DOL Technical Expertise 2

Question 1

A DevOps team is experiencing high mean time to recovery (MTTR) after production incidents. Which technical practice most directly reduces MTTR?

Accepted Answer

Implementing feature flags for instant rollback

Answer

Feature flags allow teams to instantly disable a problematic feature in production without a full deployment, directly reducing MTTR.

Question 2

Which container orchestration concept ensures that a specified number of pod replicas are always running in Kubernetes?

Accepted Answer

ReplicaSet

Answer

A ReplicaSet maintains a stable set of replica pods running at any given time, automatically replacing pods that fail or are deleted.

Question 3

A DevOps Leader wants to implement shift-left security. Which practice best embodies this approach?

Accepted Answer

Integrating SAST tools directly into developer IDEs and CI pipelines

Answer

Integrating SAST (Static Application Security Testing) into IDEs and CI pipelines catches vulnerabilities at the earliest possible stage of development.

Question 4

What is the primary purpose of a service mesh in a microservices architecture?

Accepted Answer

Managing inter-service communication, observability, and security policies

Answer

A service mesh handles service-to-service communication concerns like load balancing, mTLS, retries, and distributed tracing transparently.

Question 5

Which metric best indicates the effectiveness of a DevOps team's automated testing strategy?

Accepted Answer

Percentage of defects caught in production vs. pre-production

Answer

The ratio of defects caught pre-production versus production directly measures how well automated tests prevent regressions from reaching users.

(DOL) DevOps Leader Practice Test

(DOL) DevOps Leader Practice Test

DOL Technical Expertise 2