KCNA Online Practice Questions and Answers

To specify a Kubernetes object which language is used?

A. JSON

B. Go

C. YAML

D. Node

E. Python

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

A. Gauge

B. Histogram

C. Summary

D. Counter

What Linux feature is used to provide isolation for containers?

A. Processes

B. Services

C. NetworkPolicy

D. Control groups

In Kubernetes, what is considered the primary cluster data source?

A. etcd (pronounce: esty-d)

B. api server

C. kubelet

D. scheduler

What is a benefits of Kubernetes federation?

A. Avoids scalability limits on pods and nodes

B. Creates highly available clusters in different regions

C. Low latency

Which CNCF project is the dominant project with respect to container registries

A. Envoy

B. Harbor

C. Kubernetes

D. Rook

Which of the following is an example of vertical scaling?

A. Using cluster autoscaler

B. Adding more resources (memory and/or cpu) to a kubernetes node

C. Adding more nodes to kubernetes cluster

D. Adding more replica pods to a deployment

The Kubernetes API provides an interface for storing objects. Which of the following describes the type of objects stored by the Kubernetes API?

A. Containers

B. REST

C. YAML

D. ETCD

Which kubernetes object do deployments use behind the scenes when they need to scale pods?

A. POD

B. Deployment

C. Horizontal pod autoscaler

D. Api Scheduler

E. Replicasets

The Kubernetes rolling update is used for __.

A. Updating a service

B. Scaling an application

C. Updating a deployment

Which of the following is not a stop on the cloud native trailmap?

A. Microservices

B. CI/CD

C. Containerization

D. Software distribution

Which of the following best describes the way kubernetes Role-based access control (RBAC) works?

A. Kubernetes does not do RBAC

B. Kubernetes RBAC states which users can perform which actions against which re- source

C. Kubernetes RBAC lists which operations on which resources are denied to users

D. Kubernetes RBAC is responsible for authenticating subjects such as users and groups

What is the command used to scale the application?

A. kubectl run

B. kubectl explain

C. kubectl scale

How to get the logs of the previously terminated nginx container from the web pod?

A. kubectl logs -p -c nginx web

B. kubectl logs nginx

C. kubectl logs -p -c web nginx

D. kubectl logs -f -c nginx web

Which of the following is an advantage a cloud-native microservices application has over monolithic applications?

A. Cloud-native microservices applications tend to be faster and more responsive than monolithic applications.

B. Cloud-native microservice applications tend to be easier to troubleshoot.

C. Cloud-native microservice applications tend to be easier to scale and perform updates on.