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| Certification Vendor: | Linux Foundation |
|---|---|
| Exam Name: | Kubernetes and Cloud Native Associate (KCNA) Exam |
| Exam Number: | KCNA |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Exam Format: | Multiple choice, Multiple select, Online proctored exam |
| Real Exam Qty: | Approximately 60 |
| Passing Score: | 75% |
| Exam Price: | $250 USD |
| Related Certifications: | Certified Kubernetes Application Developer (CKAD) Certified Kubernetes Administrator (CKA) Certified Kubernetes Security Specialist (CKS) |
| Certificate Validity Period: | 3 years |
| Recommended Training: | Cloud Native Fundamentals / KCNA Preparation courses Introduction to Kubernetes (LFS158) |
| Exam Registration: | KCNA Exam Page Linux Foundation Certification Portal |
| Sample Questions: | Linux Foundation KCNA Sample Questions |
| Exam Way: | Online proctored exam |
| Pre Condition: | No formal prerequisites; basic understanding of cloud, containers, and Kubernetes concepts is recommended |
| Official Syllabus URL: | https://training.linuxfoundation.org/certification/kubernetes-cloud-native-associate-kcna/ |
>> Practical KCNA Information <<
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Linux Foundation KCNA Exam is a certification program that validates an individual’s knowledge of Kubernetes and cloud-native technologies. KCNA exam is designed to be challenging and is suitable for IT professionals who are interested in working with these technologies. Kubernetes and Cloud Native Associate certification is recognized by leading companies in the tech industry and can help individuals advance their career and increase their earning potential. Candidates are encouraged to prepare thoroughly before attempting the exam to ensure success.
NEW QUESTION # 46
You are building a CI/CD pipeline to deploy a Java application to Kubernetes. The application requires a specific Java version and some libraries to run correctly. How would you ensure that the correct runtime environment is available in the Kubernetes cluster?
Answer: C,D
Explanation:
The most common approaches are to include the required Java and libraries within the Dockerfile to create a self-contained image, or to use Kubernetes Init Containers. Init containers run before the main application container, installing the dependencies, ensuring the proper runtime environment is available.
NEW QUESTION # 47
You are running a distributed database service in Kubernetes. The database requires secure communication between its pods and external clients. What Kubernetes networking features can you leverage to achieve this?
Answer: C,D,E
Explanation:
The correct answers are A, D, and E. - A: Using a 'LoadBalancer' with TLS termination allows secure communication between external clients and the database service through an encrypted HTTPS connection. - D Implementing mutual TLS authentication between database pods and clients ensures that only authorized clients can access the database, further enhancing security. - E. Combining 'Services', 'Ingress', and TLS termination can provide comprehensive security for external access to the database service. This allows you to manage ingress traffic with
'Ingress' resources and secure the connection with TLS termination on the 'LoadBalancer' or ingress controller. While 'NetworkPolicies' can help control network traffic, they cannot directly enforce encryption. 'Custom network plugins' can implement specific encryption features, but they might require more complex configuration and integration. The best approach is to use a combination of Kubernetes features to achieve secure communication between pods and external clients.
NEW QUESTION # 48
When a Kubernetes Secret is created, how is the data stored by default in etcd?
Answer: C
Explanation:
By default, Kubernetes stores Secret data in etcd as Base64-encoded values, which only provides simple encoding for data transport and serialization but does not provide encryption or security against unauthorized access.
NEW QUESTION # 49
What is the main role of the CoreDNS within a cluster?
Answer: B
Explanation:
CoreDNS serves as the internal DNS service for a Kubernetes cluster, providing stable and consistent DNS names for Services and Pods so workloads can reliably discover and communicate with each other.
NEW QUESTION # 50
Which of the following systems is NOT compatible with the CRI runtime interface standard?
(Typo corrected: "CRI-0" → "CRI-O")
Answer: D
Explanation:
Kubernetes uses the Container Runtime Interface (CRI) to support pluggable container runtimes. The kubelet talks to a CRI-compatible runtime via gRPC, and that runtime is responsible for pulling images and running containers. In this context, containerd and CRI-O are CRI-compatible container runtimes (or runtime stacks) used widely with Kubernetes, and dockershim historically served as a compatibility layer that allowed kubelet to talk to Docker Engine as if it were CRI (before dockershim was removed from kubelet in newer Kubernetes versions). That leaves systemd as the correct "NOT compatible with CRI" answer, so C is correct.
systemd is an init system and service manager for Linux. While it can be involved in how services (like kubelet) are started and managed on the host, it is not a container runtime implementing CRI. It does not provide CRI gRPC endpoints for kubelet, nor does it manage containers in the CRI sense.
The deeper Kubernetes concept here is separation of responsibilities: kubelet is responsible for Pod lifecycle at the node level, but it delegates "run containers" to a runtime via CRI. Runtimes like containerd and CRI-O implement that contract; Kubernetes can swap them without changing kubelet logic. Historically, dockershim translated kubelet's CRI calls into Docker Engine calls. Even though dockershim is no longer part of kubelet, it was still "CRI-adjacent" in purpose and often treated as compatible in older curricula.
Therefore, among the provided options, systemd is the only one that is clearly not a CRI-compatible runtime system, making C correct.
NEW QUESTION # 51
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