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Lpi 305-300 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Full Virtualization25%- Libvirt Virtual Machine Management
  • 1. Snapshots and migrations
  • 2. virt-install options
  • 3. virsh command usage (list, define, undefine, start, stop)
  • 4. Manage virtualization hosts and VMs (libvirt domains) using libvirt and related tools
  • 5. Virtual networking and storage management
  • 6. Domain XML configuration
- Virtual Machine Disk Image Management
  • 1. Backing file chains and snapshot handling
  • 2. qcow2 vs raw formats
  • 3. qemu-img info, convert, resize operations
  • 4. Accessing data stored within an image
  • 5. Manage virtual machines disk images
  • 6. Converting disk images between formats and hypervisors
- Xen
  • 1. Xen version 4.x
  • 2. Domain configuration
  • 3. Xen management tools
  • 4. Install, configure, maintain, migrate and troubleshoot Xen installations
- Virtualization Concepts and Theory
  • 1. General concepts, theory and terminology of virtualization
  • 2. Xen, QEMU and libvirt terminology
  • 3. Device emulation vs paravirtual drivers
  • 4. Hypervisor architectures
  • 5. Hardware virtualization extensions (VT-x/AMD-V)
- QEMU
  • 1. QEMU networking
  • 2. QEMU command line tools
  • 3. QEMU machine types
  • 4. Install, configure, maintain, migrate and troubleshoot QEMU installations
Topic 2: Container Virtualization25%- Container Virtualization Concepts
  • 1. Troubleshooting container components using standard Linux tools
  • 2. Linux capabilities
  • 3. Linux kernel components: namespaces and cgroups
  • 4. Differences between system containers and application containers
  • 5. Concept of container virtualization
- LXC
  • 1. Use system containers using LXC and LXD
  • 2. LXC/LXD profiles and images
  • 3. LXC version 3.0 or higher
  • 4. Resource limits configuration
- Docker
  • 1. How Docker interacts with the node's Linux system
  • 2. Manage Docker nodes and Docker containers
  • 3. Deploying applications with Docker
  • 4. Docker architecture
  • 5. Building images with Dockerfiles
  • 6. Managing volumes and networks
- Container Orchestration Platforms
  • 1. Docker Swarm key concepts
  • 2. Docker Compose
  • 3. Kubernetes key concepts
  • 4. Understanding container orchestration importance
Topic 3: VM Deployment and Provisioning10%- Cloud Init
  • 1. Using cloud-init for instance initialization
  • 2. Cloud-init configuration and modules
- Vagrant
  • 1. Provisioning of virtual machines with Vagrant
  • 2. Use Vagrant to manage virtual machines
  • 3. Vagrantfiles and providers
- Packer
  • 1. Packer templates and builders
  • 2. Using Packer for automated image building
- Cloud Management Tools
  • 1. Common offerings in public clouds
  • 2. Basic feature knowledge of commonly available cloud management tools

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Lpi LPIC-3 Exam 305: Virtualization and Containerization Sample Questions (Q52-Q57):

NEW QUESTION # 52
Which of the following network interface types are valid in an LXD container configuration? (Choose three.)

Answer: B,D,E


NEW QUESTION # 53
Which of the following values are valid in the type attribute of a<domain>element in a libvirt domain definition? (Choose two.)

Answer: A,D

Explanation:
Explanation
The type attribute of a <domain> element in a libvirt domain definition specifies the hypervisor used for running the domain. The allowed values are driver specific, but include "xen", "kvm", "hvf" (since 8.1.0 and QEMU 2.12), "qemu" and "lxc"1. Therefore, the valid values among the options are C. kvm and E. lxc. KVM stands for Kernel-based Virtual Machine, which is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V)2. LXC stands for Linux Containers, which is an operating system-level virtualization method for running multiple isolated Linux systems (containers) on a single control host3. The other options are not valid values for the type attribute, asthey are either not hypervisors or not supported by libvirt. References:http://libvirt.org/formatdomain.html
https://libvirt.org/formatcaps.html


NEW QUESTION # 54
Which of the following statements are true about sparse images in the context of virtual machine storage?
(Choose two.)

Answer: A,E

Explanation:
Sparse images are a type of virtual disk images that grow in size as data is written to them, but do not shrink when data is deleted from them. Sparse images may consume an amount of space different from their nominal size, which is the maximum size that the image can grow to. For example, a sparse image with a nominal size of 100 GB may only take up 20 GB of physical storage if only 20 GB of data is written to it. Sparse images allocate backend storage at the first usage of a block, which means that the physical storage is only used when the virtual machine actually writes data to a block. This can save storage space and improve performance, as the image does not need to be pre-allocated or zeroed out.
Sparse images are not automatically shrunk when files within the image are deleted, because the virtual machine does not inform the host system about the freed blocks. To reclaim the unused space, a special tool such as virt-sparsify1 or qemu-img2 must be used to compact the image. Sparse images can be used with both full virtualization and paravirtualization, as the type of virtualization does not affect the format of the disk image. Sparse images are not automatically resized when their maximum capacity is about to be exceeded, because this would require changing the partition table and the filesystem of the image, which is not a trivial task. To resize a sparse image, a tool such as virt-resize3 or qemu-img2 must be used to increase the nominal size and the filesystem size of the image. References: 1 (search for "virt-sparsify"), 2 (search for "qemu- img"), 3 (search for "virt-resize").


NEW QUESTION # 55
Which of the following commands lists all differences between the disk images vm1-snap.img and vm1.img?

Answer: D

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 # 56
Which of the following statements is true regarding the following output ofxl list:

Answer: C

Explanation:
Explanation
The output of xl list shows the state of the domains. The domain with ID 6, Ubuntu, has a state of "b-". This means that the domain is blocked, which means it is idle or waiting for I/O.
https://xenbits.xen.org/docs/unstable/man/xl.1.html


NEW QUESTION # 57
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