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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: VM Deployment and Provisioning | 12% | - Packer - cloud-init - Vagrant - Cloud Management Tools |
| Topic 2: Full Virtualization | 25% | - QEMU - Virtual Machine Disk Image Management - Libvirt Virtual Machine Management - Xen - Virtualization Concepts and Theory |
| Topic 3: Container Virtualization | 25% | - Container Virtualization Concepts - Docker - Container Orchestration Platforms - LXC |
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NEW QUESTION # 72
Which of the following tasks is performed by Vagrant?
Answer: A
Explanation:
Vagrant is a tool designed toautomate the creation and provisioning of development virtual machines using a declarative configuration file called aVagrantfile. According to virtualization documentation, Vagrant simplifies setting up reproducible environments by automatically installing and configuring virtual machines based on this file.
Vagrant does not perform monitoring, reporting, hypervisor functions, or automatic VM migration. It integrates with providers such as VirtualBox, KVM, and VMware but is not itself a hypervisor.
Therefore, the correct answer isA.
NEW QUESTION # 73
Which of the following values would be valid in the FROM statement in aDockerfile?
Answer: A
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 # 74
Which of the following network interface types are valid in an LXD container configuration? (Choose three.)
Answer: A,B,D
Explanation:
Explanation
LXD supports the following network interface types in an LXD container configuration1:
* macvlan: Creates a virtual interface on the host with a unique MAC address and attaches it to an existing physical interface. This allows the container to have direct access to the physical network, but prevents communication with the host and other containers on the same host2.
* bridged: Connects the container to an existing bridge interface on the host. This allows the container to communicate with the host and other containers on the same bridge, as well as the external network if the bridge is connected to a physical interface3.
* physical: Passes an existing physical interface on the host to the container. This allows the container to have exclusive access to the physical network, but removes the interface from the host4.
The other network interface types, ipsec and wifi, are not valid in an LXD container configuration. Ipsec is a protocol for secure communication over IP networks, not a network interface type. Wifi is a wireless technology for connecting devices to a network, not a network interface type. References:
* About networking - Canonical LXD documentation
* Macvlan network - Canonical LXD documentation
* Bridge network - Canonical LXD documentation
* Physical network - Canonical LXD documentation
NEW QUESTION # 75
Which of the following are true regarding the CPU of a QEMU virtual machine? (Choose two.)
Answer: A,B
Explanation:
Explanation
The CPU architecture of a QEMU virtual machine is independent of the host system's architecture. QEMU can emulate many CPU architectures, including x86, ARM, Alpha, and SPARC, regardless of the host system's architecture1. This allows QEMU to run guest operating systems that are not compatible with the host system's hardware. Therefore, option A is correct. QEMU virtual machines support multiple virtual CPUs in order to run SMP systems. QEMU uses the concept of virtual CPUs (vCPUs) to map the virtual machines to physical CPUs. Each vCPU is a thread that runs on a physical CPU core. QEMU allows the user to specify the number of vCPUs and the CPU model for each virtual machine. QEMU can run SMP systems with multiple vCPUs, as well as single-processor systems with one vCPU2. Therefore, option E is also correct. The other options are incorrect because they do not describe the CPU of a QEMU virtual machine. Option B is wrong because QEMU virtual machines can have more than one CPU with more than one core. Option C is wrong because QEMU does not require a dedicated physical CPU core for each virtual machine. QEMU can share the physical CPU cores among multiple virtual machines, depending on the load and the scheduling policy.
Option D is wrong because QEMU does not use the term CPU, but vCPU, to refer to the virtual machines' processors. References:
* QEMU vs VirtualBox: What's the difference? - LinuxConfig.org
* QEMU / KVM CPU model configuration - QEMU documentation
* Introduction - QEMU documentation
* Qemu/KVM Virtual Machines - Proxmox Virtual Environment
NEW QUESTION # 76
What does LXC stand for?
Answer: A
Explanation:
LXCstands forLinux Containers, a lightweight virtualization technology that enables multiple isolated Linux systems (containers) to run on a single Linux host. Virtualization and containerization documentation describes LXC as acontainer-based virtualization solutionthat uses Linux kernel features such as namespaces, control groups (cgroups), and capabilitiesto provide process isolation without requiring a full hypervisor.
Unlike traditional virtual machines, LXC containers share the host kernel, which significantly reduces overhead and improves performance. Each container behaves like an independent Linux system with its own process tree, network interfaces, and filesystem, while still relying on the host kernel for execution.
LXC is often referred to as"system containers", as it allows running full Linux distributions inside containers, unlike application-focused containers such as Docker. It serves as the foundation for higher-level container platforms, includingLXD, which provides enhanced management features and APIs.
The other options are incorrect because they do not align with established Linux container terminology.
Official Linux container documentation consistently defines LXC asLinux Containers, making optionBthe correct answer.
NEW QUESTION # 77
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