Theory · Agile & DevOps culture

14 min · Module 5 · Theory

How to study this topic

Read the theory below (concepts, bullets, and shell/YAML examples).
Try the Exam pool and Book quizzes in this module.
After each quiz, use Show answer on every question to review.

Agile & DevOps culture

DevOps unites development and operations through automation, measurement, and shared ownership. DORA metrics track delivery performance: deployment frequency, lead time, MTTR, change failure rate.

CI/CD: automate build, test, deploy — reduce manual toil.
Blameless postmortems: learn from incidents without punishing individuals.
Shift-left: testing and security early in the pipeline.

Shell, YAML & config examples

# DORA metrics (examples)
# - Deployment frequency: daily vs monthly
# - Lead time for changes: commit → production
# - MTTR: mean time to restore service
# - Change failure rate: % of deploys causing incidents

Hands-on practice: /lab/