Interview Questions & Answers

Git & GitHub Developer Essentials · Version Control

Answer: git revert <commit> - creates a new commit that undoes the changes of a previous commit, preserving history.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

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Git & GitHub Developer Essentials · Version Control

Answer: git checkout <commit> -- <file> - restores a file to its state at a specific commit. Follow:

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

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Git & GitHub Developer Essentials · Version Control

Answer: reset rewrites history; revert creates a new commit to undo changes, preserving history.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

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Git & GitHub Developer Essentials · Version Control

Answer: Shows a log of where your HEAD and branch tips have been, useful for recovering lost commits.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

by an existing commit from another branch onto your current branch.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

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Git & GitHub Developer Essentials · Version Control

Answer: git cherry-pick <commit> - applies the changes introduced by an existing commit from another branch onto your current branch.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

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Git & GitHub Developer Essentials · Version Control

Answer: remote server); branching creates a lightweight, isolated line of development within a single repository.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

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Git & GitHub Developer Essentials · Version Control

Answer: Forking creates a copy of an entire repository (often on a remote server); branching creates a lightweight, isolated line of development within a single repository.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

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Git & GitHub Developer Essentials · Version Control

Answer: A permanent, immutable pointer to a specific commit, often used to mark release points (e.g., v1.0).

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: A common collaboration model involving forking, branching, pull requests, and code review.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

improve quality, and ensure best practices.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: The process of other developers examining source code to find bugs, improve quality, and ensure best practices.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: An automation platform that allows you to define custom workflows to build, test, and deploy code directly from GitHub.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

nother, typically involving code review.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: A request to merge changes from one branch (often from a fork) into another, typically involving code review.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: the main repository, storing pointers in Git while files are on a remote server.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: Git Large File Storage - a Git extension for versioning large files outside the main repository, storing pointers in Git while files are on a remote server.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

receive. Used for automation and enforcing policies.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: Scripts that Git executes before or after events like commit, push, and receive. Used for automation and enforcing policies.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

subdirectory, maintaining separate histories.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: Allows you to embed one Git repository inside another as a subdirectory, maintaining separate histories.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

branch name, meaning you're not on any branch.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: When your HEAD pointer points directly to a commit instead of a branch name, meaning you're not on any branch.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: Interactive Rebase: git rebase -i <commit> - allows you to squash, reorder, edit, or drop commits during a rebase operation.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Git & GitHub Developer Essentials · Version Control

Answer: (Typo for "Interactive Rebase"?) Interactive Rebase: git rebase -i <commit> - allows you to squash, reorder, edit, or drop commits during a rebase operation.

What interviewers expect

A clear definition tied to Version Control in Git & GitHub projects
Trade-offs (performance, maintainability, security, cost)
When you would and would not use it in production

Real-world example

In a production Git & GitHub application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.

How to explain in the interview

Define the concept in one or two sentences.
Context — where it fits in Git & GitHub architecture.
Example — a specific project, bug, or performance win.
Trade-off — what you gain vs what you sacrifice.

Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.

Permalink & share

Interview Q&A

Popular tracks

Mid PDF Git revert?

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Real-world example

How to explain in the interview

Mid PDF Git file-revert?

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Real-world example

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Mid PDF reset vs revert?

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Mid PDF Git reflog?

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Real-world example

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Mid PDF Git cherry-pick? git cherry-pick <commit> - applies the changes introduced

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Real-world example

How to explain in the interview

Mid PDF Git cherry-pick?

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Real-world example

How to explain in the interview

Mid PDF Forking vs. branching? Forking creates a copy of an entire repository (often on a

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Real-world example

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Mid PDF Forking vs. branching?

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Real-world example

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Mid PDF Git tag?

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Mid PDF GitHub workflow?

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Mid PDF Code review? The process of other developers examining source code to find bugs,

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Mid PDF Code review?

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Mid PDF GitHub Actions?

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Mid PDF Pull Request? A request to merge changes from one branch (often from a fork) into

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Mid PDF Pull Request?

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Mid PDF Git LFS? Git Large File Storage - a Git extension for versioning large files outside

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Mid PDF Git LFS?

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Mid PDF Git hooks? Scripts that Git executes before or after events like commit, push, and

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Mid PDF Git hooks?

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Mid PDF Git submodules? Allows you to embed one Git repository inside another as a

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