Certified DevOps Master (CDM) — Questions and Answers

Question 1: What is infrastructure automation?

Managing infrastructure automatically (Correct answer)
Manual server setup
Ignoring infrastructure
Writing application code

Correct answer: Managing infrastructure automatically

Infrastructure automation involves using software and scripts to provision, configure, and manage IT infrastructure components like servers, networks, and databases, rather than performing these tasks manually. This approach ensures consistency, reduces human error, and significantly speeds up the deployment and scaling of environments. It is a cornerstone of modern DevOps practices, enabling environments to be treated as code.

Question 2: Which statement BEST describes the relationship between Certified DevOps Master certification and industry evolution?

Certification requirements never change
Requirements evolve periodically to reflect advances in knowledge and practice (Correct answer)
Requirements become less stringent over time
Changes only occur when government mandates them

Correct answer: Requirements evolve periodically to reflect advances in knowledge and practice

Certification requirements evolve to keep pace with professional and technological advances.

Question 3: In DevSecOps, what is a Software Composition Analysis (SCA) tool primarily used for?

Analyzing CPU composition of running services
Composing software release notes automatically
Decomposing monoliths into microservices
Identifying vulnerabilities in open-source libraries and dependencies (Correct answer)

Correct answer: Identifying vulnerabilities in open-source libraries and dependencies

SCA tools scan a project's dependencies and open-source libraries against vulnerability databases to identify known CVEs and license risks.

Question 4: How should Certified DevOps Master professionals handle equipment showing signs of malfunction during operation?

Immediately cease operation, secure the equipment, and report (Correct answer)
Attempt field repairs while running
Finish the current task first
Continue operating while monitoring

Correct answer: Immediately cease operation, secure the equipment, and report

Immediate cessation prevents safety hazards, further damage, or compromised results.

Question 5: Which practice involves automatically scanning container images for known vulnerabilities before they are pushed to a registry?

Network policy enforcement
Image vulnerability scanning (Correct answer)
Runtime threat detection
Secrets rotation

Correct answer: Image vulnerability scanning

Image vulnerability scanning (using tools like Trivy, Clair, or Snyk) checks container images against CVE databases before they reach the registry or production.

Question 6: What is the purpose of a Git tag, and how does it differ from a branch?

A tag marks a specific point in history as immutable; a branch is a movable pointer to commits (Correct answer)
Tags and branches are functionally identical in Git
A tag creates a new line of development; a branch does not
A tag is a temporary reference; a branch is permanent

Correct answer: A tag marks a specific point in history as immutable; a branch is a movable pointer to commits

Tags create a fixed, named reference to a specific commit (typically a release), while branches are mutable pointers that advance with each new commit.

Question 7: What is the MOST important reason for maintaining equipment maintenance logs in CDM practice?

To justify replacement budgets
To track maintenance history, predict failures, and demonstrate compliance (Correct answer)
To satisfy insurance requirements only
To assign blame when equipment fails

Correct answer: To track maintenance history, predict failures, and demonstrate compliance

Maintenance logs track history, predict failures, and demonstrate regulatory compliance.

Question 8: How should Certified DevOps Master professionals handle equipment showing signs of malfunction during operation?

Continue operating while monitoring
Finish the current task first
Attempt field repairs while running
Immediately cease operation, secure the equipment, and report (Correct answer)

Correct answer: Immediately cease operation, secure the equipment, and report

Immediate cessation prevents safety hazards, further damage, or compromised results.

Question 9: What is the PRIMARY purpose of obtaining CDM certification in Certified DevOps Master?

To guarantee employment
To demonstrate verified competency and adherence to professional standards (Correct answer)
To satisfy a personal achievement goal
To bypass educational requirements

Correct answer: To demonstrate verified competency and adherence to professional standards

Certification demonstrates verified competency and adherence to professional standards.

Question 10: In Certified DevOps Master practice, what is the CORRECT sequence when performing a technical procedure?

Document, execute, then plan
Plan, prepare, execute, verify, and document (Correct answer)
Execute, then plan and review
Execute immediately and document only if issues arise

Correct answer: Plan, prepare, execute, verify, and document

The correct sequence follows: plan, prepare, execute, verify, and document.

Question 11: Which tool is commonly used for configuration management?

