DOL DevOps Principles 2

Question 1

Which DevOps principle directly addresses the problem of 'it works on my machine' syndrome?

Accepted Answer

Environment parity

Answer

Environment parity ensures development, staging, and production environments are as identical as possible, eliminating environment-specific failures.

Question 2

A DevOps team notices that deployments are consistently failing on Fridays. According to DevOps principles, what is the BEST corrective action?

Accepted Answer

Increase deployment frequency and fix the pipeline

Answer

DevOps promotes increasing deployment frequency and improving the pipeline rather than imposing restrictions that slow delivery.

Question 3

What does the DevOps concept of 'shifting left' primarily mean?

Accepted Answer

Performing testing and security checks earlier in the development lifecycle

Answer

Shifting left means integrating testing, security, and quality checks as early as possible in development to catch issues sooner.

Question 4

In DevOps, what is the primary purpose of a 'post-mortem' after an incident?

Accepted Answer

Documenting systemic improvements to prevent recurrence

Answer

Blameless post-mortems focus on systemic improvements and learning rather than individual blame, fostering psychological safety.

Question 5

Which metric from the DORA research most directly measures how quickly a team can recover from a production failure?

Accepted Answer

Mean time to restore (MTTR)

Answer

MTTR (Mean Time to Restore) measures the average time to recover service after a production failure, reflecting team resilience.

(DOL) DevOps Leader Practice Test