Introduction to Containers w/ Docker, Kubernetes & OpenShift Quiz Answers

Introduction to Containers w/ Docker, Kubernetes & OpenShift Week 01 Quiz Answers

Quiz : Module 1 – Graded Quiz

Q1. Which of the following are benefits of containers?

• Containers provide a standardized way to package and ship software.
• Each container is fully isolated and therefore secure.
• Each container runs its own operating system (OS).
• Like virtual machines (VMs), containers virtualize your infrastructure.

Q2. What is an image?

• A YAML file with key/value pairs specifying the attributes of a container.
• A read-only file that contains the source code, libraries, and dependencies that are needed to run an application.
• A text file that contains the commands and settings that will run a container and the apps running in that container.
• An isolated process running on a local or remote host with its own file system and networking.

Q3. In this sample Dockerfile, what does the FROM instruction do?

FROM ubuntu:18.04

COPY . /app

RUN make /app

CMD python /app/app.py

• It defines the virtualized host operating system on which the container will run.
• It defines the base image, which in this case is Ubuntu version 18.04.
• It defines the minimum version of the operating system for the docker build command to use.
• It defines the operating system on which the docker build command must be run.

Q4. What does the docker build command do?

• It creates a Dockerfile.
• It uses an image to create a container.
• It creates a Docker app.
• It uses a Dockerfile to create an image.

Q5. You can use the Docker COPY instruction to copy files from your local machine to an image.

• True
• False

Q6. What does the Docker CLI build command do?

• It builds a Dockerfile.
• It builds a new container.
• It builds a microservice that will run in an image.
• It builds a new cluster.
• It builds an image from a Dockerfile.

Q7. Containers include a guest operating system in every instance.

• True
• False

Q8. In this sample docker build command, what does the -t option do?

docker build -t my-app:v1 .

• It tags the current working directory as the target location for the image being built.
• It indicates that the version “v1” of “my-app” should be used when building the image.
• It indicates that the files used to build the image are located in the current working directory.
• It gives the image the name “my-app” and the tag “v1”.

Q9. You use the docker push command to distribute an image to a registry.

• True
• False

Introduction to Containers w/ Docker, Kubernetes & OpenShift Week 02 Quiz Answers

Quiz : Module 2 – Graded Quiz

Q1. Which of the following four statements describes what Kubernetes is? Select all that apply.

• Open source software
• Container orchestration platform
• A registry for storing images
• Widely available
• A tool that facilitates declarative management

Q2. Which of the following components is part of the Kubernetes control plane?

• The Kubernetes network proxy
• The kubelet
• etcd
• The worker nodes

Q3. Which of the following two are Kubernetes objects? Select all that apply.

• Clusters
• Kubelets
• Kubernetes scheduler
• Namespaces
• ConfigMaps

Q4. Which Kubernetes object represents a single instance of processes running in a container?

• Pod
• Cluster
• Kubelet
• Deployment
• ReplicaSet

Q5. In this sample kubectl command, what does create do?

kubectl create -f nginx.yaml

• It creates a new cluster using the details in the nginx.yaml file.
• It creates a configuration file for an nginx web server.
• It creates a YAML file named nginx.yaml.
• It creates an object using the details in the nginx.yaml file.

Q6. Which of the following statements describes what Kubernetes is? 

• A container orchestration platform
• A solution for sharing and storing images
• An all-inclusive platform as a service (PaaS)
• A service for building source code
• A continuous delivery pipeline

Q7. Which of the following two are container runtimes? Select all that apply.

• CRI-O
• DRunner
• Kubelet
• Rocket Ship
• Docker

Q8. Which of the following Kubernetes objects can you use to segregate a cluster by team or project?

• Kubernetes controllers
• Volumes
• ConfigMaps
• Namespaces

Q9. Which Kubernetes object provides updates to Pods and ReplicaSets?

