703.1 Kubernetes Architecture and Usage (weight: 4) DEVOPS-TOOLS-ENGINEER Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What is the purpose of a ServiceAccount in Kubernetes?

   • ATo define network policies for pods
   • BTo store passwords and tokens for external services
   • CTo provide an identity for pods to authenticate with the Kubernetes API server
   • DTo limit the CPU and memory usage of a pod
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   A team runs a web application using a Deployment with three replicas. They notice that one of the pods is frequently restarted due to a crash. The team wants to ensure that the application remains available even if one pod crashes. Which action should they take?

   • ACreate a Service of type LoadBalancer
   • BChange the Deployment to a StatefulSet
   • CAdd a liveness probe to the Deployment
   • DIncrease the number of replicas in the Deployment
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   Which Kubernetes Service type provides a stable virtual IP address that is only reachable from within the cluster?

   • ALoadBalancer
   • BNodePort
   • CClusterIP
   • DExternalName
   Reveal Solution Discussion Select an answer first
5. 19expert · hard

   A cluster administrator is planning a cluster upgrade. The cluster runs a mix of workloads, including some that are not replicated and are sensitive to downtime. The administrator wants to minimize the risk of data loss and ensure that critical workloads are not disrupted during the upgrade. Which approach should the administrator take?

   • ABack up etcd before the upgrade and use PodDisruptionBudgets for critical workloads
   • BSkip the etcd backup because the upgrade process handles it automatically
   • CDrain all nodes at the same time to speed up the process
   • DUpgrade all nodes simultaneously to reduce the maintenance window
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A cluster administrator needs to perform maintenance on a worker node, which requires rebooting the node. The administrator wants to ensure that the pods running on that node are gracefully terminated and rescheduled to other nodes without downtime. Which sequence of steps should the administrator follow?

   • AReboot the node directly without any preparation
   • BCordon the node, perform maintenance, then uncordon the node
   • CDelete all pods on the node manually, then reboot
   • DDrain the node, perform maintenance, then uncordon the node
   Reveal Solution Discussion Select an answer first