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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: VM Deployment and Provisioning | 12% | - Cloud Management Tools - Packer - Vagrant - cloud-init |
| Topic 2: Container Virtualization | 25% | - Container Virtualization Concepts - Container Orchestration Platforms - LXC - Docker |
| Topic 3: Full Virtualization | 25% | - Xen - QEMU - Virtualization Concepts and Theory - Libvirt Virtual Machine Management - Virtual Machine Disk Image Management |
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NEW QUESTION # 96
Which directory is used bycloud-initto store status information and configuration information retrieved from external sources?
Answer: A
Explanation:
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 ...
NEW QUESTION # 97
Which CPU flag indicates the hardware virtualization capability on an AMD CPU?
Answer: E
Explanation:
The CPU flag that indicates the hardware virtualization capability on an AMD CPU is SVM. SVM stands for Secure Virtual Machine, and it is a feature of AMD processors that enables the CPU to run virtual machines with hardware assistance. SVM is also known as AMD-V, which is AMD's brand name for its virtualization technology. SVM allows the CPU to support a hypervisor, which is a software layer that creates and manages virtual machines. A hypervisor can run multiple virtual machines on a single physical machine, each with its own operating system and applications. SVM improves the performance and security of virtual machines by allowing the CPU to directly execute privileged instructions and handle memory access, instead of relying on software emulation or binary translation. SVM also provides nested virtualization, which is the ability to run a virtual machine inside another virtual machine. To use SVM, the CPU must support it and the BIOS must enable it. The user can check if the CPU supports SVM by looking for the svm flag in the /proc/cpuinfo file or by using the lscpu command. The user can also use the virt-host-validate command to verify if the CPU and the BIOS are properly configured for hardware virtualization123. References:
* How to check if CPU supports hardware virtualization (VT technology)1
* Processor support - KVM3
* How to Enable Virtualization in BIOS for Intel and AMD4
NEW QUESTION # 98
Which of the following statements about the commandlxc-checkpointis correct?
Answer: E
Explanation:
Explanation
The command lxc-checkpoint is used to checkpoint and restore containers. Checkpointing a container means saving the state of the container, including its memory, processes, file descriptors, and network connections, to a file or a directory. Restoring a container means resuming the container from the saved state, as if it was never stopped. Checkpointing and restoring containers can be useful for various purposes, such as live migration, backup, debugging, or snapshotting. The command lxc-checkpoint has the following syntax:
lxc-checkpoint {-n name} {-D path} [-r] [-s] [-v] [-d] [-F]
The options are:
* -n name: Specify the name of the container to checkpoint or restore.
* -D path: Specify the path to the file or directory where the checkpoint data is dumped or restored.
* -r, --restore: Restore the checkpoint for the container, instead of dumping it. This option is incompatible with -s.
* -s, --stop: Optionally stop the container after dumping. This option is incompatible with -r.
* -v, --verbose: Enable verbose criu logging. Only available when providing -r.
* -d, --daemon: Restore the container in the background (this is the default). Only available when providing -r.
* -F, --foreground: Restore the container in the foreground. Only available when providing -r.
The command lxc-checkpoint uses the CRIU (Checkpoint/Restore In Userspace) tool to perform the checkpoint and restore operations. CRIU is a software that can freeze a running application (or part of it) and checkpoint it to a hard drive as a collection of files. It can then use the files to restore and run the application from the point it was frozen at1.
The other statements about the command lxc-checkpoint are not correct. It does not create a clone or an image of a container, nor does it double the memory consumptionof the container. It can work on both running and stopped containers, depending on the options provided. References:
* Linux Containers - LXC - Manpages - lxc-checkpoint.12
* lxc-checkpoint(1) - Linux manual page - man7.org3
* CRIU4
NEW QUESTION # 99
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: A
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 # 100
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: A
NEW QUESTION # 101
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