Containerization Basics Quiz

1. What is containerization in the context of software development?

• Containerization is the process of packaging, shipping, and running an application in a loosely isolated environment called a container.
• Containerization refers to the use of physical shipping containers for transporting goods.
• Containerization describes the process of creating backup copies of data on containers.
• Containerization is the method of developing software applications using multiple programming languages.

2. Why is Docker considered essential in containerization?

• Docker enables hardware virtualization for better performance.
• Docker restricts applications to run only on certain operating systems.
• Docker simplifies deployment by using physical machines exclusively.
• Docker provides an efficient way to package and manage applications in containers.

3. What role does a container play in application deployment?

• A container provides an isolated environment for deploying applications.
• A container replicates the application for better performance.
• A container is a server that stores application data.
• A container compiles the source code into executable binaries.

4. What distinguishes an image from a container in Docker?

• An image runs applications while a container is idle.
• A container is a dynamic executable version of an image.
• An image is a read-only template for creating containers.
• A container is a static archive of an image`s files.

5. What command is used to initiate the creation of a Docker image?

• docker push
• docker create
• docker build
• docker start

6. What advantage do developers gain by using Docker containers?

• Enhanced graphic processing capabilities.
• Portable and consistent environments for applications.
• Improved data storage solutions.
• Faster internet connection speeds.

7. How do containers provide improved performance compared to virtual machines?

• Containers require more hardware resources for better performance.
• Containers share the host OS kernel and use fewer resources than virtual machines.
• Containers operate independently of the host OS, which slows down performance.
• Containers run a full guest operating system like virtual machines.

8. What are some critical advantages of implementing container technology?

• Limited application testing and deployment
• Manual deployment and management
• Heavy processing and network reliance
• Lightweight execution and resource isolation

9. What is the function of the Docker daemon within the Docker ecosystem?

• The Docker daemon manages Docker objects and listens for API requests.
• The Docker daemon is responsible for user authentication in Docker.
• The Docker daemon handles the storage of container logs and metrics.
• The Docker daemon creates images and runs network services.

10. In what way does Docker ensure isolation among containers?

• Docker uses namespaces for container isolation.
• Docker uses virtual machines for container isolation.
• Docker uses SSL/TLS for container isolation.
• Docker uses firewalls for container isolation.

11. What information is contained in a Dockerfile?

• A Dockerfile is a command used to run containers directly.
• A Dockerfile is a graphical interface for managing Docker images.
• A Dockerfile is a text file that contains instructions for building a Docker image.
• A Dockerfile is a set of rules for network management in Docker.

12. How can users execute a Docker container effectively?

• You start a Docker container with the `docker push` command.
• You run a Docker container using the `docker run` command.
• You deploy a Docker container via the `docker stop` command.
• You execute a Docker container using the `docker build` command.

13. What occurs when the command `docker run -i -t ubuntu /bin/bash` is executed?

• Docker pulls an Ubuntu image and prints its version number.
• Docker creates a new interactive container running Ubuntu with a bash shell.
• Docker builds a new image from the Ubuntu image and saves it.
• Docker starts a web server using the Ubuntu image and runs it.

14. How does containerization change the deployment process compared to virtual machines?

• Containers require a full operating system for each deployed instance.
• Virtual machines use the Docker API to manage their resources.
• Virtual machines run on separate hardware, creating multiple physical servers.
• Containers run natively on the host OS and share the kernel.

15. What is the primary way to handle Docker container lifecycles?

• Executing Java applications in a virtual machine
• Using traditional coding practices with text files
• Using Docker commands like `docker run`, `docker stop`, `docker rm`, and `docker ps`
• Storing files directly on a hard drive without containers

16. List the types of objects managed by Docker.

• Jobs
• Files
• Images
• Tasks

17. How are Docker containers connected to networks?

• You can connect a container to a network by using the `docker attach` command.
• You can connect a container to the host machine using the `docker connect` command.
• You can connect a container to other containers using the `docker link` command.
• You can connect a container to one or more networks using the `docker network` command.

18. What does persistent storage mean in the context of Docker?

• Persistent storage is the amount of RAM allocated to the container.
• Persistent storage means deleting data when a container is stopped.
• Persistent storage is temporary storage used for caching.
• Persistent storage refers to data stored outside a container`s filesystem.

19. How can developers create a new Docker image from an existing container?

• Use the `docker commit` command.
• Launch the `docker push` command.
• Execute the `docker build` command.
• Run the `docker create` command.

20. What is the function of the Docker client within the Docker architecture?

• The Docker client is responsible for storing persistent data used by containers on disk.
• The Docker client runs a full operating system to launch containers efficiently.
• The Docker client provides a user interface for configuring network security in containers.
• The Docker client communicates with the Docker daemon to manage Docker objects, such as images, containers, networks, and volumes.

21. What does Kubernetes do for containerized applications?

• Generates images from code
• Compiles applications into binary files
• Analyzes network traffic for security
• Orchestrates the deployment and management of containers

22. Identify the main elements found in a Kubernetes cluster.

• Virtual machine
• Load balancer
• Application server
• Control plane

23. How is a pod defined and used in Kubernetes?

• A pod is a command-line tool used to manage Kubernetes clusters.
• A pod is a type of virtual machine that runs on Kubernetes.
• A pod is a single container that runs independently without sharing resources.
• A pod is a logical unit for managing applications in Kubernetes, containing one or more containers with shared resources.

24. What strategies does Kubernetes use for scaling applications?

• Service discovery adjustments
• Manual replica management
• Vertical node scaling
• Horizontal pod autoscaling

25. What do deployments in Kubernetes facilitate for application management?

• Simplified application updates
• Speed of container downloads
• Enhanced user interface
• Improved operating system security

26. How do pods and deployments differ in Kubernetes?

• A pod is a type of database management system.
• A pod is a single unit of deployment that can contain multiple containers.
• A pod is a virtual machine running in the cloud.
• A pod is a physical server that hosts applications.

27. What are the commands used to handle rollout and rollback in Kubernetes?

• kubectl rollout
• kubectl replace
• kubectl restart
• kubectl update

28. What role does etcd play in a Kubernetes environment?

• Etcd provides networking capabilities in Kubernetes.
• Etcd stores configuration data for Kubernetes.
• Etcd monitors container performance metrics.
• Etcd manages container resources in Docker.

29. What methods are used to configure networking within Kubernetes?

• Static routing
• VLAN assignments
• Firewall rules
• Network policies

30. What responsibilities does the control plane have in managing Kubernetes?

• The control plane manages external storage systems in Kubernetes.
• The control plane manages the lifecycle of pods and services in Kubernetes.
• The control plane runs all containerized applications in Kubernetes.
• The control plane is responsible for user authentication in Kubernetes.