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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Full Virtualization | 25% | - Xen
|
| Topic 2: Container Virtualization | 25% | - Container Orchestration Platforms
|
| Topic 3: VM Deployment and Provisioning | 10% | - Vagrant
|
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NEW QUESTION # 114
Which of the following values are valid in thefirmwareattribute of a<os>element in a libvirt domain definition? (Choose two.)
Answer: B,C
NEW QUESTION # 115
Which of the following commands deletes all volumes which are not associated with a container?
Answer: E
Explanation:
Explanation
The command that deletes all volumes which are not associated with a container is docker volume prune. This command removes all unused local volumes, which are those that are not referenced by any containers. By default, it only removes anonymous volumes, which are those that are not given a specific name when they are created. To remove both unused anonymous and named volumes, the --all or -a flag can be added to the command. The command will prompt for confirmation before deleting the volumes, unless the --force or -f flag is used to bypass the prompt. The command will also show the total reclaimed space after deleting the volumes12.
The other commands listed in the question are not valid or do not have the same functionality as docker volume prune. They are either made up, misspelled, or have a different purpose. These commands are:
* docker volume cleanup: This command does not exist in Docker. There is no cleanup subcommand for docker volume.
* docker volume orphan -d: This command does not exist in Docker. There is no orphan subcommand for docker volume, and the -d flag is not a valid option for any docker volume command.
* docker volume vacuum: This command does not exist in Docker. There is no vacuum subcommand for docker volume.
* docker volume garbage-collect: This command does not exist in Docker. There is no garbage-collect subcommand for docker volume.
References:
* docker volume prune | Docker Docs
* How to Remove all Docker Volumes - YallaLabs.
NEW QUESTION # 116
Which of the following statements are true for full virtualization? (Choose TWO correct answers)
Answer: D,E
Explanation:
Full virtualization is a virtualization approach where the hypervisor provides a complete simulation of the underlying hardware, allowingunmodified guest operating systemsto run without awareness of virtualization. Virtualization documentation consistently states that one of the defining characteristics of full virtualization is thatguest operating systems do not need to be modified, making optionCcorrect.
Additionally, modern full virtualization platforms benefit fromhardware-assisted virtualization, such as Intel VT-x and AMD-V CPU extensions. These extensions significantly improve performance by offloading virtualization tasks to the processor, making optionBcorrect.
Option A is incorrect because Linux-based hypervisors like KVM can perform full virtualization entirely within the Linux ecosystem. Option D is false because all virtualization introduces some performance overhead, even if minimal. Option E is incorrect because full virtualization is widely used in production environments, including enterprise data centers and cloud platforms.
Therefore, based on virtualization principles and documentation, the correct answers areB and C.
NEW QUESTION # 117
Which virtualization platforms can Vagrant be used with? (Select all that apply)
Answer: A,B,D
Explanation:
Vagrant supports multipleproviders, allowing it to work with different virtualization and container platforms.
According to official Vagrant documentation, supported providers includeVirtualBox,VMware, andDocker.
VirtualBox is the default and most commonly used provider. VMware is supported through official plugins.
Docker is also supported as a provider, enabling lightweight container-based development environments.
Option D ("Haws") is an apparent typographical error and does not correspond to a valid virtualization platform. While Vagrant can integrate with AWS via community or third-party plugins, the option as written is invalid.
Therefore, the correct answers areA, B, and C.
NEW QUESTION # 118
Which of the following commands lists all differences between the disk images vm1-snap.img and 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 # 119
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