KCNA Practice Test

KCNA Practice Test practice questions, page 2 of 14, with answer review and explanations.

Question 6

Let's assume that an organization needs to process large amounts of data in bursts, on a cloud-based Kubernetes cluster. For instance: each Monday morning, they need to run a batch of 1000 compute jobs of 1 hour each, and these jobs must be completed by Monday night. What's going to be the most cost-effective method?

  1. Run a group of nodes with the exact required size to complete the batch on time, and use a combination of taints, tolerations, and nodeSelectors to reserve these nodes to the batch jobs.
  2. Leverage the Kubernetes Cluster Autoscaler to automatically start and stop nodes as they're needed.
  3. Commit to a specific level of spending to get discounted prices (with e.g. “reserved instances” or similar mechanisms).
  4. Use PriorityСlasses so that the weekly batch job gets priority over other workloads running on the cluster, and can be completed on time.

Question 7

What is a Kubernetes service with no cluster IP address called?

  1. Headless Service
  2. Nodeless Service
  3. IPLess Service
  4. Specless Service

Question 8

CI/CD stands for:

  1. Continuous Information / Continuous Development
  2. Continuous Integration / Continuous Development
  3. Cloud Integration / Cloud Development
  4. Continuous Integration / Continuous Deployment

Question 9

What default level of protection is applied to the data in Secrets in the Kubernetes API?

  1. The values use AES Symmetric Encryption
  2. The values are stored in plain text
  3. The values are encoded with SHA256 hashes
  4. The values are base64 encoded

Question 10

What function does kube-proxy provide to a cluster?

  1. Implementing the Ingress resource type for application traffic.
  2. Forwarding data to the correct endpoints for Services.
  3. Managing data egress from the cluster nodes to the network.
  4. Managing access to the Kubernetes API.