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| Section | Objectives |
|---|---|
| Container Orchestration | - Scaling and deployment
|
| Container Virtualization | - Container lifecycle management
|
| Virtualization Concepts and Implementation | - Hypervisors and architectures
|
| Storage, Networking, and Security | - Security
|
305-300 考古題覆蓋了最新的考試指南，確保考生一次性通過 305-300 考試。Lpi 認證專家根據 305-300 考試主題編訂，適合全球的考生使用，提高考生的通過率。LPIC-3 是一張高級網路專家認可證書，亦是全球公認的專業認證。305-300 認證主要的目的是讓網路工程師能在現今變化迅速的資訊網路環境中，都能掌握和擁有最先進的網路技術，任何時候都能保持領導地位。
問題 #16
Which of the following statements are true regarding IaaS computing instances? (Choose TWO correct answers.)
答案：A,E
解題說明：
Infrastructure as a Service (IaaS) provides on-demand virtual computing resources that can be dynamically created and destroyed. According to cloud computing documentation, IaaS instances are designed to be ephemeral, allowing users to launch instances when needed and terminate them when no longer required. This makes statement A correct.
Additionally, IaaS platforms expose APIs and service interfaces that enable full automation of instance lifecycle management. Instances can be created, modified, and deleted programmatically using scripts, orchestration tools, or cloud SDKs, making statement B correct.
Statement C is incorrect because root disks are often ephemeral unless explicitly configured as persistent volumes. Statement D contradicts the elastic nature of IaaS, and statement E is false because users may have zero, one, or many instances.
Therefore, the correct answers are A and B.
問題 #17
What is the default provider of Vagrant?
答案：E
解題說明：
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
問題 #18
Which directory is used bycloud-initto store status information and configuration information retrieved from external sources?
答案：C
解題說明：
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 ...
問題 #19
Which of the following is true about LXC?
答案：D
解題說明：
LXC (Linux Containers) is acontainer runtimethat uses Linux kernel features such asnamespaces and cgroupsto provide lightweight, isolated environments. According to containerization documentation, LXC allows multiple Linux systems (containers) to run on a single host while sharing the same kernel.
LXC is Linux-specific, uses the Linux kernel directly, and is not a virtual machine manager. Therefore, the correct answer isC.
問題 #20
FILL BLANK
What LXC command starts a new process within a running LXC container? (Specify ONLY the command without any path or parameters.)
答案：
解題說明：
lxc-attach
Explanation
The lxc-attach command allows the user to start a new process within a running LXC container12. It takes the name of the container as an argument and optionally a command to execute inside the container. If no command is specified, it creates a new shell inside the container1. For example, to list all the files in the home directory of a container named myContainer, one can use:
lxc-attach -n myContainer - ls -lh /home
References:
* 1: Executing a command inside a running LXC - Unix & Linux Stack Exchange
問題 #21
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P.S. KaoGuTi在Google Drive上分享了免費的、最新的305-300考試題庫：https://drive.google.com/open?id=1owT2vkiIL9_vpM-odwuBpT8zMXkmonNO