CDM DevOps Principles & Culture 4 — Questions and Answers
Question 1: Which concept describes the practice of running experiments in production to verify system behavior under real conditions?
- Blue-green deployment
- Chaos engineering (Correct answer)
- Canary analysis
- Feature toggles
Correct answer: Chaos engineering
Chaos engineering deliberately introduces failures in production to expose weaknesses before they cause unplanned outages.
Question 2: What does the DevOps principle of 'continuous feedback' primarily aim to achieve?
- Automate all human communication
- Shorten the feedback loop between production and development teams (Correct answer)
- Replace sprint retrospectives with dashboards
- Eliminate customer support tickets
Correct answer: Shorten the feedback loop between production and development teams
Continuous feedback shortens the cycle between observing production behavior and acting on that information to improve the system.
Question 3: A team practicing 'you build it, you run it' (YBIYRI) is adopting which DevOps principle?
- Centralized operations ownership
- Developer accountability for production systems (Correct answer)
- Separation of concerns between Dev and Ops
- Compliance-driven release management
Correct answer: Developer accountability for production systems
YBIYRI gives development teams end-to-end ownership of their services, including production operations.
Question 4: Which type of organizational structure does DevOps most strongly advocate against?
- Cross-functional product teams
- Siloed functional departments (Correct answer)
- Embedded operations engineers
- Site reliability engineering teams
Correct answer: Siloed functional departments
DevOps opposes siloed functional departments where Dev, Ops, Security, and QA operate with separate goals and handoffs.
Question 5: In Lean thinking applied to DevOps, 'waste' most commonly refers to which of the following?
- Unused compute resources
- Any activity that does not add customer value (Correct answer)
- Code that is not deployed to production
- Team members not assigned to projects
Correct answer: Any activity that does not add customer value
Lean defines waste as any activity consuming resources without adding value to the customer, such as waiting, rework, or excess process.
Question 6: What is the primary goal of implementing feature flags (feature toggles) in a DevOps pipeline?
- Enforce role-based access to admin features
- Decouple feature deployment from feature release (Correct answer)
- Reduce the size of deployable artifacts
- Automate A/B test statistical analysis
Correct answer: Decouple feature deployment from feature release
Feature flags allow code to be deployed to production while keeping features hidden, enabling controlled rollouts independent of deployments.
Question 7: Which DORA metric measures the percentage of deployments that result in a production failure requiring a fix?
- Mean time to restore
- Deployment frequency
- Change failure rate (Correct answer)
- Lead time for changes
Correct answer: Change failure rate
Change failure rate tracks what proportion of production changes result in degraded service or require remediation.
CDM DevOps Principles & Culture 4
Which concept describes the practice of running experiments in production to verify system behavior under real conditions?