Ansible (Correct answer)
Notepad
Photoshop
Excel

Correct answer: Ansible

Ansible is a popular open-source automation engine widely used for configuration management, application deployment, and orchestration. It operates agentlessly, using SSH to connect to target machines, and uses simple YAML syntax for its playbooks, making it relatively easy to learn and implement. Other common tools include Puppet, Chef, and SaltStack.

Question 12: How should Certified DevOps Master professionals handle procedures that have been updated or revised?

Continue using the original method
Only apply updates to new cases
Review updates, complete required training, and implement revised procedures (Correct answer)
Wait for mandatory enforcement

Correct answer: Review updates, complete required training, and implement revised procedures

Professionals must review changes, complete training, and implement revised procedures.

Question 13: What is 'infrastructure as code' (IaC)?

Physical hardware setup
Manual configuration
Writing application code
Infrastructure managed as code (Correct answer)

Correct answer: Infrastructure managed as code

Infrastructure as Code (IaC) is a practice where infrastructure (networks, virtual machines, databases, etc.) is provisioned and managed using machine-readable definition files, rather than through manual processes or interactive tools. These definition files are versioned, tested, and deployed just like application code. IaC brings the benefits of software development practices, such as version control, automated testing, and continuous integration, to infrastructure management, ensuring consistency and repeatability.

Question 14: Which factor MOST significantly affects the quality of technical outcomes in CDM practice?

The time of day
The brand of equipment
Speed of procedure completion
The practitioner's training, preparation, and attention to detail (Correct answer)

Correct answer: The practitioner's training, preparation, and attention to detail

Quality depends primarily on training, preparation, and attention to detail.

Question 15: Why is version control important in configuration management?

Delete previous versions
Ignore changes
Avoid documentation
Track and maintain configuration history (Correct answer)

Correct answer: Track and maintain configuration history

Version control is vital in configuration management because it allows teams to track every change made to configuration files and scripts over time. This provides a complete audit trail, enabling easy rollback to previous, stable configurations if a new change introduces issues. It also facilitates collaboration among team members on infrastructure definitions and ensures consistency across different environments.

Question 16: What distinguishes a Certified DevOps Master certified professional from a non-certified practitioner?

There is no meaningful difference
Certified professionals always have more experience
Certified professionals only work in larger organizations
Certification validates competency through standardized assessment against benchmarks (Correct answer)

Correct answer: Certification validates competency through standardized assessment against benchmarks

Certification provides objective validation of competency through standardized assessment.

Question 17: In DevOps, what is the key advantage of using short-lived feature branches over long-lived feature branches?

Short-lived branches require more documentation
Short-lived branches reduce merge conflicts and integrate feedback more frequently (Correct answer)
Short-lived branches eliminate the need for CI pipelines
Short-lived branches enforce stricter code review policies

Correct answer: Short-lived branches reduce merge conflicts and integrate feedback more frequently

Short-lived branches diverge from the main branch for a brief period, minimizing merge conflicts and enabling continuous integration of small, reviewable increments.

Question 18: In DevSecOps, what is the primary purpose of a Web Application Firewall (WAF)?

To filter, monitor, and block malicious HTTP traffic targeting web applications (Correct answer)
To manage TLS certificate issuance and renewal automatically
To load-balance traffic across multiple application instances
To encrypt data at rest in the application database

Correct answer: To filter, monitor, and block malicious HTTP traffic targeting web applications

A WAF sits in front of web applications and inspects HTTP/S traffic to block common exploits such as XSS, SQL injection, and OWASP Top 10 attacks.

Question 19: What role does calibration play in maintaining technical accuracy for Certified DevOps Master professionals?

It is only necessary for new equipment
It is optional for advanced professionals
It only matters during inspections
It ensures instruments produce accurate, consistent results over time (Correct answer)

Correct answer: It ensures instruments produce accurate, consistent results over time

Regular calibration ensures instruments continue producing accurate results over time.

Question 20: What is a common language for writing IaC templates?

JavaScript
YAML (Correct answer)
HTML
CSS

Correct answer: YAML

YAML (YAML Ain't Markup Language) is a human-friendly data serialization standard often used for configuration files and in applications where data is being stored or transmitted. Its readability and hierarchical structure make it a popular choice for defining Infrastructure as Code templates in tools like Ansible, Kubernetes, and AWS CloudFormation. While JSON is also used, YAML is frequently preferred for its cleaner syntax.

