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

Increasing sprint velocity

Answer

Adding more manual approval gates

Answer

Expanding the QA team headcount

Question 2

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

Accepted Answer

ReplicaSet

Answer

StatefulSet

Answer

DaemonSet

Answer

ConfigMap

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

Running penetration tests after every major release

Answer

Hiring a dedicated security team to review code before deployment

Answer

Performing security audits quarterly

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

Storing service configuration in a centralized registry

Answer

Orchestrating container deployments across multiple clusters

Answer

Providing a shared database layer for microservices

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

Number of test cases written per sprint

Answer

Total CI pipeline execution time

Answer

Number of test engineers on the team

Question 6

A team uses blue-green deployment. What is the key infrastructure requirement for this strategy?

Accepted Answer

Two identical production environments with a traffic-switching mechanism

Answer

A single environment with automated rollback scripts

Answer

A canary environment receiving 5% of traffic

Answer

Multiple feature branches deployed simultaneously

Question 7

When implementing GitOps, which component acts as the single source of truth for the desired state of infrastructure?

Accepted Answer

A Git repository containing declarative configuration files

Answer

The CI/CD pipeline configuration

Answer

The current state of the Kubernetes cluster

Answer

An ITSM ticketing system