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100+ Free Certified Open Source Developer for Enterprise Practice Questions

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A first-time contributor opens a PR that solves a real bug but does not follow the project's commit message format. What is the most community-friendly maintainer response?

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Key Facts: Certified Open Source Developer for Enterprise Exam

$250

Exam Fee (USD, exam only)

The Linux Foundation

60

Multiple-Choice Questions

The Linux Foundation

90 min

Exam Duration

The Linux Foundation

2 years

Certification Validity

The Linux Foundation

5 domains

Blueprint (Consuming OSS is largest at 28%)

The Linux Foundation

Not published

Passing Score

The Linux Foundation (not publicly disclosed)

The Linux Foundation's Certified Open Source Developer for Enterprise (CODE) is a 90-minute, online proctored, multiple-choice exam of 60 questions, costing $250 USD with the credential valid for 2 years and one retake included. The five domains are Fundamentals of Open Source Software Development (24%), Open Source Licensing and Usage Guidelines (14%), Consuming Open Source Software (28%), Contributing to Open Source (22%), and Open Source Management Operations (12%). The passing score is not publicly published, and there are no prerequisites for this beginner-level certification.

Sample Certified Open Source Developer for Enterprise Practice Questions

Try these sample questions to test your Certified Open Source Developer for Enterprise exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In an open source project hosted on a forge such as GitHub or GitLab, what is the primary purpose of a pull request (also called a merge request)?
A.To propose a set of code changes from one branch so maintainers can review and discuss them before merging
B.To permanently delete a feature branch after a release is tagged
C.To request that a new contributor be granted commit access to the main branch
D.To automatically deploy the current state of the main branch to production
Explanation: A pull request (PR) or merge request (MR) bundles proposed commits from a source branch and opens a review thread where maintainers can comment, request changes, run CI, and ultimately merge. It is the central collaboration unit of fork-and-pull and branch-based workflows.
2Under Semantic Versioning (SemVer 2.0.0), a release changes a public API in a way that breaks backward compatibility. Which part of the version number MUST be incremented?
A.The PATCH number (the Z in X.Y.Z)
B.The MINOR number (the Y in X.Y.Z)
C.The MAJOR number (the X in X.Y.Z)
D.The build metadata appended after a plus sign
Explanation: SemVer requires incrementing the MAJOR version (X) for any backward-incompatible API change, the MINOR (Y) for backward-compatible additions, and the PATCH (Z) for backward-compatible bug fixes. Breaking changes therefore force a MAJOR bump.
3A maintainer reviewing a pull request wants to follow widely accepted open source code-review etiquette. Which practice best reflects healthy review culture?
A.Reject any PR that does not exactly match the reviewer's personal coding style, without explanation
B.Give specific, actionable, and respectful feedback focused on the code rather than the person
C.Merge contributions from known community members without reading the diff to save time
D.Require every contributor to rewrite their entire patch as a single squashed commit before any review begins
Explanation: Constructive code review focuses on the change, not the contributor, and offers concrete, actionable suggestions. This keeps the community welcoming and improves code quality, which directly affects contributor retention.
4What is the main function of an issue tracker in an open source project?
A.To store the project's compiled release binaries for download
B.To enforce that all contributors sign a Contributor License Agreement
C.To act as the canonical version control history of every source file
D.To record and triage bug reports, feature requests, and tasks so work can be prioritized and discussed
Explanation: An issue tracker captures bugs, feature requests, questions, and tasks, letting maintainers label, triage, assign, and prioritize work transparently. It is the public record of what needs doing and why.
5In the classic fork-and-pull (forking) workflow used by many open source projects, how does an external contributor without write access typically submit a change?
A.They push commits directly to the main branch of the upstream repository
B.They email a patch file to every maintainer individually
C.They fork the upstream repo, push a branch to their fork, and open a pull request back to upstream
D.They open an issue and wait for a maintainer to write the code on their behalf
Explanation: In the fork-and-pull model, a contributor creates a personal fork, commits changes on a topic branch in that fork, and then opens a pull request targeting the upstream repository. This lets people contribute without needing write access to upstream.
6Which statement best captures a core principle commonly associated with open source software, as reflected in the Open Source Definition?
A.The license must allow free redistribution and access to source code, without restricting who can use the software or for what purpose
B.The software must always be developed by an unpaid volunteer community rather than companies
C.The license may restrict commercial use to protect the project's nonprofit status
D.Only the original author is permitted to create and distribute modified versions
Explanation: The Open Source Definition requires free redistribution, available source code, allowed derived works, and no discrimination against persons, groups, or fields of endeavor. Anyone may use the software for any purpose, including commercial use.
7A project follows SemVer and ships a backward-compatible new feature plus several bug fixes in one release from version 2.4.7. What is the correct next version?
A.2.4.8
B.3.0.0
C.2.4.7-rc.1
D.2.5.0
Explanation: Adding backward-compatible functionality increments MINOR and resets PATCH to zero, giving 2.5.0. When a release contains both new features and fixes, the highest-precedence change (the MINOR feature) determines the bump.
8What does a project's CONTRIBUTING file (e.g., CONTRIBUTING.md) primarily provide?
A.The legal text of the project's open source license
B.Guidance on how to set up the dev environment, file issues, and submit acceptable contributions
C.A signed list of every person who has ever committed to the project
D.The cryptographic signatures used to verify release artifacts
Explanation: A CONTRIBUTING document tells newcomers how to participate: environment setup, branching and PR conventions, coding standards, testing expectations, and sign-off or CLA/DCO requirements. It lowers the barrier to a successful first contribution.
9Why do healthy open source projects typically adopt a Code of Conduct?
A.To replace the software license with stricter usage terms
B.To define expected behavior and provide a process for reporting and handling harassment or abuse
C.To require all contributors to be employed by the same company
D.To guarantee that every pull request is merged within 24 hours
Explanation: A Code of Conduct sets community behavioral standards and gives participants a defined, enforceable process for reporting misconduct. This protects contributors and sustains an inclusive, productive community, which is essential to long-term project health.
10In Git, what is the key difference between merging and rebasing a feature branch onto the main branch?
A.Merge rewrites commit hashes while rebase preserves them exactly
B.Rebase permanently deletes the main branch, while merge keeps it
C.There is no functional difference; the two commands are aliases
D.Merge creates a merge commit tying the histories together, while rebase replays your commits on top of main to create a linear history
Explanation: A merge integrates branches by creating a merge commit that joins both histories, preserving the original branch structure. A rebase moves your commits to replay on top of the latest main, producing new commit hashes and a linear history.