• ConfigMap
• Secret
• Deployment
• Patch

Q10. In this sample kubectl command, what does create do?

kubectl create -f pod.json

• It creates a file that contains the configuration for a Kubernetes Pod.
• It creates a new cluster using the details in the pod.json file.
• It creates a JSON file named pod.json.
• It creates an object using the details in the pod.json file.

Introduction to Containers w/ Docker, Kubernetes & OpenShift Week 03 Quiz Answers

Quiz : Module 3 – Graded Quiz

Q1. Which of the following statements describes what a ReplicaSet does? Select the four that apply.

• Maintains a stable set of Pods in a cluster, spinning up or deleting pods as needed
• Provides configuration details to Deployments
• Rolls out app changes in an automated and controlled manner
• Autoscales an application
• Replicates a Deployment

Q2. Which of the following Kubernetes objects are used to run applications? Select the four that apply.

• ReplicaSets
• Service bindings
• Secrets
• ConfigMaps
• ibmcloud CLI

Q3. In this sample kubectl command, what does get deployments tell us? Select the four that apply.

» kubectl get deployments

NAME READY UP-TO-DATE AVAILABLE AGE Nginx-deploy 1/3 1 1 3s

• How many replicas of the application are available.
• How long the application has been running.
• How many replicas of the application are ready.
• The number of replicas that have been updated to the desired state.
• The Kubernetes namespace in which the Deployments live.

Q4. Which of the following Kubernetes objects is used to store and manage sensitive information?

• ReplicaSets
• Service bindings
• Secrets
• ConfigMaps

Q5. Which of the following can be used to create ConfigMaps? Select the three that apply.

• Service bindings
• A YAML configuration file
• A file with key-value pairs
• Horizontal Pod Autoscaler
• The kubectl configmap command

Q6. How are ReplicaSets often created?

• By adding a ReplicaSet: on flag to the deployment’s configuration file.
• Using the kubectl create replicaset command.
• By adding a ReplicaSet: on flag to the Dockerfile used to build the container image.
• One is automatically created for you when you create a Deployment.

Q7. Which of the following Kubernetes objects are used to run applications? Select the three that apply.

• Plugins
• ConfigMaps
• ResourceSets
• Deployments
• Service bindings

Q8. Which of the following are used to provide ConfigMaps to Pods and Deployments? Select the two that apply.

• Service bindings
• Kubernetes schedulers
• String literals
• Container runtimes
• YAML configuration files

Q9. What Kubernetes capabilities enable an application to increase the number of Pods based on traffic? Select the two that apply.

• Service binding
• kubectl scale command
• kubectl autoscale command
• Horizontal Pod Autoscaler 
• Kubernetes traffic router

Q10. What does the following command do?

kubectl get secrets –namespace=default

• Retrieves the IBM Cloud IAM API key for your Kubernetes cluster
• Retrieves the binding.password values for the services bound to your Kubernetes cluster
• Retrieves all the Secrets in your Kubernetes cluster
• Retrieves the secrets in the “default” namespace

Introduction to Containers w/ Docker, Kubernetes & OpenShift Week 04 Quiz Answers

Quiz : Module 4 – Graded Quiz

Q1. Which of the following most accurately describes the relationship between Red Hat OpenShift and Kubernetes?

• OpenShift packages Kubernetes with additional tooling to make developers and administrators more successful.
• OpenShift is a tool in the Kubernetes that ecosystem that can be used in conjunction with Kubernetes to deploy cloud-native applications.
• OpenShift can be deployed on a Kubernetes cluster to provide additional tooling such as logging, monitoring, and CI/CD.
• OpenShift plugs into Kubernetes through custom resource definitions to provide build and other capabilities.

Q2. Which of the following are Red Hat OpenShift build triggers? Select the three that apply.

• Docker build
• Configuration change
• Source-to-image
• Webhook
• Image change

Q3. Which of the following are possible with Istio service mesh? Select the three that apply.

