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LPIC-3 Exam 305는 가상화 개념, 가상화 배포, 컨테이너 배포 및 컨테이너 관리를 포함하여 가상화 및 컨테이너화 기술과 관련된 다양한 주제를 다룹니다. 이 시험은 또한 KVM, Xen, Docker 및 LXC와 같은 오픈 소스 기술을 사용하여 가상화 및 컨테이너화 된 환경을 배포하고 관리하는 후보자의 능력을 테스트합니다. 응시자는 또한 가상화 및 컨테이너화 보안, 네트워킹 및 스토리지에 대한 지식을 보여줄 것으로 예상됩니다.
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질문 # 59
Which directory is used bycloud-initto store status information and configuration information retrieved from external sources?
정답：E
설명：
cloud-init uses the /var/lib/cloud/ directory to store status information and configuration information retrieved from external sources, such as the cloud platform's metadata service or user data files. The directory contains subdirectories for different types of data, such as instance, data, handlers, scripts, and sem. The instance subdirectory contains information specific to the current instance, such as the instance ID, the user data, and the cloud-init configuration. The data subdirectory contains information about the data sources that cloud-init detected and used. The handlers subdirectory contains information about the handlers that cloud-init executed.
The scripts subdirectory contains scripts that cloud-init runs at different stages of the boot process, such as per- instance, per-boot, per-once, and vendor. The sem subdirectory contains semaphore files that cloud-init uses to track the execution status of different modules and stages. References:
* Configuring and managing cloud-init for RHEL 8 - Red Hat Customer Portal
* vsphere - what is the linux file location where the cloud-init user ...
질문 # 60
In which scenarios would Vagrant be most beneficial for developers?
정답：C
설명：
Vagrant is a tool designed to simplify the creation and management ofreproducible development environments. According to virtualization and containerization documentation, Vagrant is most beneficial whendeveloping and testing applications locally. It allows developers to define virtual machine configurations using a declarative configuration file, ensuring consistent environments across development teams.
Vagrant integrates with virtualization providers such as VirtualBox, KVM, and VMware, enabling developers to spin up lightweight, disposable virtual machines that closely mirror production environments. This reduces the common "works on my machine" problem by standardizing development setups.
Vagrant is not intended for managing network infrastructure, large-scale production environments, or direct cloud deployments. While it can interface with cloud providers, its primary use case remainslocal development and testing, not production operations.
Virtualization notes emphasize that Vagrant is a developer-focused tool that complements infrastructure automation tools rather than replacing them. Therefore, optionDaccurately reflects Vagrant's most appropriate and documented use case.
질문 # 61
When using direct Linux booting to start Linux within a KVM virtual machine, which KVM parameter is used to specify parameters for the Linux kernel?
(Specify ONLY the option name without any values or parameters.)
정답：
설명：
-append
Explanation:
When usingdirect kernel bootingwith KVM/QEMU, the-appendoption is used to passkernel command-line parametersto the Linux kernel. This allows administrators to specify boot-time options such as root filesystem location, console settings, or debugging flags.
Official QEMU documentation lists -append as the correct parameter for kernel arguments, making this answer correct.
질문 # 62
Which disk image formats are commonly used in Linux-based virtualization environments? (Select all that apply)
정답：A,B,C,D
설명：
Linux-based virtualization environments support a wide range of disk image formats to ensure compatibility with multiple hypervisors and cloud platforms. According to virtualization documentation,RAW, VMDK, QCOW2, and VHDare all commonly used formats.
RAWimages are simple, unstructured disk files that offer maximum performance due to minimal overhead.
QCOW2(QEMU Copy-On-Write version 2) is the most widely used format in KVM environments because it supports advanced features such as snapshots, thin provisioning, compression, and encryption.VMDKis the native disk format for VMware products but is frequently used in Linux environments for interoperability and migration purposes.VHDis commonly associated with Microsoft Hyper-V but is also supported by QEMU and cloud platforms.
Virtualization notes emphasize that modern Linux virtualization tools like QEMU and libvirt are designed to work across multiple disk formats. This flexibility enables administrators to migrate workloads between different hypervisors and cloud providers without rebuilding virtual machines.
Therefore, all listed disk image formats are valid and commonly supported in Linux-based virtualization environments.
질문 # 63
When setting up a KVM virtualization host, which one of the following components is NOT required?
정답：A
설명：
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.
질문 # 64
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