CDM Continuous Integration & Continuous Delivery 3

Question 1

What is the key difference between Continuous Delivery and Continuous Deployment?

Accepted Answer

Continuous Delivery requires a manual approval before production release; Continuous Deployment releases automatically

Answer

In Continuous Delivery a human must approve the final production push, while Continuous Deployment automatically releases every passing build to production.

Question 2

Which technique allows a new version to serve a small percentage of production traffic while the old version handles the rest?

Accepted Answer

Canary Release

Answer

A canary release routes a small slice of real production traffic to the new version so risk is limited while real-world validation occurs.

Question 3

A team's CI build takes 45 minutes, causing developers to avoid committing frequently. What is the best remediation?

Accepted Answer

Parallelize test execution and split the pipeline into fast and slow test suites

Answer

Parallelizing tests and separating fast unit tests from slower integration tests dramatically reduces feedback time without sacrificing coverage.

Question 4

What is the purpose of using immutable infrastructure in a CD pipeline?

Accepted Answer

To ensure servers are never modified after deployment; new versions always replace old ones

Answer

Immutable infrastructure means deployed instances are never modified; rollbacks and updates are performed by replacing instances with new ones built from a known-good image.

Question 5

Which practice ensures that database schema changes do not break a CI/CD pipeline during a zero-downtime deployment?

Accepted Answer

Using backward-compatible, multi-phase migrations (expand/contract pattern)

Answer

The expand/contract pattern adds new schema elements before the application update and removes old ones after, allowing both old and new code to run simultaneously.

(CDM) Certified DevOps Master Practice Test

(CDM) Certified DevOps Master Practice Test

CDM Continuous Integration & Continuous Delivery 3