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rootnode-academy/content/root/root-03-git-collaborative-development/m02-git-mental-model/03-knowledge-check.md
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ced4568andClaude Sonnet 5 e68b6f445a feat(root03): author Git & Collaborative Development
Adds all 6 ROOT 03 modules (why version control exists, the Git mental model, everyday Git,
branching & merging, remote repositories, engineering Git workflow) — 31 activities. Uses only
real LOCAL Git repositories throughout — no Gitea account, no network access, and no
RootNode-canonical-repo credential is ever needed or exposed in a student Lab
(docs/ROOT_FOUNDATIONS_LAB_STRATEGY.md §4). Modules 1, 2, and 6 are conceptual bookends with no
lab, matching the flexible readiness standard already used in ROOT 01/02.

Adds 3 new hands-on Git scenarios plus 2 MCQs: git-everyday-basics (init/add/commit, validated
by inspecting real `git log`/`git show` state, not just command output strings — Step 6's
explicit requirement), git-branching-and-merge (a REAL merge conflict caused on purpose by two
branches editing the same line, resolved by the student, validated by confirming the conflict
markers are gone and a real two-parent merge commit exists), and git-remote-clone-push (a real
local bare repository standing in for a remote — clone/commit/push validated by inspecting the
REMOTE side directly, not just the student's own clone). All tested end-to-end via the real
scenario-validation API, including negative tests.

Wires rootnode-git-fundamentals-assessment (2 required + 3 random-draw scenarios) using the
existing Phase 3B assessment engine.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
2026-08-26 17:08:00 -05:00

1020 B

Knowledge Check: Git Mental Model


1. Name the three areas a file passes through, in order.

Answer: Working tree → staging area → repository (commit history).


2. What does git add actually do, in terms of this model?

Answer: Moves a change from the working tree into the staging area — marking it as ready to be included in the next commit.


3. If you edit three files but only git add one of them, what happens when you git commit?

Answer: Only the staged file is included in the new commit — the other two edited-but-unstaged files remain as uncommitted changes in the working tree.


4. What is HEAD?

Answer: Git's pointer to the commit you're currently looking at — almost always the tip of whichever branch you have checked out.

Instructor Notes

Facilitation: Question 3 is the single most important check in this module — if students get this wrong, revisit the diagram before continuing to Module 3.

Approximate timing: 5 minutes.