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| Section | Weight | Objectives |
|---|---|---|
| VM Deployment and Provisioning | 12% | - cloud-init - Cloud Management Tools - Vagrant - Packer |
| Container Virtualization | 25% | - Docker - Container Orchestration Platforms - Container Virtualization Concepts - LXC |
| Full Virtualization | 25% | - Virtual Machine Disk Image Management - QEMU - Virtualization Concepts and Theory - Libvirt Virtual Machine Management - Xen |
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NEW QUESTION # 106
FILL BLANK
What LXC command lists containers sorted by their CPU, block I/O or memory consumption? (Specify ONLY the command without any path or parameters.)
Answer:
Explanation:
lxc-top
Explanation
LXD supports the following network interface types for containers: macvlan, bridged, physical, sriov, and ovn1. Macvlan creates a virtual interface on the host that is connected to the same network as the parent interface2. Bridged connects the container to a network bridge that acts as a virtual switch3. Physical attaches the container to a physical network interface on the host2. Ipsec and wifi are not valid network interface types for LXD containers. References:
* 1: Bridge network - Canonical LXD documentation
* 2: How to create a network - Canonical LXD documentation
* 4: LXD containers and networking with static IP - Super User
NEW QUESTION # 107
Which sub-command of xl changes the media inside a virtual CD-ROM drive of a Xen guest domain?
(Specify ONLY the sub-command without any path or parameters.)
Solution:
block-attach - or - xl cd-insert - or - cd-eject - or - xl cd-eject - or - cd-insert - or - xl block-attach - or - block-detach - or - xl block-detach Determine whether the given solution is correct?
Answer: A
Explanation:
According to official Xen xl toolstack documentation, thecorrect sub-commandsused to change media in a virtual CD-ROM drive arecd-insertandcd-eject. These commands are specifically designed for inserting or ejecting ISO media from a Xen guest's virtual CD-ROM device.
While commands such as block-attach and block-detach are valid xl sub-commands, they are used for attaching and detaching block devices in general and arenot specific to CD-ROM media operations. The provided solution lists multiple commands, including incorrect and unrelated ones, rather than specifying the correct sub-command precisely.
Because the solution does not accurately and exclusively identify the correct xl sub-command, it is considered incorrect. Therefore, the correct determination isB.
NEW QUESTION # 108
In order to determine if a virtualization host offers Intel VT-x support, which CPU flag must be searched for in the file /proc/cpuinfo?
Answer:
Explanation:
vmx
Explanation:
Intel VT-x is Intel's hardware-assisted virtualization technology and is required to run hypervisors such as KVMefficiently. According to Linux and KVM documentation, support for Intel VT-x can be verified by checking the CPU flags listed in the /proc/cpuinfo file.
The specific flag that indicates Intel VT-x support isvmx. This flag appears in the flags section for each processor core if VT-x is available and enabled in the system firmware (BIOS or UEFI). The presence of vmx confirms that the CPU supports hardware virtualization extensions required by KVM.
If the flag is absent, virtualization may either be unsupported by the CPU or disabled in the firmware settings.
For AMD processors, a different flag (svm) is used.
Virtualization documentation consistently references the vmx flag as the authoritative indicator for Intel VT-x support. Therefore, the correct and documented answer isvmx.
NEW QUESTION # 109
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)?
Answer: C
Explanation:
Nested page table extensions, such as Intel Extended Page Table (EPT) or AMD Rapid Virtualization Indexing (RVI), are hardware features that facilitate the virtualization of memory. They allow the CPU to perform the translation of guest virtual addresses to host physical addresses in a single step, without the need for software-managed shadow page tables. This reduces the overhead and complexity of memory management for virtual machines, and improves their performance and isolation. Nested page table extensions do not directly affect the virtualization of other hardware components, such as network interfaces, host bus adapters, hard disks, or IO cache.
:
Second Level Address Translation - Wikipedia
c - What is use of extended page table? - Stack Overflow
Hypervisor From Scratch - Part 4: Address Translation Using Extended ...
NEW QUESTION # 110
Which of the following tasks are part of a hypervisor's responsibility? (Choose two.)
Answer: D,E
Explanation:
Explanation
A hypervisor is a software that creates and runs virtual machines (VMs) by separating the operating system and resources from the physical hardware. One of the main tasks of a hypervisor is to map the resources of VMs to the resources of the host system, such as CPU, memory, disk, and network. This allows the hypervisor to allocate and manage the resources among multiple VMs and ensure that they run efficiently and independently123. Another important task of a hypervisor is to isolate the VMs and prevent unauthorized access to resources of other VMs. This ensures the security and privacy of the VMs and their data, as well as the stability and performance of the host system. The hypervisor can use various techniques to isolate the VMs, such as virtual LANs, firewalls, encryption, and access control145.
The other tasks listed are not part of a hypervisor's responsibility, but rather of the guest operating system or the application running inside the VM. A hypervisor does not create filesystems during the installation of new VMs, as this is done by the installer of the guest operating system6. A hypervisor does not provide host-wide unique PIDs to the processes running inside the VMs, as this is done by the kernel of the guest operating system7. A hypervisor does not manage authentication to network services running inside a VM, as this is done by the network service itself or by a directory service such as LDAP or Active Directory8. References: 1 (search for "What is a hypervisor?"), 2 (search for "How does a hypervisor work?"), 3 (search for "The hypervisor gives each virtual machine the resources that have been allocated"), 4 (search for "Benefits ofhypervisors"), 5 (search for "Isolate the virtual machines and prevent unauthorized access"), 6 (search for "Create filesystems during the installation of new virtual machine quest operating systems"), 7 (search for "Provide host-wide unique PIDs to the processes running inside the virtual machines"), 8 (search for "Manage authentication to network services running inside a virtual machine").
NEW QUESTION # 111
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