DOL Cheat Sheet 2026

The 30 highest-yield DOL facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is correlation? → A statistical relationship between two variables
2. What is continuous delivery? → Automatically preparing code for release to production after passing tests
3. When implementing database migrations in a CI/CD pipeline, what approach prevents downtime during schema changes? → Apply forward-only, backward-compatible migrations so old and new code run simultaneously
4. What does 'flow efficiency' measure in a Lean DevOps context? → The proportion of time work is actively being processed versus total lead time
5. A company's security team operates as an external audit function that slows releases. How should a DevOps leader culturally transform this relationship? → Embed security engineers into delivery teams as partners (DevSecOps)
6. What does "Infrastructure as Code" (IaC) allow a DevOps team to do? → Provision and manage infrastructure using code and automation
7. What is a container in software deployment? → A lightweight, portable unit packaging an application with its dependencies
8. An organization's DevOps transformation stalls because middle managers feel threatened by reduced control. What is the most effective intervention? → Redefine middle manager roles as DevOps enablers and coaches
9. What is Infrastructure as Code (IaC)? → Managing infrastructure through machine-readable configuration files
10. What is monitoring in a DevOps context? → Continuously observing system performance to detect and resolve issues quickly
11. Which metric best indicates that DevOps cultural change is becoming self-sustaining rather than dependent on leadership mandates? → Teams proactively proposing and self-organizing process improvements
12. Which automation pattern is most appropriate for orchestrating complex, multi-step workflows that span multiple services? → Saga pattern with compensating transactions
13. Which leadership style is most effective when guiding a team through a high-uncertainty cloud-native migration? → Servant leadership — removing blockers while empowering engineers to own solutions
14. How should you manage time during a timed test? → Divide total time by questions and pace yourself, spending less on easy ones
15. How does the Lean concept of 'small batch sizes' improve software delivery outcomes? → It shortens feedback loops, reduces risk, and makes defects easier to isolate
16. A DevOps Leader wants to reduce the blast radius of a failed deployment. Which architectural pattern best supports this goal? → Implementing bulkhead patterns to isolate failures within service partitions
17. A DevOps transformation is stalling because middle managers fear losing control as teams gain autonomy. What is the most effective strategy to address this? → Reframe management roles from controllers to coaches who multiply team capability
18. What is the primary purpose of a disaster recovery (DR) plan in a DevOps cloud environment? → Ensuring systems can be restored within defined RTO and RPO targets after a failure
19. A DevOps Leader notices that infrastructure drift is causing inconsistencies between environments. Which tool category directly addresses this problem? → Infrastructure as Code (IaC) tools
20. A DevOps leader wants to implement a 'failure budget' concept. What does this primarily enable? → Balancing innovation velocity against reliability risk
21. Which approach best supports audit trail requirements in a DevOps environment? → Using immutable, centralized audit logs with access controls and retention policies
22. An organization wants to benchmark its DevOps maturity. Which framework is specifically designed to assess DevOps capabilities and improvement areas? → DORA DevOps Quick Check / State of DevOps Report metrics
23. What is the primary organizational risk of tying individual performance reviews to DevOps metric targets such as deployment frequency? → Metric gaming — teams optimize the measured number rather than the underlying outcome
24. A DevOps team notices that their deployment frequency has plateaued. Which improvement approach is BEST aligned with Lean principles? → Map the value stream to identify and eliminate waste
25. What is a microservices architecture? → An approach where an application is built as a collection of small, independent services
26. Which data box metric helps a team determine if a process step is the system constraint? → Cycle time compared to takt time
27. When automating multi-cloud deployments, which approach best ensures portability and avoids vendor lock-in? → Adopting cloud-agnostic IaC tools like Terraform with provider-abstracted modules
28. Which of the following BEST describes the concept of 'value stream' in DevOps? → The end-to-end sequence of steps required to deliver value to customers
29. A DevOps leader wants to enforce that no secrets are ever committed to the source repository. Which pipeline control is MOST effective? → Adding a pre-commit hook and a CI stage that scans for secrets using tools like Gitleaks
30. An organization wants to adopt an innovation framework that encourages small, safe-to-fail experiments. Which approach best fits? → Hypothesis-driven development with A/B testing