CDM Continuous Integration & Continuous Delivery 5

Question 1

Which strategy minimizes deployment risk by maintaining two identical production environments and switching traffic between them?

Accepted Answer

Blue-Green Deployment

Answer

Blue-Green deployment keeps a live (blue) and an idle (green) environment; after validating the new version in green, traffic is instantly switched, enabling instant rollback by switching back.

Question 2

What is the DevOps concept of 'fast feedback' primarily designed to address?

Accepted Answer

Minimizing the delay between introducing a defect and discovering it so fixes remain cheap

Answer

Fast feedback loops ensure developers learn about defects within minutes of introducing them, when the code context is fresh and the fix is trivial.

Question 3

A pipeline stage runs static code analysis and reports 500 warnings but the build still passes. What is the most appropriate improvement?

Accepted Answer

Define quality gates that fail the build when warnings exceed a defined threshold

Answer

Quality gates enforce that static analysis results meet a threshold; without enforced gates, warnings accumulate and the tool provides no real quality control.

Question 4

What is a 'release train' model in the context of CD?

Accepted Answer

A deployment technique where changes are batched and released on a fixed schedule regardless of individual feature readiness

Answer

A release train deploys on a fixed cadence (e.g., every two weeks); features ready by the cutoff ride the train, others wait for the next one.

Question 5

Which practice in CI ensures that the integration of all developer changes does not produce a 'broken build' that blocks the entire team?

Accepted Answer

Using feature flags to hide incomplete work and committing to the mainline frequently

Answer

Feature flags allow developers to merge incomplete code to the mainline without exposing it to users, enabling frequent integration while keeping the build green.

(CDM) Certified DevOps Master Practice Test

(CDM) Certified DevOps Master Practice Test

CDM Continuous Integration & Continuous Delivery 5