible to squash more than 2 commits?

Git Basics 8 questions

#8
How do you know if a certain directory is a git repository?
#9
Explain the following: git directory, working directory and staging area
#10
What is the difference between git pull and git fetch?
#11
How to check if a file is tracked and if not, then track it?
#12
Explain what the file gitignore is used for
#13
How can you see which changes have done before committing them?
#14
What git status does?
#15
You've created new files in your repository. How to make sure Git tracks them?

Scenarios 2 questions

#16
You have files in your repository you don't want Git to ever track them. What should you be doing to avoid ever tracking them?
#17
A development team in your organization is using a monorepo and it's became quite big, including hundred thousands of files. They say running many git operations is taking a lot of time to run (like git status for example). Why does that happen and what can you do in order to help them?

Branches 7 questions

#18
What's is the branch strategy (flow) you know?
#19
True or False? A branch is basically a simple pointer or reference to the head of certain line of work
#20
You have two branches - main and devel. How do you make sure devel is in sync with main?
#21
Describe shortly what happens behind the scenes when you run git branch
#22
When you run git branch how does Git know the SHA-1 of the last commit?
#23
What unstaged means in regards to Git?
#24
True or False? when you git checkout some_branch, Git updates .git/HEAD to /refs/heads/some_branch

Merge 5 questions

Rebase 11 questions

#30
You would like to move forth commit to the top. How would you achieve that?
#31
In what situations are you using git rebase?
#32
How do you revert a specific file to previous commit?
#33
How to squash last two commits?
#34
What is the .git directory? What can you find there?
#35
What are some Git anti-patterns? Things that you shouldn't do
#36
How do you remove a remote branch?
#37
Are you familiar with gitattributes? When would you use it?
#38
How do you discard local file changes? (before commit)
#39
How do you discard local commits?
#40
True or False? To remove a file from git but not from the filesystem, one should use git rm

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