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Lpi 305-300 Exam Syllabus Topics:

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

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Lpi LPIC-3 Exam 305: Virtualization and Containerization Sample Questions (Q122-Q127):

NEW QUESTION # 122
FILL BLANK
What LXC command starts a new process within a running LXC container? (Specify ONLY the command without any path or parameters.)

Answer:

Explanation:
lxc-attach


NEW QUESTION # 123
What is the primary advantage of container virtualization compared to traditional virtualization?

Answer: A

Explanation:
The primary advantage of container virtualization isfaster startup times. Containers share the host OS kernel and do not require booting a full guest operating system, allowing them to start in seconds or milliseconds.
While containers also use fewer resources, the most commonly cited primary benefit in documentation is rapid startup and scalability, makingBthe correct answer.


NEW QUESTION # 124
Which of the following statements are true about sparse images in the context of virtual machine storage?
(Choose two.)

Answer: C,D


NEW QUESTION # 125
Which of the following statements are true about sparse images in the context of virtual machine storage?
(Choose two.)

Answer: C,D

Explanation:
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 # 126
Which of the following statements is true regarding networking with libvirt?

Answer: B

Explanation:
Libvirt supports creating and managing various types of virtual networks that can be used to connect virtual machines to each other or to the external network. One of the common types of virtual networks is the NAT- based network, which uses network address translation (NAT) to allow virtual machines to access the outside world through the host's network interface. By default, libvirt creates a NAT-based network called 'default' when it is installed and started. This network appears as a standard Linux bridge device on the host system, named virbr0. The bridge device has an IP address of 192.168.122.1/24 and acts as a gateway and a DHCP server for the virtual machines connected to it. The bridge device also has iptables rules to forward and masquerade the traffic from and to the virtual machines. The virtual machines connected to the 'default' network have their own IP addresses in the 192.168.122.0/24 range and their own MAC addresses generated by libvirt. The virtual machines can communicate with each other, with the host, and with the external network through the bridge device and the NAT mechanism12.
The other statements in the question are false regarding networking with libvirt. Libvirt's network functionality is not limited to connecting virtual machines to a physical network interface of the host system. Libvirt can also create isolated networks that do not have any connection to the outside world, or routed networks that use static routes to connect virtual machines to the external network without NAT3.
Libvirt does not assign the same MAC address to all virtual machines and isolate their network interfaces at the link layer. Libvirt assigns a unique MAC address to each virtual machine and allows them to communicate with each other at the network layer4. Libvirt does not require a dedicated network interface that may not be used by the host system. Libvirt can share the host's network interface with the virtual machines using NAT or bridging, or it can pass a physical network interface to a virtual machine exclusively using PCI passthrough5. Libvirt does not support exactly one virtual network and connect all virtual machines to it. Libvirt supports creating and managing multiple virtual networks with different names and configurations, and connecting virtual machines to different networks according to their needs6. References:
* libvirt: Virtual Networking
* libvirt: NAT forwarding (aka "virtual networks")
* libvirt: Routed network
* libvirt: MAC address
* libvirt: PCI passthrough of host network devices
* [libvirt: Network XML format]


NEW QUESTION # 127
......

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