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Linux Foundation Certification
KCSA Exam
LinuxFoundation.KCSA.v2026-03-21.q21 Dumps

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Question 1

A user runs a command with kubectl to apply a change to a deployment. What is the first Kubernetes component that the request reaches?

A.Kubernetes Controller Manager
B.Kubernetes API Server
C.Kubernetes Scheduler
D.kubelet

Correct Answer: B

* Allkubectl requestsgo to theKubernetes API Server.
* The API server is thefront-end of the control planeand validates/authenticates requests before other components act.
* Exact extract (Kubernetes Docs - Components):
* "The API server is a component of the Kubernetes control plane that exposes the Kubernetes API. It is the front end for the Kubernetes control plane."
* Other options clarified:
* Controller Manager: reconciles state after API Server processes the request.
* Scheduler: assigns Pods to nodes after API Server accepts workload objects.
* kubelet: node agent, only communicates after API Server updates desired state.
References:
Kubernetes Docs - Components: https://kubernetes.io/docs/concepts/overview/components/

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Question 2

A cluster is failing to pull more recent versions of images from k8s.gcr.io. Why may this be?

A.There is a network connectivity issue between the cluster and k8s.gcr.io.
B.There is a bug in the container runtime or the image pull process.
C.The authentication credentials for accessing k8s.gcr.io are incorrectly scoped.
D.The container image registry k8s.gcr.io has been deprecated.

Correct Answer: D

* k8s.gcr.iowas the historic Kubernetes image registry.
* It has beendeprecatedand replaced withregistry.k8s.io.
* Exact extract (Kubernetes Blog):
* "The k8s.gcr.io image registry will be frozen from April 3, 2023 and fully deprecated. All Kubernetes project images are now served from registry.k8s.io."
* Pulling newer versions from k8s.gcr.io fails because the registry no longer receives updates.
References:
Kubernetes Blog - Image Registry Update: https://kubernetes.io/blog/2023/02/06/k8s-gcr-io-freeze- announcement/

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Question 3

Which of the following statements best describes the role of the Scheduler in Kubernetes?

A.The Scheduler is responsible for monitoring and managing the health of the Kubernetes cluster.
B.The Scheduler is responsible for ensuring the security of the Kubernetes cluster and its components.
C.The Scheduler is responsible for managing the deployment and scaling of applications in the Kubernetes cluster.
D.The Scheduler is responsible for assigning Pods to nodes based on resource availability and other constraints.

Correct Answer: D

* TheKubernetes Schedulerassigns Pods to nodes based on:
* Resource requests & availability (CPU, memory, GPU, etc.)
* Constraints (affinity, taints, tolerations, topology, policies)
* Exact extract (Kubernetes Docs - Scheduler):
* "The scheduler is a control plane process that assigns Pods to Nodes. Scheduling decisions take into account resource requirements, affinity/anti-affinity, constraints, and policies."
* Other options clarified:
* A: Monitoring cluster health is theController Manager's/kubelet's job.
* B: Security is enforced throughRBAC, admission controllers, PSP/PSA, not the scheduler.
* C: Deployment scaling is handled by theController Manager(Deployment/ReplicaSet controller).
References:
Kubernetes Docs - Scheduler: https://kubernetes.io/docs/concepts/scheduling-eviction/kube-scheduler/

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Question 4

An attacker has access to the network segment that the cluster is on.
What happens when a compromised Pod attempts to connect to the API server?

A.The compromised Pod is automatically isolated from the network to prevent any connections to the API server.
B.The compromised Pod is allowed to connect to the API server without any restrictions.
C.The compromised Pod attempts to connect to the API server, but its requests may be blocked due to network policies.
D.The compromised Pod connects to the API server and is granted elevated privileges by default.

Correct Answer: C

* By default,Pods can connect to the API server(since ServiceAccount tokens are mounted).
* However, whether they succeed in acting depends on:
* Network Policies(may block egress).
* RBAC(controls permissions).
* Exact extract (Kubernetes Docs - API Access):
* "Pods authenticate to the API server using the service account token mounted into the Pod.
Authorization is then enforced by RBAC. NetworkPolicies may further restrict access."
* Clarifications:
* A: No default automatic isolation.
* B: Not always unrestricted; policies may apply.
* D: Pods get minimal default privileges, not automatic elevation.
References:
Kubernetes Docs - API Access to Pods: https://kubernetes.io/docs/concepts/security/service-accounts/ Kubernetes Docs - Network Policies: https://kubernetes.io/docs/concepts/services-networking/network- policies/

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Question 5

What was the name of the precursor to Pod Security Standards?

A.Container Runtime Security
B.Kubernetes Security Context
C.Container Security Standards
D.Pod Security Policy

Correct Answer: D

* Kubernetes originally had a feature calledPodSecurityPolicy (PSP), which provided controls to restrict pod behavior.
* Official docs:
* "PodSecurityPolicy was deprecated in Kubernetes v1.21 and removed in v1.25."
* "Pod Security Standards (PSS) replace PodSecurityPolicy (PSP) with a simpler, policy- driven approach."
* PSP was often complex and hard to manage, so it was replaced by Pod Security Admission (PSA) which enforcesPod Security Standards.
References:
Kubernetes Docs - PodSecurityPolicy (deprecated): https://kubernetes.io/docs/concepts/security/pod- security-policy/ Kubernetes Blog - PodSecurityPolicy Deprecation: https://kubernetes.io/blog/2021/04/06/podsecuritypolicy- deprecation-past-present-and-future/

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