Git 3-Way Merge Explained | Fast Forward vs Divergence with git log --graph + MCQs
In this Git tutorial, you’ll learn exactly when branch divergence happens and why Git sometimes performs a Fast-Forward merge and other times requires a 3-Way Merge.
Using a complete hands-on lab, I explain Git branching, commit history, git log --graph visualization, merge commits, common ancestors, and Git internals step-by-step.
🚀 In this lesson, you will learn:
✅ What branch divergence really means in Git
✅ When Fast-Forward merge is possible
✅ Why Git requires a 3-Way Merge
✅ How Git identifies the common ancestor commit
✅ How to read git log --oneline --graph correctly
✅ Meaning of *, |, /, and merge graph structures
✅ How Git creates merge commits internally
✅ How to inspect commit parents using git cat-file
✅ Why deleting a branch does NOT delete commits
📌 Hands-On Topics Covered
git init
git switch -c
git log --oneline --graph --all
git merge
git branch --merged
git branch --no-merged
git cat-file -p
Fast-Forward Merge
3-Way Merge
Merge Commit
Branch Divergence
Git Commit Graphs
💡 Perfect for:
Beginners learning Git branching
Developers preparing for interviews
Students confused about Git merge strategies
Anyone struggling to understand git log --graph
#Git #GitMerge #GitTutorial #GitBranching #ThreeWayMerge #FastForwardMerge #GitLog #GitInternals #DevOps #SoftwareEngineering
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