Exam (elaborations)
CKAD Prep Questions and Answers 2024
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Exam of 11 pages for the course CKAD at CKAD (CKAD Prep)
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CKAD PrepNode (minion) - answer machine, physical or virtual; kubelet runs on the node
Master node - answer node that manages a cluster
API Server - answerfront end for k8s cluster, accepts commands from tools including
CLI
etcd - answer distributed key-value store that contains all cluster metadata
Scheduler - answer distributes work across multiple nodes in a cluster
Controller - answermanages the health of the cluster by taking action when a pod or
node has gone down or is non-responsive
kubelet - answeragent that runs on a node and runs the containers and carries out
commands from the master
What components are on the master node? - answerkube-apiserver
controller
etcd
scheduler
How do I see the nodes in a cluster? - answerget nodes
How do I see cluster metadata? - answercluster-info
Pod - answercontainers are deployed inside pods; single application instance; smallest
object in k8s
helper container(s) - answercontainers that assist or accompany the primary application
containers. usually deployed in the same pod to share access to network or storage.
What is shared in a pod? - answernetwork, storage
kubectl run <name> --image <container> - answercreates a pod and runs the container
in the pod
How do I see the list of pods? - answerget pods
, 4 primary tags in k8s yml file - answerapiVersion
kind
metadata
spec
kind values and versions - answerPOD, v1
Service, v1
ReplicaSet, apps/v1
Deployment, apps/v1
what is metadata in a definition yaml? - answera yaml dictionary of names, labels, etc
Pod spec example - answerspec:
conatiners:
- name:
image:
True or False: A pod can contain multiple containers. - answerTrue
command to create object from a file - answercreate -f <file>
command to see object details - answerdescribe <type> <name>
replication controller - answerensures that a specified number of pod replicas are
running at any given time; older tech that is being replaced by replica set in
deployments
replica - answera replica of a pod
how do I use a replication controller for load balancing and scaling? - answer
replica set - answerensures that a specified number of pod replicas are running at any
given time
spec of replica controller - answerspec:
template: <pod spec>
replicas: <count>
command to list replication controllers - answerget rc
replica set spec - answertemplate: <pod def>
replicas: <count>
selector:
command to list replica sets - answerget rs
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