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Free PDF 305-300 - Authoritative Valid Exam LPIC-3 Exam 305: Virtualization and Containerization Book

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The Lpi 305-300 exam covers a wide spectrum of topics, ranging from basic virtualization concepts to advanced containerization techniques. The test-takers will be tested on their knowledge of virtualization technologies, such as KVM, Xen, and VMware, as well as containerization technologies such as Docker and Kubernetes. They will also be assessed on their ability to manage and secure virtualized and containerized environments, including storage and network management, backup, and disaster recovery.

The Lpi 305-300 Exam covers a wide range of topics, including virtualization technologies such as KVM, Xen, and VirtualBox, as well as containerization technologies such as Docker, Kubernetes, and OpenShift. The test also covers key concepts such as virtual network configuration, storage management, and system installation and configuration. This comprehensive exam is designed to ensure that a certified professional can effectively manage virtualization and containerization environments in real-world scenarios.

Lpi LPIC-3 Exam 305: Virtualization and Containerization Sample Questions (Q40-Q45):

NEW QUESTION # 40
Which file in acgroupdirectory contains the list of processes belonging to thiscgroup?

A. members
B. pids
C. subjects
D. procs
E. casks

Answer: D

Explanation:
Explanation
The file procs in a cgroup directory contains the list of processes belonging to this cgroup. Each line in the file shows the PID of a process that is a member of the cgroup. A process can be moved to a cgroup by writing its PID into the cgroup's procs file. For example, to move the process with PID 24982 to the cgroup cg1, the following command can be used: echo 24982 > /sys/fs/cgroup/cg1/procs1. The file procs is different from the file tasks, which lists the threads belonging to the cgroup. The file procs can be used to move all threads in a thread group at once, while the file tasks can be used to move individual threads2. References:
* Creating and organizing cgroups cgroup2 - GitHub Pages
* Control Groups - The Linux Kernel documentation

NEW QUESTION # 41
Which of the following commands executes a command in a running LXC container?

A. lxc-enter
B. lxc-run
C. lxc-batch
D. lxc-accach
E. lxc-eval

Answer: D

Explanation:
Explanation
The command lxc-attach is used to execute a command in a running LXC container. It allows the user to start a process inside the container and attach to its standard input, output, and error streams1. For example, the command lxc-attach -n mycontainer -- ls -lh /home will list all the files and directories in the /home directory of the container named mycontainer1. The other options are not valid LXC commands. The command lxc-batch does not exist. The command lxc-run is an alias for lxc-start, which is used to start a container, not to execute a command in it2. The command lxc-enter is also an alias for lxc-attach, but it is deprecated and should not be used3. The command lxc-eval is also not a valid LXC command. References:
* 1: Executing a command inside a running LXC - Unix & Linux Stack Exchange.
* 2: lxc-start: start a container. - SysTutorials.
* 3: lxc-attach: start a process inside a running container. - SysTutorials.

NEW QUESTION # 42
Which of the following mechanisms are used by LXC and Docker to create containers? (Choose three.)

A. Kernel Namespaces
B. Linux Capabilities
C. POSIXACLs
D. File System Permissions
E. Control Groups

Answer: A,B,E

NEW QUESTION # 43
A clone of a previously used virtual machine should be created. All VM specific information, such as user accounts, shell histories and SSH host keys should be removed from the cloned disk image. Which of the following tools can perform these tasks?

A. vire-wipe
B. virt-svspre
C. virt-sparsi
D. virc-reset
E. virt-rescue
F. sysprep

Answer: F

Explanation:
Explanation
Sysprep is a tool that removes all your personal account and security information, and then prepares the machine to be used as an image. It is supported by Windows and some Linux distributions. It can also remove drivers and other machine-specific settings. Sysprep is required when creating a managed image outside of a gallery in Azure
https://learn.microsoft.com/en-us/azure/virtual-machines/generalize

NEW QUESTION # 44
Which of the following statements is true regarding networking with libvirt?

A. Libvirt's network functionality is limited to connecting virtual machines to a physical network interface of the host system.
B. Libvirt supports exactly one virtual network and connects all virtual machines to it.
C. Libvirt networks appear, by default, as standard Linux bridges in the host system.
D. Libvirt assiqns the same MAC address to all virtual machines and isolates their network interfaces at the link layer.
E. Libvirt requires a dedicated network interface that may not be used by the host system.

Answer: C

Explanation:
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 # 45
......

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