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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Container Virtualization | 25% | - Container Orchestration Platforms - LXC - Container Virtualization Concepts - Docker |
| Topic 2: VM Deployment and Provisioning | 12% | - cloud-init - Packer - Cloud Management Tools - Vagrant |
| Topic 3: Full Virtualization | 25% | - Xen - Virtualization Concepts and Theory - Libvirt Virtual Machine Management - Virtual Machine Disk Image Management - QEMU |
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NEW QUESTION # 63
Which of the following components are essential in Docker architecture? (Select all that apply)
Answer: A,C,D
Explanation:
Docker architecture consists of several core components that enable container creation and management.
According to Docker documentation, theDocker Client,Docker Daemon, andDocker Registryare essential components.
TheDocker Clientis the user-facing command-line interface that sends commands to the daemon. TheDocker Daemon (dockerd)performs the heavy lifting, such as building images, running containers, and managing networks and storage. TheDocker Registrystores container images, enabling image distribution and reuse.
Docker Composeis an optional orchestration tool used to define and run multi-container applications, but it is not an essential architectural component.
Therefore, the correct answers areA, C, and D.
NEW QUESTION # 64
Which of the following resources can be limited by libvirt for a KVM domain? (Choose two.)
Answer: D,E
Explanation:
Libvirt is a toolkit that provides a common API for managing different virtualization technologies, such as KVM, Xen, LXC, and others. Libvirt allows users to configure and control various aspects of a virtual machine (also called a domain), such as its CPU, memory, disk, network, and other resources. Among the resources that can be limited by libvirt for a KVM domain are:
* Amount of CPU time: Libvirt allows users to specify the number of virtual CPUs (vCPUs) that a domain can use, as well as the CPU mode, model, topology, and tuning parameters. Users can also set the CPU shares, quota, and period to control the relative or absolute amount of CPU time that a domain can consume. Additionally, users can pin vCPUs to physical CPUs or NUMA nodes to improve performance and isolation. These settings can be configured in the domain XML file under the <cpu> and <cputune> elements12.
* Size of available memory: Libvirt allows users to specify the amount of memory that a domain can use, as well as the memory backing, tuning, and NUMA node parameters. Users can also set the memory hard and soft limits, swap hard limit, and minimum guarantee to control the memory allocation and reclaim policies for a domain. These settings can be configured in the domain XML file under the <memory>, <memoryBacking>, and <memtune> elements13.
The other resources listed in the question are not directly limited by libvirt for a KVM domain. File systems allowed in the domain are determined by the disk and filesystem devices that are attached to the domain, which can be configured in the domain XML file under the <disk> and <filesystem> elements14. Number of running processes and number of available files are determined by the operating system and the file system of the domain, which are not controlled by libvirt.
:
libvirt: Domain XML format
CPU Allocation
Memory Allocation
Hard drives, floppy disks, CDROMs
NEW QUESTION # 65
Which of the following statements is true regarding the following output ofxl list:
Answer: A
NEW QUESTION # 66
FILL BLANK
What LXC command lists containers sorted by their CPU, block I/O or memory consumption? (Specify ONLY the command without any path or parameters.)
Answer:
Explanation:
lxc-top
NEW QUESTION # 67
When using Packer to create machine images, what are some common sources for base images? (Select all that apply)
Answer: C,D
Explanation:
Packer is an image automation tool used to create identical machine images for multiple platforms from a single configuration. According to virtualization and containerization documentation, Packer typically uses trusted and standardized base imagesas the starting point for image creation. The most common sources includeofficial operating system imagesprovided by vendors such as Red Hat, Ubuntu, or cloud service providers, andcustom images created internally by an organization.
Using official images ensures that the base system is secure, properly maintained, and compliant with vendor standards. Organizations often build custom base images to enforce internal security policies, hardening standards, and preinstalled software, which Packer then extends into environment-specific images.
Physical servers are not considered common or practical base sources for Packer, as Packer operates on machine image artifacts rather than cloning live hardware systems. Images from untrusted sources are explicitly discouraged in virtualization documentation due to security and compliance risks.
Therefore, documentation clearly supportscustom organizational imagesandofficial operating system imagesas the correct and recommended base sources for Packer image creation.
NEW QUESTION # 68
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