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To prepare for the LPIC-3 Exam 305, candidates can take various training courses offered by several institutions, including online courses, classroom training, and self-study materials. Practice exams and study guides are also available to help candidates prepare for the exam. It is essential to have practical experience in deploying and managing virtualization and containerization solutions on Linux systems to pass the exam successfully.
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Virtualization of which hardware component is facilitated by CPUs supporting nested page table extensions, such as Intel Extended Page Table (EPT) or AMD Rapid Virtualization Indexing (RVI)?
A. Host Bus Adapters
B. IO Cache
C. Memory
D. Network Interfaces
E. Hard Disks
Answer: C
NEW QUESTION # 101
What is the purpose ofcloud-init?
A. Prepare the generic image of an laaS instance to fit a specific instance's configuration.
B. Assign an laaS instance to a specific computing node within a cloud.
C. Standardize the configuration of infrastructure services, such as load balancers or virtual firewalls in a cloud.
D. Replace common Linux inic systems, such as systemd or SysV init.
E. Orchestrate the creation and start of multiple related laaS instances.
Answer: A
Explanation:
Cloud-init is a tool that processes configurations and runs through five stages during the initial boot of Linux VMs in a cloud. It allows users to customize a Linux VM as it boots for the first time, by applying user data to the instance. User data can include scripts, commands, packages, files, users, groups, SSH keys, and more.
Cloud-init can also interact with various cloud platforms and services, such as Azure, AWS, OpenStack, and others. The purpose of cloud-init is to prepare the generic image of an laaS instance to fit a specific instance's configuration, such as hostname, network, security, and application settings. References:
* Cloud-init - The standard for customising cloud instances
* Understanding cloud-init - Azure Virtual Machines
* Tutorial - Customize a Linux VM with cloud-init in Azure - Azure Virtual Machines
NEW QUESTION # 102
Which of the following network interface types are valid in an LXD container configuration? (Choose THREE)
A. ipsec
B. macvlan
C. bridged
D. wif
E. physical
Answer: B,C,E
Explanation:
LXD supports several network interface types that define how containers connect to the host and external networks. According to LXD documentation, valid interface types includephysical,bridged, andmacvlan.
Aphysicalinterface allows a container to be directly connected to a host network interface. Abridgedinterface connects the container to a Linux bridge, enabling communication with other containers and external networks.Macvlanassigns a unique MAC address to the container, making it appear as a separate device on the physical network.
Optionswifandipsecare not valid LXD network interface types. Therefore, the correct answers areC, D, and E.
NEW QUESTION # 103
What kind of virtualization is implemented by LXC?
A. CPU emulation
B. Hardware containers
C. System containers
D. Application containers
E. Paravirtualization
Answer: C
Explanation:
Explanation
LXC implements system containers, which are a type of operating-system-level virtualization. System containers allow running multiple isolated Linux systems on a single Linux control host, using a single Linux kernel. System containers share the same kernel with the host and each other, but have their own file system, libraries, andprocesses. System containers are different from application containers, which are designed to run a single application or service in an isolated environment. Application containers are usually smaller and more portable than system containers, but also more dependent on the host kernel and libraries. Hardware containers, CPU emulation, and paravirtualization are not related to LXC, as they are different kinds of virtualization methods that involve hardware abstraction, instruction translation, or modification of the guest operating system. References:
* 1: LXC - Wikipedia
* 2: Linux Virtualization : Linux Containers (lxc) - GeeksforGeeks
* 3: Features - Proxmox Virtual Environment
NEW QUESTION # 104
Which of the following statements are true regarding hardware-based virtualization? (Choose TWO correct answers.)
A. Hardware-based virtualization requires special support in the host system's hardware which is present in recent x86-based computers.
B. Hardware-based virtualization is not available on x86-based CPU architectures and requires special virtualization host hardware.
C. Hardware-based virtualization relies on the host system's processor to call the hypervisor when critical instructions are executed by a virtual machine.
D. Hardware-based virtualization implements a whole machine in software and therefore can run virtual machines of a given hardware platform on an arbitrary host system.
Answer: A,C
Explanation:
Hardware-based virtualization usesCPU-assisted virtualization featuresto improve performance and isolation when running virtual machines. According to virtualization documentation, modern processors such asIntel VT-xandAMD-Vprovide special CPU instructions that allow the processor totrap and transfer control to the hypervisorwhen sensitive or privileged instructions are executed by a guest virtual machine.
This behavior makes statementAcorrect.
Additionally, hardware-based virtualizationrequires explicit CPU and chipset support, which is now standard in most modern x86-based systems. These hardware extensions reduce the need for complex software emulation and enable near-native performance for virtual machines. Therefore, statementCis also correct.
StatementBdescribes full software emulation rather than hardware-assisted virtualization and is incorrect in this context. StatementDis false because hardware-based virtualization is widely available and heavily used on x86 architectures in enterprise, cloud, and desktop environments.
Virtualization notes consistently highlight that hardware-based virtualization is the foundation for platforms such asKVM, Xen, VMware ESXi, and Hyper-V, making it a critical technology in modern computing.
Thus, the correct answers areA and C.
NEW QUESTION # 105
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