• Setting policies that stipulate which services can talk to each other
• Encrypting traffic between services
• Routing traffic to two versions of a microservice
• Creating protocols for service to service communication
• Decouple applications into smaller, loosely coupled microservices

Q4. Which of the following are types of operators available in OperatorHub? Select the three that apply. 1

• CRD
• Community
• Custom controller
• Red Hat
• Certified

Q5. Image streams can point to images in which of the following locations. Select the four that apply.

• The OpenShift internal registry
• Public external registries
• Private external registries
• Other image streams
• A Kubernetes cluster

Q6. What is the Istio service mesh NOT used for? Select all that apply.

• Observe and monitor services
• Secure communication between services
• Control the flow of traffic between services
• Encrypt Kubernetes secrets

Q7. Kubernetes is the sole project inhosted by the CNCF.

• True
• False

Q8. OpenShift can be run in which of the following environments? Select the four that apply.

• Public cloud
• Hybrid cloud
• Private cloud
• On premise
• Only A and C

Q9. What is the open source upstream version of OpenShift called?

• Kubernetes open source
• CRD
• Istio
• OKD
• Red Hat Enterprise Linux CoreOS

Q10. Which of the following build strategies injects application source code into builder images without having to write a Dockerfile?

• Source-to-image
• Docker
• Image stream
• Webhook
• Custom build

Q11. Image streams contain complete image data.

• True
• False

Q11. Do containers have to be on a specific operating system or platform?

• Yes, containers only work on Linux-based operating systems and platforms.
• No, containers work on many types of operating systems and platforms.
• Yes, containers only work on Windows-based operating systems and platforms.
• No, containers don’t run on operating systems or platforms.
• Containers can be used across multiple types of operating systems and platforms.

Q12. How are digital containers like shipping containers?

• Both digital and shipping containers have to travel internationally.
• Digital containers must be welded to computer motherboards, just like shipping containers must be welded.
• Container size and specs are standardized, which makes them easier to move around.
• Digital containers are not like shipping containers.
• Digital containers make software portable so applications can run on multiple platforms.

Q13. What applications are a good fit for Docker?

• Applications that need a lot of security
• Applications that require flexible scaling and portability
• Applications with rich GUI features
• Applications with high performance requirements
• Docker became popular with developers because of its simple architecture, high scalability, and easy portability.

Q14. What are three parts of Docker’s underlying technology.

• Linux kernel features
• Linux kernel features are a part of Docker’s underlying technology.
• Namespaces
• Namespaces are a part of Docker’s underlying technology.
• GitHub
• The Go programming language
• The Go programming language is a part of Docker’s underlying technology.

Q15. What Docker features create a container image?

• The build command and a Dockerfile
• The image command and a Dockerfile
• The copy command and an existing image
• The run command and a Dockerfile
• The build command is used with a Dockerfile to build a container image.

Q16. What are the steps used to create and run containers?

• Create a Dockerfile and use it with the pull command to create a running container.
• Create a container image, use it to create a Dockerfile, and then use the Dockerfile to create a running container.
• Create a Dockerfile, use it to create a container image, and then use the container image to create a running container.
• Input the container image name and tag.
• The proper sequence of steps to create and run containers is to create a Dockerfile, use it to create a container image, and then use the container image to create a running container.

Q17. What is the function of the Docker ‘run’ command?

• Creates a container from an image
• Stores images in a configured registry
• Lists all images, repositories, tags, and sizes
• Retrieves images from a configured registry
• Please review the Building and Running Containers video.

Q18. What is a Docker container?

• A method of isolating communication
• A persistent set of data that can be transferred
• A read-only template
• A runnable instance of an image
• A Docker container is defined as a runnable instance of an image.

Q19. What are volumes and bind mounts used for in Docker?

• Isolating communication
• Erasing data
• Persisting data
• Connecting to external storage platforms
• Volumes and bind mounts are used to persist data in Docker.

Q20. What does the Docker client-server architecture provide?

• An application environment
• Cloud storage
• Code checking
• A communication channel
• The Docker client-server architecture provides a complete application environment.

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