Which feature in Kubernetes assigns pods to a node at runtime?
service discovery
container scheduling
scalability and availability
flexibility and modularization
Why do organizations use containers?
to tie infrastructure to the entire guest operating systems with an unshared kernel
to build a larger ecosystem of a collection of Docker images in the Docker Hub
to build legacy applications to use in macroservices-based architecture
to build applications to incorporate a microservices-based architecture
Which statement is true regarding the difference between a virtual machine and a container?
A container includes all the binaries and libraries that would exist on the OS.
A container includes many applications.
The terms container and virtual machine are used interchangeably.
A container shares the kernel with other containers.
How would you best describe Kubernetes?
a subscription platform designed to manually deploy scaling and operating applications within containers
an open-source platform designed for manually deploying, scaling, and operating application containers
a subscription platform designed to automate deploying, scaling, and operating application containers
an open-source platform designed to automate deploying, scaling, and operating application containers
Two features that allow Kubernetes Clusters to scale are _____ and _____.
flexibility; application upgrades
registration; discovery
persistent storage; modularity
scalability; availability
In a Kubernetes model, what is the simplest unit that you can interact with that represents one running process in your cluster?
a container
a kublete
a pod
a node
Where do applications operate within Kubernetes?
Worker nodes
Scheduler
API Server
Pods
Review the Kubernetes architecture in the image below. Which process handles load balancing, network routing, and connection forwarding for applications?
the kubectl process
the Controller Manager process
the kubelet process
the kube-proxy process
When a pod has been scheduled on a node, and all of its containers are created, which pod life cycle is represented?
Succeeded
Running
Pending
Failed
Why will you create deployments more than anything else?
Most applications require scaling deployments.
Most applications are package deployments.
Most deployments are scaling a ReplicaSet.
Most deployments are package applications.
In which scenario would using namespaces be a great concept?
in a large enterprise where there is one team and many users
in a small organization where there are many teams with one user
in a large enterprise where there are many users and teams
in a small organization where there is one team and one user
What is the purpose of the Podspec YAML file?
The kubelet ensures that the containers described in the Podspecs are running and healthy.
The kubelet uses the Podspecs to ensure the health of containers running on the node that were not created by the API server.
The API server uses the Podspecs to deploy containers to worker nodes.
How can you verify that Minikube and VirtualBox are talking to each other?
Run the command kubectl get nodes.
Run the command kubectl get runs.
Run the command kubectl get deployments.
Run the command kubectl get services.
Which resource or resources are created in Kubernetes after creating an application resource?
the application resource
A pod is created, along with the deployment and an associated ReplicaSet with statuses for each.
the service and NodePort
the nodes
How can you combine the deployment and the service yaml into a single yaml file?
Run the command vi helloworld-service.yml.
Run the command vi helloworld-all.yml.
Run the command vi helloworld-deployment.yml.
Run the command vi helloworld-run.yml.
If you are in Windows and using Powershell, the command docker version will check that _____.
the Docker version is out of date
a new Docker version is available
Docker is up and running
Docker has been shut down
How can you create multiple resources through a single deployment in Kubernetes?
You can only create one resource through one deployment at a time.
Use the three-dash notation to combine multiple files into a single YAML file.
Use kubectl to combine deployments into a single package.
Use an external Python script to package deployment files.
What happens with the command code chmod +x ./kubectl?
It makes the kubectl password protected.
It locks the kubectl.
It turns the kubectl open to edit.
It makes the kubectl executable.
Why does Kubernetes use a liveness probe?
so you can run updates on the healthy containers and check on the amount of traffic
so you will know when a container is actually ready to start accepting traffic
so you can run a periodic check on a container to make sure the container is still healthy
so you can run a manual check on a container to make sure the probes are still healthy
Which two specs can be defined for establishing application health checks?
healthcheckProbe and validationProbe
initialDelaySeconds and timeoutSeconds
readinessProbe and livenessProbe
How are labels added to a running pod?
by relabeling
by labeling
by constructing
by overwriting
What does running the command kubectl get pods --selector dev-lead=karthik,env=staging allow you to do?
add multiple labels and search by one label
add one label and search by multiple labels
subtract and search by multiple labels
add and search by multiple labels
You have many pods with various labels for each. Which command should be used to find the pods associated with your production environment?
get pods --production
get pods --show-labels
get pods --selector env=production
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