Guide (New 2025) Actual Lpi 305-300 Exam Questions
305-300 Exam Dumps Pass with Updated 2025 Certified Exam Questions
The LPIC-3 Exam 305 is intended for experienced IT professionals who have a deep understanding of virtualization and containerization technologies. 305-300 exam consists of 60 multiple-choice and fill-in-the-blank questions, and candidates have 90 minutes to complete it. To pass the exam, candidates must score at least 500 out of 800 points. 305-300 exam is available in English, German, Portuguese, and Spanish, and it can be taken at Pearson VUE testing centers worldwide. Obtaining the LPIC-3 certification can help IT professionals advance their careers by demonstrating their expertise in virtualization and containerization technologies, which are becoming increasingly important in today's IT landscape.
NEW QUESTION # 30
Which of the following statements about the commandlxc-checkpointis correct?
- A. It creates a container image based on an existing container.
- B. It doubles the memory consumption of the container.
- C. It creates a clone of a container.
- D. It only works on stopped containers.
- E. It writes the status of the container to a file.
Answer: E
NEW QUESTION # 31
Which of the following tasks are part of a hypervisor's responsibility? (Choose two.)
- A. Map the resources of virtual machines to the resources of the host system.
- B. Isolate the virtual machines and prevent unauthorized access to resources of other virtual machines.
- C. Manage authentication to network services running inside a virtual machine.
- D. Create filesystems during the installation of new virtual machine quest operating systems.
- E. Provide host-wide unique PIDs to the processes running inside the virtual machines in order to ease inter-process communication between virtual machines.
Answer: A,B
NEW QUESTION # 32
Which of the following statements are true about sparse images in the context of virtual machine storage?
(Choose two.)
- A. Sparse images are automatically shrunk when files within the image are deleted.
- B. Sparse images can only be used in conjunction with paravirtualization.
- C. Sparse images allocate backend storage at the first usage of a block.
- D. Sparse images may consume an amount of space different from their nominal size.
- E. Sparse images are automatically resized when their maximum capacity is about to be exceeded.
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 # 33
Which of the following resources can be limited by libvirt for a KVM domain? (Choose two.)
- A. Number of running processes
- B. Number of available files
- C. File systems allowed in the domain
- D. Amount of CPU lime
- E. Size of available memory
Answer: D,E
NEW QUESTION # 34
Which of the following commands deletes all volumes which are not associated with a container?
- A. docker volume cleanup
- B. docker volume garbage-collect
- C. docker volume orphan -d
- D. docker volume prune
- E. docker volume vacuum
Answer: D
Explanation:
Explanation
The command that deletes all volumes which are not associated with a container is docker volume prune. This command removes all unused local volumes, which are those that are not referenced by any containers. By default, it only removes anonymous volumes, which are those that are not given a specific name when they are created. To remove both unused anonymous and named volumes, the --all or -a flag can be added to the command. The command will prompt for confirmation before deleting the volumes, unless the --force or -f flag is used to bypass the prompt. The command will also show the total reclaimed space after deleting the volumes12.
The other commands listed in the question are not valid or do not have the same functionality as docker volume prune. They are either made up, misspelled, or have a different purpose. These commands are:
* docker volume cleanup: This command does not exist in Docker. There is no cleanup subcommand for docker volume.
* docker volume orphan -d: This command does not exist in Docker. There is no orphan subcommand for docker volume, and the -d flag is not a valid option for any docker volume command.
* docker volume vacuum: This command does not exist in Docker. There is no vacuum subcommand for docker volume.
* docker volume garbage-collect: This command does not exist in Docker. There is no garbage-collect subcommand for docker volume.
References:
* docker volume prune | Docker Docs
* How to Remove all Docker Volumes - YallaLabs.
NEW QUESTION # 35
Which functionality is provided by Vagrant as well as by Docker? (Choose three.)
- A. Both can download required base images.
- B. Both start system images as virtual machines instead of containers bv default.
- C. Both can share directories from the host file system to a guest.
- D. Both can apply changes to a base image.
- E. Both start system images as containers instead of virtual machines by default.
Answer: A,C,D
Explanation:
* Both Vagrant and Docker can share directories from the host file system to a guest. This allows the guest to access files and folders from the host without copying them. Vagrant uses the config.vm.synced_folder option in the Vagrantfile to specify the shared folders1. Docker uses the -v or --volume flag in the docker run command to mount a host directory as a data volume in the container2.
