2026 Best 305-300 Exam Preparation Material with New Dumps Questions
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The LPIC-3 Exam 305: Virtualization and Containerization is a vendor-neutral certification that is recognized globally. It is designed to provide IT professionals with the skills and knowledge required to design, implement, and manage virtualization and containerization solutions in a variety of environments, including data centers, cloud environments, and hybrid environments.
Following is the info about the Passing Score, Duration & Questions for the LPI 305-300 Exam
- The passing score: 70%
- Number of Questions: 60 questions
- Languages: English
- Time Duration: 90 minutes
- Format: multiple-choice and fill in the blank questions
Lpi 305-300 exam is part of the LPIC-3 certification program, which is a professional certification for Linux experts. 305-300 exam focuses on virtualization and containerization, which are essential skills for any Linux professional. The LPIC-3 certification program is designed to validate advanced skills and knowledge in Linux administration, and passing the 305-300 exam is one of the requirements for achieving this certification.
NEW QUESTION # 26
What is the purpose of the commandvagrant init?
- A. It installs Vagrant on a Linux host.
- B. It creates a Vagrant configuration file.
- C. It downloads a Vagrant box.
- D. It starts a Vagrant box.
- E. It executes a provisioning tool in a running box.
Answer: B
Explanation:
The command vagrant init is used to initialize the current directory to be a Vagrant environment by creating an initial Vagrantfile if one does not already exist1. The Vagrantfile contains the configuration settings for the Vagrant box, such as the box name, box URL, network settings, synced folders, provisioners, etc. The command vagrant init does not execute any provisioning tool, start any box, install Vagrant on a Linux host, or download any box. Those actions are performed by other Vagrant commands, such as vagrant provision, vagrant up, vagrant install, and vagrant box add, respectively. References:
* 1: vagrant init - Command-Line Interface | Vagrant | HashiCorp Developer
NEW QUESTION # 27
Which of the following commands moves the libvirt domainweb1from the current host system to the host systemhost2?
- A. virsh patch web1 .Domain.Node=host2
- B. virsh migrate web1 qemu+ssh://host2/system
- C. virsh cp .:web1 host2:web1
- D. virsh node-update host1=-dom:web1 host2=+dom:web1
- E. virsh pool-add host2 web1
Answer: B
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 # 28
FILL BLANK
What is the default path to the Docker daemon configuration file on Linux? (Specify the full name of the file, Including path.)
Answer:
Explanation:
/etc/docker/daemon.json
Explanation:
The default path to the Docker daemon configuration file on Linux is /etc/docker/daemon.json. This file is a JSON file that contains the settings and options for the Docker daemon, which is the service that runs on the host operating system and manages the containers, images, networks, and other Docker resources. The /etc
/docker/daemon.json file does not exist by default, but it can be created by the user to customize the Docker daemon behavior. The file can also be specified by using the --config-file flag when starting the Docker daemon. The file must be a valid JSON object and follow the syntax and structure of the dockerd reference docs12. References:
* Docker daemon configuration file - Medium3
* Docker daemon configuration overview | Docker Docs4
* docker daemon | Docker Docs5
NEW QUESTION # 29
What does IaaS stand for?
- A. Instances as a Service
- B. Information as a Service
- C. Infrastructure as a Service
- D. Intelligence as a Service
- E. Integration as a Service
Answer: C
NEW QUESTION # 30
Which command in the KVM monitor restores a snapshot?
Answer:
Explanation:
loadvm
Explanation:
In KVM and QEMU-based virtualization environments, the QEMU monitor provides an interactive interface for managing virtual machine runtime operations. According to KVM documentation, the command used to restore a previously saved snapshot within the monitor is loadvm.
Snapshots capture the state of a virtual machine at a specific point in time, including CPU state, memory, and disk state (depending on configuration). The loadvm command allows administrators to revert a virtual machine back to that saved state, which is especially useful for testing, debugging, and recovery scenarios.
This command is typically used in conjunction with the savevm command, which creates snapshots. The functionality is supported primarily with disk formats such as QCOW2, which allow snapshot capabilities.
Therefore, the correct and documented command is loadvm.
NEW QUESTION # 31
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 each virtual machine that will access files and directories from the host system's file system.
- B. It must be loaded into the Kernel of the host system in order to use the visualization extensions of the host system's CPU
- C. 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
- D. It must be loaded into the kernel of each virtual machine to provide Para virtualization which is required by QEMU.
- E. 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
Answer: B
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 # 32
Which of the following components are essential in Docker architecture? (Select all that apply)
- A. Docker Registry
- B. Docker Client
- C. Docker Daemon
- D. Docker Compose
Answer: A,B,C
Explanation:
Docker architecture consists of several core components that enable container creation and management.