About the Certified Open Source Developer for Enterprise Exam

The Certified Open Source Developer for Enterprise (CODE) certification validates that a developer can navigate enterprise open source processes, governance, security, and cross-team collaboration. It is a 90-minute, online proctored, multiple-choice exam of 60 questions, developed with the TODO Group and the Open Source Initiative. The blueprint spans five domains: Fundamentals of Open Source Software Development (24%), Open Source Licensing and Usage Guidelines (14%), Consuming Open Source Software (28%), Contributing to Open Source (22%), and Open Source Management Operations (12%). Topics include Git pull-request and code-review workflows, semantic versioning, permissive vs. copyleft licensing and compatibility, CLAs and DCOs, software composition analysis, CVE/CVSS vulnerability management, SBOMs in SPDX and CycloneDX, upstreaming, and OSPO operations. CODE is distinct from FSOSD, which is the finance-industry-focused FINOS open source certification.

Questions

60 scored questions

Time Limit

90 minutes

Passing Score

Not publicly published by the Linux Foundation

Exam Fee

$250 (The Linux Foundation (with the TODO Group and Open Source Initiative))

Certified Open Source Developer for Enterprise Exam Content Outline

24%

Fundamentals of Open Source Software Development

Issues and pull/merge requests, code-review etiquette, the Open Source Definition and OSS principles, fork-and-pull and branch workflows in Git, community norms and governance, and release management with semantic versioning, tags, changelogs, and CI.

