LPI 305-300 LATEST BRAINDUMPS | 305-300 VALID TEST PATTERN

Lpi 305-300 Latest Braindumps | 305-300 Valid Test Pattern

Lpi 305-300 Latest Braindumps | 305-300 Valid Test Pattern

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Lpi LPIC-3 Exam 305: Virtualization and Containerization Sample Questions (Q48-Q53):

NEW QUESTION # 48
Which of the following values would be valid in the FROM statement in aDockerfile?

  • A. ubuntu:focal
  • B. docker://ubuntu: focal
  • C. http://docker.example.com/images/ubuntu-focal.iso
  • D. file:/tmp/ubuntu/Dockerfile
  • E. registry:ubuntu:focal

Answer: A

Explanation:
Explanation
The FROM statement in a Dockerfile specifies the base image from which the subsequent instructions are executed1. The value of the FROM statement can be either an image name, an image name with a tag, or an image ID1. The image name can be either a repository name or a repository name with a registry prefix2. For example, ubuntu is a repository name, and docker.io/ubuntu is a repository name with a registry prefix2. The tag is an optional identifier that can be used to specify a particular version or variant of an image1. For example, ubuntu:focal refers to the image with the focal tag in the ubuntu repository2. The image ID is a unique identifier that is automatically generated when an image is built or pulled1. For example, sha256:9b0dafaadb1cd1d14e4db51bd0f4c0d56b6b551b2982b2b7c637ca143ad605d2 is an image ID3.
Therefore, the only valid value in the FROM statement among the given options is ubuntu:focal, which is an image name with a tag. The other options are invalid because:
* docker://ubuntu:focal is not a valid image name format. The docker:// prefix is used to specify a transport protocol, not a registry prefix4.
* registry:ubuntu:focal is not a valid image name format. The registry prefix should be a valid hostname or IP address, not a generic term2.
* file:/tmp/ubuntu/Dockerfile is not a valid image name format. The file: prefix is used to specify a local file path, not an image name5.
* http://docker.example.com/images/ubuntu-focal.iso
is not a valid image name format.
The
http:// prefix is used to specify a web URL, not an image name
5.
References:
* 1: Dockerfile reference | Docker Docs
* 2: docker - Using FROM statement in dockerfile - Stack Overflow
* 3: How to get the image id from a docker image - Stack Overflow
* 4: skopeo - Docker Registry v2 API tool - Linux Man Pages (1)
* 5: How to build a Docker image from a local Dockerfile? - Stack Overflow


NEW QUESTION # 49
Which directory is used bycloud-initto store status information and configuration information retrieved from external sources?

  • A. /var/lib/cloud/
  • B. /opt/cloud/var/
  • C. /tmp/.cloud/
  • D. /etc/cloud-init/cache/
  • E. /proc/sys/cloud/

Answer: A


NEW QUESTION # 50
Which of the following commands lists all differences between the disk images vm1-snap.img and vm1.img?

  • A. virt-cmp -a vm1-snap.img -A vm1.img
  • B. virt-cp-in -a vm1-snap.img -A vm1.img
  • C. virt-delta -a vm1-snap.img -A vm1.img
  • D. virt-history -a vm1-snap.img -A vm1.img
  • E. virt-diff -a vm1-snap.img -A vm1.img

Answer: E

Explanation:
Explanation
The virt-diff command-line tool can be used to list the differences between files in two virtual machines or disk images. The output shows the changes to a virtual machine's disk images after it has been running. The command can also be used to show the difference between overlays1. To specify two guests, you have to use the -a or -d option for the first guest, and the -A or -D option for the second guest. For example: virt-diff -a old.img -A new.img1. Therefore, the correct command to list all differences between the disk images vm1-snap.img and vm1.img is: virt-diff -a vm1-snap.img -A vm1.img. The other commands are not related to finding differences between disk images. virt-delta is a tool to create delta disks from two disk images2. virt-cp-in is a tool to copy files and directories into a virtual machine disk image3. virt-cmp is a tool to compare two files or directories in a virtual machine disk image4. virt-history is a tool to show the history of a virtual machine disk image5. References:
* 21.13. virt-diff: Listing the Differences between Virtual Machine Files ...
* 21.14. virt-delta: Creating Delta Disks from Two Disk Images ...
* 21.6. virt-cp-in: Copying Files and Directories into a Virtual Machine Disk Image ...
* 21.7. virt-cmp: Comparing Two Files or Directories in a Virtual Machine Disk Image ...
* 21.8. virt-history: Showing the History of a Virtual Machine Disk Image ...


NEW QUESTION # 51
What kind of virtualization is implemented by LXC?

  • A. CPU emulation
  • B. Paravirtualization
  • C. System containers
  • D. Hardware containers
  • E. Application containers

Answer: C


NEW QUESTION # 52
Which of the following commands moves the libvirt domainweb1from the current host system to the host systemhost2?

  • A. virsh cp .:web1 host2:web1
  • B. virsh patch web1 .Domain.Node=host2
  • C. virsh node-update host1=-dom:web1 host2=+dom:web1
  • D. virsh migrate web1 qemu+ssh://host2/system
  • E. virsh pool-add host2 web1

Answer: D


NEW QUESTION # 53
......

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