Question 21: What is the MOST effective way for new CDM professionals to build competency?

Studying certification materials exclusively
Focusing solely on advanced topics
Learning through trial and error
Combining formal education, mentored practice, and ongoing professional development (Correct answer)

Correct answer: Combining formal education, mentored practice, and ongoing professional development

Building competency requires formal education, mentored practice, and ongoing development.

Question 22: In Certified DevOps Master practice, what is the CORRECT sequence when performing a technical procedure?

Execute immediately and document only if issues arise
Execute, then plan and review
Plan, prepare, execute, verify, and document (Correct answer)
Document, execute, then plan

Correct answer: Plan, prepare, execute, verify, and document

The correct sequence follows: plan, prepare, execute, verify, and document.

Question 23: What is the FIRST step before operating any equipment in CDM practice?

Begin operation to test it
Conduct a pre-operation inspection and verify safety systems (Correct answer)
Ask a colleague if it seems okay
Read the manual only if issues occur

Correct answer: Conduct a pre-operation inspection and verify safety systems

Pre-operation inspection ensures visible damage is checked and safety systems verified.

Question 24: Which benefit does configuration management provide?

Consistency and repeatability (Correct answer)
Manual error increase
Random environment changes
Lack of documentation

Correct answer: Consistency and repeatability

Configuration management ensures that all systems and environments are configured identically and consistently according to defined standards. This eliminates configuration drift and 'snowflake' servers, making environments predictable and reliable. The ability to repeatedly deploy the same configuration across multiple servers or environments significantly reduces errors and simplifies troubleshooting.

Question 25: Which foundational principle is MOST important for success in Certified DevOps Master?

Commitment to continuous learning, ethical practice, and quality outcomes (Correct answer)
Maintaining minimum certification requirements
Maximizing financial returns
Specializing in only one narrow area

Correct answer: Commitment to continuous learning, ethical practice, and quality outcomes

Success requires continuous learning, ethical practice, and focus on quality outcomes.

Question 26: What is the primary purpose of a pull request (PR) in a collaborative Git workflow?

To notify the team of a new repository
To create a backup of a branch
To automatically merge code into production
To propose and review changes before merging into a target branch (Correct answer)

Correct answer: To propose and review changes before merging into a target branch

A pull request is a collaboration mechanism that allows developers to propose changes, discuss them, request reviews, and merge code only after approval.

Question 27: What distinguishes a Certified DevOps Master certified professional from a non-certified practitioner?

Certified professionals always have more experience
There is no meaningful difference
Certification validates competency through standardized assessment against benchmarks (Correct answer)
Certified professionals only work in larger organizations

Correct answer: Certification validates competency through standardized assessment against benchmarks

Certification provides objective validation of competency through standardized assessment.

Question 28: When documenting assessment findings in CDM practice, which approach is MOST appropriate?

Summarize verbally without written documentation
Include only positive findings
Record objective findings, measurements, and observations factually (Correct answer)
Use jargon only experts understand

Correct answer: Record objective findings, measurements, and observations factually

Assessment documentation must be objective, factual, and comprehensive.

Question 29: Which preventive maintenance approach is MOST effective for CDM professionals?

Fix equipment only when it breaks
Outsource all maintenance
Schedule regular maintenance based on manufacturer recommendations and usage (Correct answer)
Perform maintenance annually regardless of usage

Correct answer: Schedule regular maintenance based on manufacturer recommendations and usage

Scheduling based on manufacturer recommendations and usage patterns optimizes reliability.

Question 30: Why is automation important in configuration management?

Increase manual workload
Reduce errors and speed deployments (Correct answer)
Ignore consistency
Complicate processes

Correct answer: Reduce errors and speed deployments

Automation in configuration management eliminates manual intervention, which is a common source of human error. By automating tasks like provisioning, configuring, and updating systems, organizations can ensure consistency, reduce the likelihood of misconfigurations, and significantly accelerate the speed at which infrastructure changes and deployments can be executed. This leads to more reliable and efficient operations.

Question 31: What role does calibration play in maintaining technical accuracy for Certified DevOps Master professionals?