* Both Vagrant and Docker can download required base images. Base images are the starting point for creating a guest environment. Vagrant uses the config.vm.box option in the Vagrantfile to specify the base image to use1. Docker uses the FROM instruction in the Dockerfile to specify the base image to use2. Both Vagrant and Docker can download base images from public repositories or local sources.
* Both Vagrant and Docker can apply changes to a base image. Changes are modifications or additions to the base image that customize the guest environment. Vagrant uses provisioners to run scripts or commands on the guest after it is booted1. Docker uses instructions in the Dockerfile to execute commands on the baseimage and create a new image2. Both Vagrant and Docker can save the changes to a new image or discard them after the guest is destroyed.
* Vagrant and Docker differ in how they start system images. Vagrant starts system images as virtual machines by default, using a provider such as VirtualBox, VMware, or Hyper-V1. Docker starts system images as containers by default, using the native containerization functionality on macOS, Linux, and Windows2. Containers are generally more lightweight and faster than virtual machines, but less secure and flexible. References: 1: Vagrant vs. Docker | Vagrant | HashiCorp Developer 2: Vagrant vs Docker:
Which Is Right for You? (Could Be Both) - Kinsta Web Development Tools
NEW QUESTION # 36
Which of the following commands lists all differences between the disk images vm1-snap.img and vm1.img?
- A. virt-delta -a vm1-snap.img -A vm1.img
- B. virt-diff -a vm1-snap.img -A vm1.img
- C. virt-history -a vm1-snap.img -A vm1.img
- D. virt-cmp -a vm1-snap.img -A vm1.img
- E. virt-cp-in -a vm1-snap.img -A vm1.img
Answer: B
NEW QUESTION # 37
Which CPU flag indicates the hardware virtualization capability on an AMD CPU?
- A. VMX
- B. PVM
- C. SVM
- D. HVM
- E. VIRT
Answer: C
Explanation:
Explanation
The CPU flag that indicates the hardware virtualization capability on an AMD CPU is SVM. SVM stands for Secure Virtual Machine, and it is a feature of AMD processors that enables the CPU to run virtual machines with hardware assistance. SVM is also known as AMD-V, which is AMD's brand name for its virtualization technology. SVM allows the CPU to support a hypervisor, which is a software layer that creates and manages virtual machines. A hypervisor can run multiple virtual machines on a single physical machine, each with its own operating system and applications. SVM improves the performance and security of virtual machines by allowing the CPU to directly execute privileged instructions and handle memory access, instead of relying on software emulation or binary translation. SVM also provides nested virtualization, which is the ability to run avirtual machine inside another virtual machine. To use SVM, the CPU must support it and the BIOS must enable it. The user can check if the CPU supports SVM by looking for the svm flag in the /proc/cpuinfo file or by using the lscpu command. The user can also use the virt-host-validate command to verify if the CPU and the BIOS are properly configured for hardware virtualization123. References:
* How to check if CPU supports hardware virtualization (VT technology)1
* Processor support - KVM3
* How to Enable Virtualization in BIOS for Intel and AMD4
NEW QUESTION # 38
Which of the following statements are true regarding VirtualBox?
- A. It requires dedicated shared storage, as it cannot store virtual machine disk images locally on block devices of the virtualization host.
- B. It is available for Linux only and requires the source code of the currently running Linux kernel to be available.
- C. It is a hypervisor designed as a special kernel that is booted before the first regular operating system starts.
- D. It provides both a graphical user interface and command line tools to administer virtual machines.
- E. It only supports Linux as a guest operating system and cannot run Windows inside a virtual machine.
Answer: D
Explanation:
Explanation
VirtualBox is a hosted hypervisor, which means it runs as an application on top of an existing operating system, not as a special kernel that is booted before the first regular operating system starts1. VirtualBox supports a large number of guest operating systems, including Windows, Linux, Solaris, OS/2, and OpenBSD1. VirtualBox does not require dedicated shared storage, as it can store virtual machine disk images locally on block devices of the virtualization host, or on network shares, or on iSCSI targets1. VirtualBox provides both a graphical user interface (GUI) and command line tools (VBoxManage) to administer virtual machines1. VirtualBox is available for Windows, Linux, macOS, and Solaris hosts1, and does not require the source code of the currently running Linux kernel to be available. References:
* Oracle VM VirtualBox: Features Overview
NEW QUESTION # 39
Which of the following commands moves the libvirt domainweb1from the current host system to the host systemhost2?
