KCNA Free Practice Test

What is the name for the tool that manages communication between pods, injects a sidecar proxy container into each pod and directs network traffic through the proxy container?

1. A. namespace
2. B. Deployment
3. C. Network policy
4. D. Service mesh
5. E. Service

Correct Answer: D

What are container runtimes with Kubernetes?

1. A. CRI-O
2. B. lxd
3. C. containerd
4. D. Dockershim

Correct Answer: AC
https://kubernetes.io/docs/setup/production-environment/container-runtimes/ Graphical user interface, text, application, email Description automatically generated

What is the main difference between Argo vs. Flux CD?

1. A. Argo is pull-based, and Flux is push-based
2. B. No difference; both are pull-based
3. C. Argo is push-based, and Flux is pull-based
4. D. No difference; both are push-based

Correct Answer: C
AgroCD:
https://argo-cd.readthedocs.io/en/stable/developer-guide/ci/#can-i-retrigger-the-checks-without-pushing-a-new-c
FluxCD: https://fluxcd.io/

Which prometheus metric type represents a single number value that can increase and decrease over time?

1. A. Gauge
2. B. Histogram
3. C. Summary
4. D. Counter

Correct Answer: A
https://prometheus.io/docs/concepts/metric_types/#gauge Graphical user interface, text Description automatically generated

An application that is nearing its usage limit. To increase the amount of users it can handle, you allo-cate additional memory resources to each instance of the application. What type of scaling is this?

1. A. Horizontal Scaling
2. B. Cluster Autoscaling
3. C. Recursive Scaling
4. D. Vertical Scaling

Correct Answer: D
Graphical user interface, diagram Description automatically generated