General Docker MCQs

1. The 'rmi' command in docker is used to?

2. Choose the correct statement

3. Which statement correctly describes a docker image.

4. Correct statement to describe the Docker repository

5. Signed manifests include an image manifest and a list of signatures generated by libtrust. A signature consists of the following fields?

6. In what format are Docker images identified?

7. The command to list all currently available images is?

8. Which is NOT true?

9. Which is NOT a valid docker command for images?

10. Best describes the possible security implications of public docker images

11. What is the command used to convert a container into an image?

12. What format of compose files are supported by docker?

13. What does the docker management command dockerd do?

14. How do links and scaling work together in docker compose?

15. Can an individual Docker container, for example a web server, that exposes (listens on) a port be started using systemd's socket activation feature?

16. The docker compose sub-command 'up' is used to?

17. Which command is used to show all running containers?

18. For the following 'docker-compose.yml' fragement scala: build: ./scala expose: - 40000-50000 ports: - 9000:9000 - 4040:4040 links: - mongo volumes: - ../../:/root/cardio - ~/.ivy2:/root/.ivy2 - ~/.sbt:/root/.sbt stdin_open: true Choose the most correct statement to describe the ' volumes' command as it appears in the code.

19. Scheduling strategies are how Swarm decides which nodes on a cluster to start containers on. Swarm supports the following strategies?

20. The command for running a docker container is

21. Docker is

22. Best describes Docker as a technology innovation.

23. Containers on the network ___ DNS mappings for the service via gossip so any container on the network can access the service via its service name?

24. Docker Universal Control Plane (UCP) is the enterprise-grade cluster management solution from?

25. The 'exec' command in docker is used to

26. The container configuration filters are?

27. Custom, cross-host container networks are?

28. Docker can be integrated into various infrastructure tools, including?

29. Which is true?

30. How Docker's Containers are different to Virtual Machines?

31. When using 'systemd' your docker containers start but get shut down instantly. Choose the best explanation for why this may be happening.

32. How will a server running multiple Docker containers handle the TCP limitation?

33. What are the two major Docker components?

34. The Docker client and daemon can communicate via?

35. Docker diff command has 3 events listed in it. They are

36. The default registry is accessible using the command:

37. In docker, a union file system is the union of ?

38. Docker is an open platform for developers and __ to build, ship, and run distributed application?

39. Correct statement for Docker Swarm

40. Which statement correctly describes a ‘docker.sock’.

41. Can data volume containers be used/mounted in containers residing on other hosts within a docker swarm?

42. The default Engine and Swarm ports for TLS are?

43. Multiple containers share the same kernel, but each container can be constrained to only use a defined amount of resources such as _____ , memory and I/O?

44. Best description of the difference between a Docker container and a Linux process.

45. Docker containers can be

46. For the 'docker-compose.yml' fragment below scala: build: ./scala expose: - 40000-50000 ports: - 9000:9000 - 4040:4040 links: - mongo volumes: - ../../:/root/cardio - ~/.ivy2:/root/.ivy2 - ~/.sbt:/root/.sbt stdin_open: true mongo: image: mongo volumes_from: - data ports: - "27017:27017" Choose the most correct statement to describe the 'links' block

47. Swarm agents are responsible for hosting containers. They are regular docker daemons and you can communicate with them using the ___?

48. Which is True? In Docker, when a container is exited

49. What does the docker swarm command 'swarm join' do?

50. Which statement True of Docker Machine?

51. ___ is a cloud service for sharing applications and automating workflows.

52. Using the following command to create a new swarm?

53. At a high-level, which of the following steps will you use to integrate UCP with DRT?

54. Which command is used to list services in a swarm?

55. The cluster management and orchestration features embedded in the Docker Engine are built using?

56. Garbage collection can be run using the following command?

57. The legacy link provided following major functionalities to the default bridge network?

58. How can you run services in the background with docker compose?

59. The dockerd options that support the overlay network are?

60. Correct statement to describe Docker 'cgroups'.

61. Difference between the COPY and ADD commands in a Dockerfile.

62. An external CA is a trusted 3rd party company that provides a means of _____ , and otherwise managing certificates?

63. ___ is a portable, lightweight runtime and packaging tool.

64. The is an alpha-numeric string, dots, hyphens, and underscores making up which of the following? Check all that apply.

65. Which is true? Check all that apply.

66. What are the node filters?

67. Correct statement to describe Docker container namespaces.

68. Which command is True for applications to run in containers?

69. Describe the CMD command for Dockerfiles.

70. Correct statement for Webhooks in the Docker Workflow.

71. You can use the Docker repository and its __ to create a Docker image, run a Docker container, and develop code in the container?

72. Correct statement to describe the ENTRYPOINT argument In Dockerfiles.

73. How can you create a hashtable with the settings for your container?

74. For the following 'docker-compose.yml' fragment scala: build: ./scala expose: - 40000-50000 ports: - 9000:9000 - 4040:4040 links: - mongo volumes: - ../../:/root/cardio - ~/.ivy2:/root/.ivy2 - ~/.sbt:/root/.sbt stdin_open: true Choose the correct statement to describe the 'expose' command as used in the code.

75. Correct statement to describe Docker.

76. Correct statement to describe the Docker File entry below. FROM ubuntu

77. Choose the correct statement for Automated Builds in the Docker Workflow.

78. Which command is used to associate an image with a repository (or multiple repositories) at build time?

79. The Docker zfs storage driver makes extensive use of the following ZFS datasets:

80. Correct statement to describe the Docker Hub in the Docker Workflow.

81. Correct statement to describe the contents directory found under the filesystem location shown below. /var/lib/docker

82. How can you configure the LDAP integration?

83. Which statement is correct about Service discovery?

84. Which statement is True of Docker swarm?

85. Swarm supports the following backend discovery services?

86. A fast way to remove a dangling image is to use the following command:

87. How wll manager nodes handle cluster management tasks? (choose all that apply)

88. Swarm currently supports following values?

89. Correct statement for Docker Compose.