Practice Test Geeks(KCNA) Kubernetes and Cloud Native Associate Practice Test
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Kubernetes Architecture & Components Flashcards

7 cards from real KCNA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Kubernetes Architecture & Components flashcards as text

  1. Which component is responsible for watching for newly created Pods with no assigned node and selecting a node for them to run on?

    Answer: kube-scheduler

    The kube-scheduler watches for newly created Pods and selects the best node for them based on resource requirements and constraints.

  2. What is the primary function of etcd in a Kubernetes cluster?

    Answer: Serving as a consistent and highly-available key-value store for all cluster data

    etcd is a distributed key-value store that serves as Kubernetes' backing store for all cluster state and configuration data.

  3. Which Kubernetes component runs on every node and ensures containers are running in a Pod?

    Answer: kubelet

    The kubelet is a node agent that runs on every node and ensures the containers described in PodSpecs are running and healthy.

  4. What does the Node Controller in kube-controller-manager do when a node becomes unreachable?

    Answer: Marks the node as NotReady and eventually evicts Pods after a timeout

    The Node Controller marks unreachable nodes as NotReady and, after a configurable eviction timeout (default 5 minutes), evicts Pods from those nodes.

  5. Which communication pattern does the kubelet use to report node and pod status?

    Answer: kubelet reports to the kube-apiserver via HTTPS

    The kubelet communicates with the kube-apiserver over HTTPS, both to receive Pod specs and to report status updates.

  6. In a highly available Kubernetes control plane, how is leader election typically handled for kube-controller-manager?

    Answer: One instance is elected leader via a lease object; others remain on standby

    kube-controller-manager uses leader election with Kubernetes Lease objects so only one instance is active at a time while others remain on standby.

  7. What is the role of the cloud-controller-manager in Kubernetes?

    Answer: Integrates cloud-provider-specific control logic separate from the core Kubernetes binary

    The cloud-controller-manager embeds cloud-specific control loops (node, route, service) to allow cloud providers to release features independently of the Kubernetes core.