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Linux Foundation KCNA Dumps Collection & Reliable KCNA Exam Pdf

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Linux Foundation has been providing certification exams to individuals who want to demonstrate their expertise in open source technologies. One of their newest offerings is the KCNA (Kubernetes and Cloud Native Associate) Certification Exam. KCNA Exam is designed for individuals who want to prove their knowledge and skills in cloud native computing and Kubernetes.

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Linux Foundation Kubernetes and Cloud Native Associate Sample Questions (Q108-Q113):

NEW QUESTION # 108
Consider a pod with a "readinessProbe" that checks for a specific file existence. Explain what happens if the probe fails repeatedly, and how it affects the pod's lifecycle.

A. The pod will be marked as "unhealthy", but will continue to run.
B. The pod will be rescheduled to a different node in the cluster.
C. The pod will be automatically restarted.
D. The pod will be terminated and removed from the cluster.
E. The pod will be automatically scaled down.

Answer: A

Explanation:
If the "readinessProbe" fails repeatedly, the pod will be marked as "unhealthy", but it will continue to run. The "readinessProbe" is responsible for ensuring that the pod is ready to receive traffic. If the probe fails, it indicates that the pod is not yet ready, and Kubernetes will not direct traffic to it. The pod will not be restarted, terminated, rescheduled, or scaled down. It will remain in an unhealthy state, and traffic will only be directed to it once the probe starts succeeding. This allows the pod to continue running while it resolves the issue causing the probe failures.

NEW QUESTION # 109
You're building a new cloud-native application using gRPC for communication between microservices. You want to use Jaeger for distributed tracing to track the flow of requests through your microservices. What should you do to integrate Jaeger with your gRPC application?

A. Configure a custom gRPC interceptor to intercept gRPC calls and emit tracing data to Jaeger.
B. Modify your gRPC client and server code to explicitly log trace information using Jaeger's logging libraries.
C. Use a dedicated tracing proxy that sits between your gRPC services and intercepts traffic to send tracing data to Jaeger.
D. Use Jaeger's built-in support for gRPC tracing, which automatically intercepts gRPC calls and sends data to Jaeger.
E. Configure Istio to automatically inject tracing into gRPC calls and send the data to Jaeger.

Answer: D,E

Explanation:
The correct answers are B and D . Jaeger provides built-in support for tracing gRPC applications, and Istio can also be used to automatically inject tracing into gRPC calls. B: Use Jaeger's built-in support for gRPC tracing, which automatically intercepts gRPC calls and sends data to Jaeger. Jaeger offers libraries and integration points for popular frameworks like gRPC. Using Jaeger's gRPC tracing capabilities, you can automatically instrument your gRPC applications and capture tracing data without needing to manually modify your code extensively. D: Configure Istio to automatically inject tracing into gRPC calls and send the data to Jaeger. Istio, a service mesh, offers automatic tracing capabilities for gRPC applications. By configuring Istio, you can enable tracing for gRPC calls and send tracing data to Jae er streamlinin the tracin rocess and reducin code modifications within our services. The other options are incorrect or less efficient: A: Configure a custom gRPC interceptor to intercept gRPC calls and emit tracing data to Jaeger. While you can create a custom interceptor, Jaeger's built-in support and Istio's automatic tracing mechanisms are more convenient and often preferred for gRPC tracing. C: Modify your gRPC client and server code to explicitly log trace information using Jaeger's logging libraries. Manual code modifications are less efficient compared to using Jaeger's built-in support or Istio's automatic tracing. E: Use a dedicated tracing proxy that sits between your gRPC services and intercepts traffic to send tracing data to Jaeger. While a tracing proxy could work, it adds an extra layer of complexity and potential performance overhead compared to built-in support or Istio's integration.

NEW QUESTION # 110
You need to restrict access to your Kubernetes cluster from a specific IP address range. How would you implement this security measure?

A. Create a custom Admission Controller to filter requests based on the source P
B. Configure a NetworkPolicy to allow traffic only from the specified IP range.
C. Use kubectl to modify the Kubernetes API server's authorization settings.
D. Use a Service of type 'LoadBalancer' with a specific IP address to restrict access.
E. Configure firewall rules on the Kubernetes nodes to block traffic from unauthorized IP ranges.

Answer: B

Explanation:
The most appropriate way to restrict access to a Kubernetes cluster from a specific IP address range is to configure a NetworkPolicy. NetworkPolicies allow you to define ingress and egress rules based on source and destination IP addresses, ports, and other network attributes. This provides a flexible and granular way to control network traffic to and from pods within the cluster. Options B, C, and D are not suitable for this scenario as they focus on API server authorization, admission control, or node-level firewall rules, which are not specifically designed for IP address-based access control. Option E is incorrect because Service of type 'LoadBalancer' primarily deals with external access and doesn't provide direct IP address-based access control within the cluster-

NEW QUESTION # 111
Which organizational persona creates Service Level Agreements 'SLA', Service Level Objectives 'SLO', and Service Level Indicator 'SLI'?

A. DevSecOps
B. Developer
C. DevOps
D. Security and Compliance Engineer
E. Site Reliability Engineer (SRE)

Answer: E

Explanation:
SREs create SLAs, SLOs, and SLIs to define and implement standards for application and infra-structure reliability.

NEW QUESTION # 112
A ________ is a ready-to-run software package, containing everything needed to run an application.

A. Container Image
B. Container Runtime
C. Container Repository
D. Docker

Answer: A

Explanation:
https://kubernetes.io/docs/concepts/containers/#container-images

NEW QUESTION # 113
......

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