It is only necessary for new equipment
It ensures instruments produce accurate, consistent results over time (Correct answer)
It only matters during inspections
It is optional for advanced professionals

Correct answer: It ensures instruments produce accurate, consistent results over time

Regular calibration ensures instruments continue producing accurate results over time.

Question 32: What is 'drift' in configuration management?

Consistent systems
Deviation from desired state (Correct answer)
Perfect configuration
Immediate deployment

Correct answer: Deviation from desired state

In configuration management, 'drift' refers to the phenomenon where the actual configuration of a system or environment deviates from its intended or desired state, as defined by the configuration management system. This often occurs due to manual changes, ad-hoc updates, or unmanaged processes. Configuration drift can lead to inconsistencies, instability, and security vulnerabilities across systems.

Question 33: How does the CDM body of knowledge relate to daily professional practice?

It provides the foundational framework guiding decision-making and standard practices (Correct answer)
It is theoretical with limited application
It only applies during exams
It is only for academic research

Correct answer: It provides the foundational framework guiding decision-making and standard practices

The body of knowledge provides the framework guiding daily decision-making and practices.

Question 34: Which approach is MOST important for CDM professionals when applying technical procedures?

Adhering to established protocols while adapting to specific conditions (Correct answer)
Using the fastest method regardless of standards
Following personal shortcuts
Applying the same technique without variation

Correct answer: Adhering to established protocols while adapting to specific conditions

Technical procedures require adherence to protocols with professional judgment for adaptation.

Question 35: When new equipment is introduced in Certified DevOps Master, what is REQUIRED before staff use it?

Reading the manual independently
Watching a colleague use it once
Formal training, competency verification, and documentation (Correct answer)
A brief verbal overview

Correct answer: Formal training, competency verification, and documentation

Formal training, competency verification, and documented training completion are required.

Question 36: Which preventive maintenance approach is MOST effective for CDM professionals?

Schedule regular maintenance based on manufacturer recommendations and usage (Correct answer)
Outsource all maintenance
Perform maintenance annually regardless of usage
Fix equipment only when it breaks

Correct answer: Schedule regular maintenance based on manufacturer recommendations and usage

Scheduling based on manufacturer recommendations and usage patterns optimizes reliability.

Question 37: What is 'log sampling' and when is it most appropriate to use in a high-throughput system?

Replaying historical logs to reproduce incidents
Encrypting a random subset of logs for security testing
Recording only a fraction of log events to reduce storage and processing costs at very high volume (Correct answer)
Aggregating logs by hour instead of by event

Correct answer: Recording only a fraction of log events to reduce storage and processing costs at very high volume

Log sampling records a representative subset of events (e.g., 1 in 100) to manage cost and volume in systems generating millions of events per second.

Question 38: What is the MOST important reason for maintaining equipment maintenance logs in CDM practice?

To assign blame when equipment fails
To track maintenance history, predict failures, and demonstrate compliance (Correct answer)
To satisfy insurance requirements only
To justify replacement budgets

Correct answer: To track maintenance history, predict failures, and demonstrate compliance

Maintenance logs track history, predict failures, and demonstrate regulatory compliance.

Question 39: Which factor MOST significantly affects the quality of technical outcomes in CDM practice?

Speed of procedure completion
The time of day
The practitioner's training, preparation, and attention to detail (Correct answer)
The brand of equipment

Correct answer: The practitioner's training, preparation, and attention to detail

Quality depends primarily on training, preparation, and attention to detail.

Question 40: How does the CDM body of knowledge relate to daily professional practice?

It is theoretical with limited application
It only applies during exams
It provides the foundational framework guiding decision-making and standard practices (Correct answer)
It is only for academic research

Correct answer: It provides the foundational framework guiding decision-making and standard practices

The body of knowledge provides the framework guiding daily decision-making and practices.

Certified DevOps Master (CDM)

The CDM certification validates advanced expertise in implementing and managing DevOps practices across the full software lifecycle, including CI/CD pipelines, infrastructure automation, DevSecOps, deployment operations, and software architecture principles.

Questions

90 min

Time Limit

65%

To Pass

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

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gsdcouncil.org — Eligibility, exam format, passing score, retake policy, time limit, score validity, score release · verified Oct 2026