Implement Probes and Health Checks CKAD Practice Questions (Page 4)

Questions 16–19

1. 16application · medium

   A team deploys a legacy Java application that occasionally deadlocks, leaving the process alive but unresponsive to HTTP requests. The container image includes a shell script at /healthz that returns exit code 0 when the application can serve traffic and non-zero otherwise. The team wants Kubernetes to automatically restart the container when the application stops responding. Which probe configuration should be added to the container spec?

   • AlivenessProbe with exec command ["/bin/sh", "-c", "/healthz"] and periodSeconds: 10
   • BreadinessProbe with exec command ["/bin/sh", "-c", "/healthz"] and periodSeconds: 10
   • CstartupProbe with exec command ["/bin/sh", "-c", "/healthz"] and periodSeconds: 10
   • DlivenessProbe with httpGet path /healthz and port 8080
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   What is the primary purpose of a readiness probe in a Kubernetes pod?

   • ATo delay the start of the liveness probe until the container is fully initialized.
   • BTo restart the container when it becomes unresponsive.
   • CTo determine whether the container is ready to accept traffic and include it in Service endpoints.
   • DTo measure the container's CPU and memory usage for autoscaling decisions.
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4. 18foundation · easy

   Which kubelet action is triggered when a liveness probe fails repeatedly beyond the failureThreshold?

   • AThe pod is marked as NotReady and removed from Service endpoints.
   • BThe container's image is pulled again to refresh the running process.
   • CThe container is killed and restarted according to the pod's restartPolicy.
   • DThe node is cordoned and the pod is evicted to another node.
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5. 19application · medium

   A team runs a gRPC-based microservice that does not expose an HTTP health endpoint. The service listens on TCP port 50051. The team wants to ensure that the pod is only added to the Service endpoints when the gRPC server is actually listening. Which probe configuration should be used?

   • AstartupProbe with tcpSocket port 50051 and periodSeconds: 5
   • BlivenessProbe with tcpSocket port 50051 and periodSeconds: 5
   • CreadinessProbe with httpGet path /healthz and port 50051
   • DreadinessProbe with tcpSocket port 50051 and periodSeconds: 5
   Reveal Solution Discussion Select an answer first