According to Docker documentation, theDocker Client,Docker Daemon, andDocker Registryare essential components.
TheDocker Clientis the user-facing command-line interface that sends commands to the daemon. TheDocker Daemon (dockerd)performs the heavy lifting, such as building images, running containers, and managing networks and storage. TheDocker Registrystores container images, enabling image distribution and reuse.
Docker Composeis an optional orchestration tool used to define and run multi-container applications, but it is not an essential architectural component.
Therefore, the correct answers areA, C, and D.
NEW QUESTION # 33
When setting up a KVM virtualization host, which one of the following components is NOT required?
- A. bridgeutils
- B. virsh
- C. libvirt
- D. kvm kernel modules
- E. qemu
Answer: B
Explanation:
When configuring a KVM-based virtualization host, several core components are mandatory to enable and manage virtual machines. According to KVM and virtualization documentation,KVM kernel modulesare essential because they provide hardware-assisted virtualization support within the Linux kernel.QEMUis required to perform hardware emulation and manage virtual machine execution.Libvirtacts as the virtualization management API, enabling centralized and secure control of virtual machines. Additionally, bridgeutilsis commonly required to configure network bridges, allowing virtual machines to communicate with external networks.
However,virshisnot strictly required. Virsh is acommand-line utilitythat interacts with libvirt to manage virtual machines, but it is only amanagement interface, not a core dependency. Virtual machines can still be created and managed using alternative tools such asvirt-manager, Ansible, OpenStack, or custom API- based solutionswithout virsh being installed.
Virtualization documentation clearly distinguishes betweenessential backend components(KVM, QEMU, libvirt) andoptional management tools(virsh). Therefore, while virsh is widely used and highly recommended for administrative convenience, it isnot a mandatory componentfor a functional KVM virtualization host.
NEW QUESTION # 34
What is the purpose of a .dockerignore file?
- A. It lists files existing in a Docker image which should be excluded when building a derivative image.
- B. It specifies files that Docker does not submit to the Docker daemon when building a Docker image
- C. It specifies which parts of a Dockerfile should be ignored when building a Docker image.
- D. It exists in the root file system of containers that should ignore volumes and ports provided by Docker.
- E. It must be placed in the top level directory of volumes that Docker should never attach automatically to a container
Answer: B
Explanation:
The purpose of a .dockerignore file is to specify files that Docker does not submit to the Docker daemon when building a Docker image. A .dockerignore file is a text file that contains a list of files or directories that should be excluded from the build context, which is the set of files and folders that are available for use in a Dockerfile. By using a .dockerignore file, you can avoid sending files or directories that are large, contain sensitive information, or are irrelevant to the Docker image to the daemon, which can improve the efficiency and security of the build process. The other options are incorrect because they do not describe the function of a .dockerignore file. Option A is wrong because a .dockerignore file does not affect the files existing in a Docker image, but only the files sent to the daemon during the build. Option C is wrong because a .
dockerignore file does not exist in the root file system of containers, but in the same directory as the Dockerfile. Option D is wrong because a .dockerignore file does not affect the volumes that Docker attaches to a container, but only the files included in the build context. Option E is wrong because a .dockerignore file does not affect the parts of a Dockerfile that are executed, but only the files available for use in a Dockerfile.
References:
* What are .dockerignore files, and why you should use them?
* Dockerfile reference | Docker Docs
* How to use .dockerignore and its importance - Shisho Cloud
NEW QUESTION # 35
How can data be shared between several virtual machines running on the same Linux-based host system?
- A. By mounting other virtual machines' file systems from /dev/virt-disks/remote/.
- B. By attaching the same virtual hard disk to all virtual machines and activating EXT4 sharing extensions on it.
- C. By using a network file system or file transfer protocol.
- D. By setting up a ramdisk in one virtual machine and mounting it using its UUID in the other VMs.
- E. By writing data to the file system since all virtual machines on the same host system use the same file system.
Answer: C
Explanation:
Explanation
The correct way to share data between several virtual machines running on the same Linux-based host system is by using a network file system or file transfer protocol. A network file system (NFS) is a distributed file system protocol that allows a user on a client computer to access files over a network in a manner similar to how local storage is accessed1. A file transfer protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network2. Both methods allow data to be shared between virtual machines regardless of their underlying file systems or virtualization technologies. The other options are incorrect because they either do not work or are not feasible. Option A is wrong because each virtual machine has its own file system that is not directly accessible by other virtual machines. Option B is wrong because there is no such device as /dev/virt-disks/remote/ that can be used to mount other virtual machines' file systems. Option C is wrong because a ramdisk is a volatile storage device that is not suitable for sharing data between virtual machines. Option E is wrong because attaching the same virtual hard disk to multiple virtual machines can cause data corruption and conflicts, and EXT4 does not have any sharing extensions that can prevent this. References:https://kb.vmware.com/s/article/1012706
https://bing.com/search?q=data+sharing+between+virtual+machines
NEW QUESTION # 36
What is the default provider of Vagrant?
