Practice Test Replication Controllers and Replicasets

A ReplicaSet is one of the Kubernetes controllers?

True
False

What is a Label in Kubernetes?

A way to expose traffic
A type of Deployment
A way to group related things using key/value pairs
None of the above

What is the command to delete a replication controller nginx?

kubectl get rc nginx
kubectl remove rc nginx
kubectl rm rc nginx
kubectl delete rc nginx

What is the flag that you use along with the kubectl create command to deploy multiple instances of an application in Kubernetes?

--image
--label
--replicas
--scale

Where do you configure the selector labels in the deployment YAML file?

metadata.selector
spec.selector
spec.template.selector
spec.template.metadata.selector

How do you add labels to a pod in a pod definition YAML file?

labels
spec.labels
spec.containers.labels
metadata.labels

What are the 4 top level fields of a Kubernetes definition file for ConfigMap?

apiVersion
templates
metadata
data
kind
spec
containers

What is the command to delete the pod busybox?

kubectl pod delete busybox
kubectl delete busybox
kubectl delete pod/busybox
kubectl pod busybox --delete

What is the command to deploy a pod with the name jenkins and image jenkins?

kubectl deploy jenkins --image jenkins
kubectl run jenkins --image jenkins
kubectl start -it jenkins sh
kubelet run jenkins --image jenkins

Which of the following are the container runtimes that Kubernetes supports?

Docker
Containerd
CRI-O
LXC

What is a component of the Kubernetes control plane that allows external users or services to manage the Kubernetes cluster?

Kubernetes Scheduler
ETCDCTL
Kube API Server
Kube Proxy

Which of the following are components deployed only on a Master Node in a Kubernetes cluster?

Kube Scheduler
Kube Controller Manager
Kube Api-server
Kubelet
Kube-Proxy

ETCD by default listens on port 2780.

True
False

Which statement best describes the Worker Node component?

kubelet and container runtime are the worker node components
kube-proxy is one of the worker node component
kube-scheduler is one of the worker node component
All of the above

Which of the below are the container orchestration tools?

Kubernetes
Docker Swarm
Google Compute Engine
Apache Mesos
ETCD

What is the command to list all the pods that are in a netpol namespace? Select all the answers that apply.

kubectl list pods -n netpol
kubectl get pods
kubectl list pods -n netpol
kubectl get pods -n netpol

Which statement best describes deployment in Kubernetes? Select all the answers that apply.

Deployments create PODs and not ReplicaSets.
Deployments create ReplicaSets that create PODs.
Deployments support rolling updates and roll backs of applications.
Deployments support rolling updates but not roll backs.

Where do you configure the pod images in the deployment YAML file?

metadata.image
spec.containers.image
spec.template.spec.containers.image
spec.template.containers.image

What kubectl command can be used to perform a Deployment update?

kubectl set image
kubectl rollout update
kubectl rolling-update
kubectl update

Which of the following are the deployment strategy types in Kubernetes?

RollingUpdate
BlueGreen
Canary
Recreate

Each container inside a POD does not get its own IP address assigned. All containers inside a POD share a single IP address.

True
False

Which among the following statements are true without any change made to the default behaviour of network policies in the namespace?

As soon as a network policy is associated with a POD traffic between all PODs in the namespace is denied
As soon as a network policy is associated with a POD all ingress and egress traffic to that POD are denied except those allowed by the network policy
As soon as a network policy is associated with a POD all ingress and egress traffic to that POD are allowed except for the the ones blocked by the network policy

Which of the following statements are correct about ClusterIP?

ClusterIP exposes a service on the same port as that of the exposed port on containers in the PODs.
ClusterIP exposes a service internally within the hosts only.
ClusterIP exposes a service to make it externally accessible on a port on the nodes.
None of the Above

The command and arguments that you define in the Kubernetes definition file override the default command and arguments configured in the container image.

True
False

How do you set environment variables in a pod definition file?

Using environment section
Using env section
Using env_var section
Using variables section

Which command is used to make some changes into the already existing PersistentVolumeClaim mysql-pvc?

kubectl describe pvc mysql-pvc
kubectl get pvc mysql-pvc
kubectl pvc edit mysql-pvc
kubectl edit persistentvolumeclaim mysql-pvc

What is the command to display details of the secret user-list?

kubectl get secret user-list
kubectl describe secret user-list
kubectl list secret user-list
kubectl get secret user-list --details

What is the command to list configmaps? Select all the answers that apply.

kubectl get pods
kubectl get cm
kubectl get configmap
kubectl get maps

You can pass in the --from-file argument multiple times to create a ConfigMap from multiple data sources.

True
False

Which statement best describes the readiness probe?

The kubelet uses readiness probes to know when a container is ready to start accepting traffic.
The kubelet uses readiness probes to know when to restart a container
The Readiness probes run on the container during its whole lifecycle.
All of the above

The kubelet uses liveness probes to know when a container is ready to start accepting traffic.

True
False

Liveness probes let Kubernetes know if your app is alive or stuck/dead.

True
False

Which of the following statements best describes Kubernetes network policies?

Consider using Kubernetes NetworkPolicies if you want to control traffic flow at the IP address or port level.
NetworkPolicies are an application-centric construct which allow you to specify how a pod is allowed to communicate with various network "entities" over the network
Network Policies are implemented by the Kubernetes NetworkPolicy Controller
All of the above

Which service type is used to expose applications outside the Kubernetes cluster?

NodePort
ClusterIP
ExternalName
ElasticLoadBalancer

If .spec.strategy.type is set to RollingUpdate, then all new PODs are created first and then all existing pods are killed at once.

True
False

Which kubectl command is used to display more details of the storage classes?

kubectl list sc
kubectl info sc
<code>kubectl describe storageclass</code>
kubectl list storageclass

Practice Test Replication Controllers and Replicasets

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