- A. virsh cp .:web1 host2:web1
- B. virsh patch web1 .Domain.Node=host2
- C. virsh migrate web1 qemu+ssh://host2/system
- D. virsh node-update host1=-dom:web1 host2=+dom:web1
- E. virsh pool-add host2 web1
Answer: C
Explanation:
Explanation
The correct command to move the libvirt domain web1 from the current host system to the host system host2 is virsh migrate web1 qemu+ssh://host2/system. This command uses the virsh migrate command, which initiates the live migration of a domain to another host1. The first argument is the name of the domain to migrate, which in this case is web1. The second argument is the destination URI, which specifies the connection to the remote host and the hypervisor to use2. In this case, the destination URI is qemu+ssh://host2/system, which means to use the QEMU driver and connect to host2 via SSH, and use the system instance of libvirtd3. The other options are incorrect because they either use invalid commands or arguments, such as node-update, pool-add, patch, or cp, or they do not specify the destination URI correctly.
References:
https://balamuruhans.github.io/2019/01/09/kvm-migration-with-libvirt.html
http://libvirt.org/migration.html
NEW QUESTION # 40
Which statement is true regarding the Linux kernel module that must be loaded in order to use QEMU with hardware virtualization extensions?
- A. It must be loaded into the kernel of the host system only if the console of a virtual machine will be connected to a physical console of the host system
- B. It must be loaded into the kernel of the first virtual machine as it interacts with the QEMU bare metal hypervisor and is required to trigger the start of additional virtual machines
- C. It must be loaded into the kernel of each virtual machine to provide Para virtualization which is required by QEMU.
- D. It must be loaded into the kernel of each virtual machine that will access files and directories from the host system's file system.
- E. It must be loaded into the Kernel of the host system in order to use the visualization extensions of the host system's CPU
Answer: E
Explanation:
Explanation
The Linux kernel module that must be loaded in order to use QEMU with hardware virtualization extensions is KVM (Kernel-based Virtual Machine). KVM is a full virtualization solution that allows a user space program (such as QEMU) to utilize the hardware virtualization features of various processors (such as Intel VT or AMD-V). KVM consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. KVM must be loaded into the kernel of the host system in order to use the virtualization extensions of the host system's CPU. This enables QEMU to run multiple virtual machines with unmodified Linux or Windows images, each with private virtualized hardware. KVM is integrated with QEMU, so there is no need to load it into the kernel of each virtual machine or the first virtual machine. KVM also does not require paravirtualization, which is a technique that modifies the guest operating system to communicate directly with the hypervisor, bypassing the emulation layer. References:
* Features/KVM - QEMU
* Kernel-based Virtual Machine
* KVM virtualization on Red Hat Enterprise Linux 8 (2023)
NEW QUESTION # 41
What is the default provider of Vagrant?
- A. hyperv
- B. docker
- C. virtualbox
- D. vmware_workstation
- E. lxc
Answer: C
Explanation:
Explanation
Vagrant is a tool that allows users to create and configure lightweight, reproducible, and portable development environments. Vagrant supports multiple providers, which are the backends that Vagrant uses to create and manage the virtual machines. By default, VirtualBox is the default provider for Vagrant. VirtualBox is still the most accessible platform to use Vagrant: it is free, cross-platform, and has been supported by Vagrant for years. With VirtualBox as the default provider, it provides the lowest friction for new users to get started with Vagrant. However, users can also use other providers, such as VMware, Hyper-V, Docker, or LXC, depending on their preferences and needs. To use another provider, users must install it as a Vagrant plugin and specify it when running Vagrant commands. Users can also change the default provider by setting the VAGRANT_DEFAULT_PROVIDER environmental variable. References:
* Default Provider - Providers | Vagrant | HashiCorp Developer1
* Providers | Vagrant | HashiCorp Developer2
* How To Set Default Vagrant Provider to Virtualbox3
NEW QUESTION # 42
In order to use the optiondom0_memto limit the amount of memory assigned to the Xen Domain-0, where must this option be specified?
- A. In the configuration file /etc/xen/Domain-0.cfg, when Xen starts.
- B. In its .config file, when the Domain-0 kernel is built.
- C. In its Makefile, when Xen is built.
- D. In any of Xen's global configuration files.
- E. In the bootloader configuration, when Xen is booted.
Answer: E
NEW QUESTION # 43
After setting up a data container using the following command:
docker create -v /data --name datastore debian /bin/true
how is an additional new container started which shares the/datavolume with the datastore container?