- A. hyperv
- B. lxc
- C. virtualbox
- D. docker
- E. vmware_workstation
Answer: C
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 # 37
What are cloud management tools primarily used for?
- A. Creating containerized applications
- B. Managing physical servers
- C. Monitoring network traffic
- D. Provisioning and managing virtual machines in the cloud
Answer: D
Explanation:
Cloud management tools are primarily used toprovision, manage, and control virtual machines and related resourcesin cloud environments. According to cloud computing documentation, these tools provide capabilities such as VM lifecycle management, resource allocation, scaling, policy enforcement, and automation via APIs.
While some tools include monitoring features, their main function is not network traffic analysis. They also do not focus on managing bare-metal servers or creating containerized applications directly.
Therefore, the correct answer isB.
NEW QUESTION # 38
Which virtualization platforms can Vagrant be used with? (Select all that apply)
- A. VirtualBox
- B. Docker
- C. VMware
- D. Haws
Answer: A,B,C
Explanation:
Vagrant supports multipleproviders, allowing it to work with different virtualization and container platforms.
According to official Vagrant documentation, supported providers includeVirtualBox,VMware, andDocker.
VirtualBox is the default and most commonly used provider. VMware is supported through official plugins.
Docker is also supported as a provider, enabling lightweight container-based development environments.
Option D ("Haws") is an apparent typographical error and does not correspond to a valid virtualization platform. While Vagrant can integrate with AWS via community or third-party plugins, the option as written is invalid.
Therefore, the correct answers areA, B, and C.
NEW QUESTION # 39
The commandvirsh vol-list vmsreturns the following error:
error: failed to get pool 'vms'
error: Storage pool not found: no storage pool with matching name 'vms ' Given that the directory/vmsexists, which of the following commands resolves this issue?
- A. virsh pool-create-as vms dir --target /vms
- B. libvirt-poolctl new --name=/vms --type=dir --path=/vms
- C. dd if=/dev/zero of=/vms bs=1 count=0 flags=name:vms
- D. touch /vms/.libvirtpool
- E. qemu-img pool vms:/vms
Answer: A
Explanation:
The command virsh pool-create-as vms dir --target /vms creates and starts a transient storage pool named vms of type dir with the target directory /vms12. This command resolves the issue of the storage pool not found error, as it makes the existing directory /vms visible to libvirt as a storage pool. The other commands are invalid because:
* dd if=/dev/zero of=/vms bs=1 count=0 flags=name:vms is not a valid command syntax. The dd command does not take a flags argument, and the output file /vms should be a regular file, not a directory3.
* libvirt-poolctl new --name=/vms --type=dir --path=/vms is not a valid command name. There is no such command as libvirt-poolctl in the libvirt package4.
* qemu-img pool vms:/vms is not a valid command syntax. The qemu-img command does not have a pool subcommand, and the vms:/vms argument is not a valid image specification5.
* touch /vms/.libvirtpool is not a valid command to create a storage pool. The touch command only creates an empty file, and the .libvirtpool file is not recognized by libvirt as a storage pool configuration file6.
References:
1: virsh - difference between pool-define-as and pool-create-as - Stack Overflow
2: dd(1) - Linux manual page - man7.org
3: 12.3.3. Creating a Directory-based Storage Pool with virsh - Red Hat Customer Portal
4: libvirt - Linux Man Pages (3)
5: qemu-img(1) - Linux manual page - man7.org
6: touch(1) - Linux manual page - man7.org
NEW QUESTION # 40
Which functionality is provided by Vagrant as well as by Docker? (Choose three.)
- A. Both can apply changes to a base image.
- 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 start system images as containers instead of virtual machines by default.
- E. Both can download required base images.
Answer: A,C,E
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 base image 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 # 41
Which command within virsh lists the virtual machines that are running on the current host?
- A. show
- B. list-vm
- C. list
- D. list-all
- E. I view
Answer: C
Explanation:
The command virsh list is used to list all running domains (VMs) on the current host. The command virsh list
--all can be used to list both active and inactive domains. The other options are not valid virsh commands. The command virsh list is a basic command that lists all running domains (VMs). You can also list all configured VMs by adding the --all option. This is useful if you want to see all VMs configured in the target hypervisor that you can use on subsequent commands1. References:
* 1: 8 Linux virsh subcommands for managing VMs on the command line | Enable Sysadmin.
NEW QUESTION # 42
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