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NEW QUESTION # 68
Which of the following statements are true about sparse images in the context of virtual machine storage?
(Choose two.)
Answer: A,B
Explanation:
Explanation
Sparse images are a type of virtual disk images that grow in size as data is written to them, but do not shrink when data is deleted from them. Sparse images may consume an amount of space different from their nominal size, which is the maximum size that the image can grow to. For example, a sparse image with a nominal size of 100 GB may only take up 20 GB of physical storage if only 20 GB of data is written to it. Sparse images allocate backend storage at the first usage of a block, which means that the physical storage is only used when the virtual machine actually writes data to a block. This can save storage space and improve performance, as the image does not need to be pre-allocated or zeroed out.
Sparse images are not automatically shrunk when files within the image are deleted, because the virtual machine does not inform the host system about the freed blocks. To reclaim the unused space, a special tool such as virt-sparsify1 or qemu-img2 must be used to compact the image. Sparse images can be used with both full virtualization and paravirtualization, as the type of virtualization does not affect the format of the disk image. Sparse images are not automatically resized when their maximum capacity is about to be exceeded, because this would require changing the partition table and the filesystem of the image, which is not a trivial task. To resize a sparse image, a tool such as virt-resize3 or qemu-img2 must be used to increase the nominal size and the filesystem size of the image. References: 1 (search for "virt-sparsify"), 2 (search for
"qemu-img"), 3 (search for "virt-resize").
NEW QUESTION # 69
Which of the following commands are needed to establish a private network between two (or more) KVM virtual machines that is not visible to other KVM instances on the same KVM host? (Choose THREE correct answers.)
Answer: B,D,E
Explanation:
To establish aprivate, isolated networkbetween KVM virtual machines on the same host, Linux networking tools are used to create and managevirtual network bridges and TAP interfaces. According to KVM and Linux virtualization documentation, the core components required arebrctl,tunctl, andifconfig(or the modern ip command).
Thebrctlutility is used to create and manage Linux bridge interfaces, which act as virtual switches connecting multiple virtual machines.tunctlis used to create TAP interfaces that allow virtual machines to connect to the bridge.ifconfigis used to bring interfaces up and assign network parameters.
ebtablesis not strictly required for creating a private network; it is used for filtering Ethernet frames.ipconfig is a Windows networking command and is not applicable to Linux systems.
Therefore, the correct and documented answers areB, D, and E.
NEW QUESTION # 70
Which of the following commands deletes all volumes which are not associated with a container?
Answer: A
NEW QUESTION # 71
A clone of a previously used virtual machine should be created. All VM specific information, such as user accounts, shell histories and SSH host keys should be removed from the cloned disk image. Which of the following tools can perform these tasks?
Answer: C
Explanation:
Sysprep is a tool that removes all your personal account and security information, and then prepares the machine to be used as an image. It is supported by Windows and some Linux distributions. It can also remove drivers and other machine-specific settings. Sysprep is required when creating a managed image outside of a gallery in Azure
https://learn.microsoft.com/en-us/azure/virtual-machines/generalize
NEW QUESTION # 72
Which of the following statements are true regarding VirtualBox?
Answer: D
Explanation:
Explanation
VirtualBox is a hosted hypervisor, which means it runs as an application on top of an existing operating system, not as a special kernel that is booted before the first regular operating system starts1. VirtualBox supports a large number of guest operating systems, including Windows, Linux, Solaris, OS/2, and OpenBSD1. VirtualBox does not require dedicated shared storage, as it can store virtual machine disk images locally on block devices of the virtualization host, or on network shares, or on iSCSI targets1. VirtualBox provides both a graphical user interface (GUI) and command line tools (VBoxManage) to administer virtual machines1. VirtualBox is available for Windows, Linux, macOS, and Solaris hosts1, and does not require the source code of the currently running Linux kernel to be available. References:
* Oracle VM VirtualBox: Features Overview
NEW QUESTION # 73
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