- A. docker run --volume-backend datastore -v /data --name service debian bash
- B. docker run --share-with datastore --name service debian bash
- C. docker run -v /data --name service debian bash
- D. docker run --volumes-from datastore --name service debian bash
- E. docker run -v datastore:/data --name service debian bash
Answer: D
Explanation:
Explanation
The correct way to start a new container that shares the /data volume with the datastore container is to use the
--volumes-from flag. This flag mounts all the defined volumes from the referenced containers. In this case, the datastore container has a volume named /data, which is mounted in the service container at the same path. The other options are incorrect because they either use invalid flags, such as --share-with or --volume-backend, or they create new volumes instead of sharing the existing one, such as -v datastore:/data or -v /data. References:
* Docker Docs - Volumes
* Stack Overflow - How to map volume paths using Docker's --volumes-from?
* Docker Docs - docker run
NEW QUESTION # 44
After setting up a data container using the following command:
docker create -v /data --name datastore debian /bin/true
how is an additional new container started which shares the/datavolume with the datastore container?
- A. docker run --volume-backend datastore -v /data --name service debian bash
- B. docker run --share-with datastore --name service debian bash
- C. docker run -v /data --name service debian bash
- D. docker run --volumes-from datastore --name service debian bash
- E. docker run -v datastore:/data --name service debian bash
Answer: D
NEW QUESTION # 45
Which of the following commands boots a QEMU virtual machine using hardware virtualization extensions?
- A. qvm start -vmx -drive file=debian.img -cdrom debian.iso -m 1024 -boot d
- B. vm -kvm -drive file=debian.img -cdrom debian.iso -m 1024 -boot d
- C. qvirt -create -drive file=debian.img -cdrom debian.iso -m 1024 -boot d -driver hvm
- D. qemu -accel kvm -drive file-debian.img -cdrom debian.iso -m 1024 -boot d
- E. qemu-hw -create -drive file=debian.img -cdrom debian.iso -m 1024 -boot d
Answer: D
NEW QUESTION # 46
FILL BLANK
Which subcommand ofvirshopens the XML configuration of a virtual network in an editor in order to make changes to that configuration? (Specify ONLY the subcommand without any parameters.)
Answer:
Explanation:
net-edit
NEW QUESTION # 47
In an IaaS cloud, what is a common method for provisioning new computing instances with an operating system and software?
- A. Each new instance is connected to the installation media of a Linux distribution and provides access to the installer by logging in via SSH.
- B. Each new instance contains a minimal live system running from a virtual CD as the basis from which the administrator deploys the target operating system.
- C. Each new instance is connected via a VPN with the computer that started the provisioning and tries to PXE boot from that machine.
- D. Each new instance is a clone of another currently running instance that includes all the software, data and state of the original instance.
- E. Each new instance is created based on an image file that contains the operating system as well as software and default configuration for a given purpose.
Answer: E
Explanation:
Explanation
In an IaaS cloud, the most common method for provisioning new computing instances is to use an image file that contains a pre-installed operating system and software. This image file is also known as a machine image, a virtual appliance, or a template. The image file can be customized for a specific purpose, such as a web server, a database server, or a development environment. The image file can be stored in a repository or a library that is accessible by the cloud provider or the user. When a new instance is requested, the cloud provider copies the image file to a virtual disk and attaches it to the instance. The instance then boots from the virtual disk and runs the operating system and software from the image file. This method is faster and more efficient than installing the operating system and software from scratch for each new instance. It also ensures consistency and reliability across multiple instances that use the same image file. References:
* LPI Virtualization and Containerization Exam Objectives, Topic 305.1: Virtualization Concepts and Theory, Objective: Describe the concept of machine images and templates
* LPI Virtualization and Containerization Study Guide, Chapter 1: Virtualization Concepts and Theory, Section: Machine Images and Templates
* LPI LPIC-3 305 Certification Sample Questions and Practice Exam, Question 10: In an IaaS cloud, what is a common method for provisioning new computing instances with an operating system and software?
NEW QUESTION # 48
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Lpi 305-300 (LPIC-3 Exam 305: Virtualization and Containerization) Certification Exam is a globally recognized certification exam that is designed to test the skills and knowledge of professionals in the field of virtualization and containerization. LPIC-3 Exam 305: Virtualization and Containerization certification is a part of the Linux Professional Institute's LPIC-3 program, which is designed to provide advanced-level certification for Linux professionals.
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