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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: VM Deployment and Provisioning | 12% | - Vagrant - Packer - cloud-init - Cloud Management Tools |
| Topic 2: Container Virtualization | 25% | - LXC - Docker - Container Virtualization Concepts - Container Orchestration Platforms |
| Topic 3: Full Virtualization | 25% | - Virtual Machine Disk Image Management - QEMU - Xen - Virtualization Concepts and Theory - Libvirt Virtual Machine Management |
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NEW QUESTION # 56
Which container orchestration platform is often associated with automated scaling and load balancing?
Answer: C
Explanation:
Kubernetesis the container orchestration platform most strongly associated withautomated scaling and load balancing. According to container orchestration documentation, Kubernetes provides built-in features such as Horizontal Pod Autoscaling, service-based load balancing, self-healing, and declarative deployment models.
Docker Compose and LXC are not orchestration platforms at scale, and while Amazon ECS supports scaling, Kubernetes is the industry-standard platform most commonly referenced for these capabilities.
Therefore, the correct answer isB.
NEW QUESTION # 57
What is the purpose ofcloud-init?
Answer: D
Explanation:
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 # 58
Which of the following resources can be limited by libvirt for a KVM domain? (Choose two.)
Answer: A,E
Explanation:
Explanation
Libvirt is a toolkit that provides a common API for managing different virtualization technologies, such as KVM, Xen, LXC, and others. Libvirt allows users to configure and control various aspects of a virtual machine (also called a domain), such as its CPU, memory, disk, network, and other resources. Among the resources that can be limited by libvirt for a KVM domain are:
* Amount of CPU time: Libvirt allows users to specify the number of virtual CPUs (vCPUs) that a domain can use, as well as the CPU mode, model, topology, and tuning parameters. Users can also set the CPU shares, quota, and period to control the relative or absolute amount of CPU time that a domain can consume. Additionally, users can pin vCPUs to physical CPUs or NUMA nodes to improve performance and isolation. These settings can be configured in the domain XML file under the <cpu> and <cputune> elements12.
* Size of available memory: Libvirt allows users to specify the amount of memory that a domain can use, as well as the memory backing, tuning, and NUMA node parameters. Users can also set the memory hard and soft limits, swap hard limit, and minimum guarantee to control the memory allocation and reclaim policies for a domain. These settings can be configured in the domain XML file under the <memory>, <memoryBacking>, and <memtune> elements13.
The other resources listed in the question are not directly limited by libvirt for a KVM domain. File systems allowed in the domain are determined by the disk and filesystem devices that are attached to the domain, which can be configured in the domain XML file under the <disk> and <filesystem> elements14. Number of running processes and number of available files are determined by the operating system and the file system of the domain, which are not controlled by libvirt.
References:
* libvirt: Domain XML format
* CPU Allocation
* Memory Allocation
* Hard drives, floppy disks, CDROMs
NEW QUESTION # 59
Which file in acgroupdirectory contains the list of processes belonging to thiscgroup?
Answer: B
Explanation:
The file procs in a cgroup directory contains the list of processes belonging to this cgroup. Each line in the file shows the PID of a process that is a member of the cgroup. A process can be moved to a cgroup by writing its PID into the cgroup's procs file. For example, to move the process with PID 24982 to the cgroup cg1, the following command can be used: echo 24982 > /sys/fs/cgroup/cg1/procs1. The file procs is different from the file tasks, which lists the threads belonging to the cgroup. The file procs can be used to move all threads in a thread group at once, while the file tasks can be used to move individual threads2. References:
* Creating and organizing cgroups cgroup2 - GitHub Pages
* Control Groups - The Linux Kernel documentation
NEW QUESTION # 60
Which of the following KVM parameters is identical to the KVM parameter -hdb file.img?
Answer: B
Explanation:
In QEMU/KVM, the legacy parameter -hdb file.img attaches a disk image as theprimary IDE slave device.
According to QEMU documentation, this corresponds to an IDE device withindex 1, media typedisk, and interfaceIDE.
The modern equivalent using the -drive syntax is:
-drive file=file.img,index=1,media=disk,if=ide
OptionDmatches this mapping precisely. The other options use invalid or unsupported parameter combinations and do not correctly represent the IDE device mapping.
Therefore, the correct answer isD.
NEW QUESTION # 61
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