14%

Open Source Licensing and Usage Guidelines

Permissive licenses (MIT, BSD, Apache-2.0) vs. strong and weak copyleft (GPL, LGPL, MPL), license compatibility (e.g., Apache-2.0 with GPLv3 but not GPLv2), copyleft and source-disclosure obligations on distribution, SPDX identifiers, export control, license risk assessment, and CLAs vs. DCOs.

28%

Consuming Open Source Software

Codebase and maintenance risk, the software supply chain, direct and transitive dependencies, dependency pinning and integrity verification, approval/intake processes and internal artifact proxies, software composition analysis, CVE/CVSS and OSV-based vulnerability management, SLSA and Sigstore provenance, and SBOMs in SPDX and CycloneDX.

22%

Contributing to Open Source

Contribution strategy and the upstream-first approach, code and documentation best practices, focused pull requests with tests, copyright ownership and work-made-for-hire IP, contribution risks (secrets, incompatible licenses), responsible disclosure, project types and licensing/governance choices, and outbound contribution approval processes.

12%

Open Source Management Operations

The roles and responsibilities of an Open Source Program Office (OSPO), policy and approved-component catalogs, escalation paths to legal and security, InnerSource practices, funding and sustaining upstream dependencies, developer support, and program metrics.

How to Pass the Certified Open Source Developer for Enterprise Exam

What You Need to Know

  • Passing score: Not publicly published by the Linux Foundation
  • Exam length: 60 questions
  • Time limit: 90 minutes
  • Exam fee: $250

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Certified Open Source Developer for Enterprise Study Tips from Top Performers

1Master the difference between permissive (MIT, BSD, Apache-2.0) and copyleft (GPL strong, LGPL/MPL weak) licenses, and remember key compatibility facts such as Apache-2.0 being compatible with GPLv3 but not GPLv2.
2Spend the most time on Consuming Open Source (28%): SBOM formats (SPDX, CycloneDX), software composition analysis, CVE/CVSS, transitive dependencies, dependency pinning, and supply-chain controls like SLSA and Sigstore.
3Know the CLA vs. DCO distinction cold: a DCO is a per-commit Signed-off-by attestation, while a CLA is a formal agreement signed once that can cover all future contributions.
4Understand semantic versioning rules: MAJOR for breaking changes, MINOR for backward-compatible features, PATCH for fixes, and that 0.x.y means the API is unstable.
5Study OSPO operations: its role in policy, license compliance, security governance, developer support, escalation paths, and the meaning of InnerSource and upstream-first contribution.
6Practice the consuming-vs-contributing mindset: how to vet a dependency before adoption (license, security, maintenance health) and how to contribute responsibly (IP review, focused PRs with tests, responsible disclosure).

Frequently Asked Questions

What are the exam facts for the CODE certification?

The Linux Foundation lists CODE as a 90-minute, online proctored, multiple-choice exam of 60 questions, costing $250 USD. The credential is valid for 2 years, the eligibility window is 12 months, and one retake is included (two attempts total).

Is there a published passing score for the CODE exam?

No. The Linux Foundation does not publicly publish the passing score for the CODE exam. Candidates should focus on mastering all five domains rather than targeting a specific percentage.

What does the CODE exam cover?

Five domains: Fundamentals of Open Source Software Development (24%), Open Source Licensing and Usage Guidelines (14%), Consuming Open Source Software (28%), Contributing to Open Source (22%), and Open Source Management Operations (12%).

Are there prerequisites for the CODE certification?

No. CODE is a beginner-level certification with no prerequisites. The Linux Foundation's LFD221 (Open Source Essentials for Developers) course is recommended preparation but is not required.

How is CODE different from the FSOSD certification?

CODE is a general enterprise open source developer certification from the Linux Foundation, TODO Group, and OSI. FSOSD is the finance-industry-focused FINOS Certified Open Source Developer certification. They are separate credentials with different scopes.

How long is the CODE credential valid?

The CODE certification is valid for 2 years. The 12-month eligibility window applies to scheduling and taking the exam after purchase, and the purchase includes one retake.