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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: VM Deployment and Provisioning | 10% | - Cloud Init
|
| Topic 2: Container Virtualization | 25% | - LXC
|
| Topic 3: Full Virtualization | 25% | - Virtualization Concepts and Theory
|
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NEW QUESTION # 87
Which command in the KVM monitor restores a snapshot?
Answer:
Explanation:
loadvm
Explanation:
In KVM and QEMU-based virtualization environments, the QEMU monitor provides an interactive interface for managing virtual machine runtime operations. According to KVM documentation, the command used to restore a previously saved snapshot within the monitor is loadvm.
Snapshots capture the state of a virtual machine at a specific point in time, including CPU state, memory, and disk state (depending on configuration). The loadvm command allows administrators to revert a virtual machine back to that saved state, which is especially useful for testing, debugging, and recovery scenarios.
This command is typically used in conjunction with the savevm command, which creates snapshots. The functionality is supported primarily with disk formats such as QCOW2, which allow snapshot capabilities.
Therefore, the correct and documented command is loadvm.
NEW QUESTION # 88
In which scenarios would Vagrant be most beneficial for developers?
Answer: A
Explanation:
Vagrant is a tool designed to simplify the creation and management ofreproducible development environments. According to virtualization and containerization documentation, Vagrant is most beneficial whendeveloping and testing applications locally. It allows developers to define virtual machine configurations using a declarative configuration file, ensuring consistent environments across development teams.
Vagrant integrates with virtualization providers such as VirtualBox, KVM, and VMware, enabling developers to spin up lightweight, disposable virtual machines that closely mirror production environments. This reduces the common "works on my machine" problem by standardizing development setups.
Vagrant is not intended for managing network infrastructure, large-scale production environments, or direct cloud deployments. While it can interface with cloud providers, its primary use case remainslocal development and testing, not production operations.
Virtualization notes emphasize that Vagrant is a developer-focused tool that complements infrastructure automation tools rather than replacing them. Therefore, optionDaccurately reflects Vagrant's most appropriate and documented use case.
NEW QUESTION # 89
Which of the following statements are true for full virtualization? (Choose TWO correct answers)
Answer: B,E
Explanation:
Full virtualization is a virtualization approach where the hypervisor provides a complete simulation of the underlying hardware, allowingunmodified guest operating systemsto run without awareness of virtualization. Virtualization documentation consistently states that one of the defining characteristics of full virtualization is thatguest operating systems do not need to be modified, making optionCcorrect.
Additionally, modern full virtualization platforms benefit fromhardware-assisted virtualization, such as Intel VT-x and AMD-V CPU extensions. These extensions significantly improve performance by offloading virtualization tasks to the processor, making optionBcorrect.
Option A is incorrect because Linux-based hypervisors like KVM can perform full virtualization entirely within the Linux ecosystem. Option D is false because all virtualization introduces some performance overhead, even if minimal. Option E is incorrect because full virtualization is widely used in production environments, including enterprise data centers and cloud platforms.
Therefore, based on virtualization principles and documentation, the correct answers areB and C.
NEW QUESTION # 90
Which functionality is provided by Vagrant as well as by Docker? (Choose three.)
Answer: A,C,E
Explanation:
* Both Vagrant and Docker can share directories from the host file system to a guest. This allows the guest to access files and folders from the host without copying them. Vagrant uses the config.vm.synced_folder option in the Vagrantfile to specify the shared folders1. Docker uses the -v or --volume flag in the docker run command to mount a host directory as a data volume in the container2.
* Both Vagrant and Docker can download required base images. Base images are the starting point for creating a guest environment. Vagrant uses the config.vm.box option in the Vagrantfile to specify the base image to use1. Docker uses the FROM instruction in the Dockerfile to specify the base image to use2. Both Vagrant and Docker can download base images from public repositories or local sources.
* Both Vagrant and Docker can apply changes to a base image. Changes are modifications or additions to the base image that customize the guest environment. Vagrant uses provisioners to run scripts or commands on the guest after it is booted1. Docker uses instructions in the Dockerfile to execute commands on the baseimage and create a new image2. Both Vagrant and Docker can save the changes to a new image or discard them after the guest is destroyed.
* Vagrant and Docker differ in how they start system images. Vagrant starts system images as virtual machines by default, using a provider such as VirtualBox, VMware, or Hyper-V1. Docker starts system images as containers by default, using the native containerization functionality on macOS, Linux, and Windows2. Containers are generally more lightweight and faster than virtual machines, but less secure and flexible. References: 1: Vagrant vs. Docker | Vagrant | HashiCorp Developer 2: Vagrant vs Docker:
Which Is Right for You? (Could Be Both) - Kinsta Web Development Tools
NEW QUESTION # 91
Which of the following statements are true regarding a Pod in Kubernetes? (Choose two.)
Answer: A,B
Explanation:
A Pod in Kubernetes is a collection of one or more containers that share the same network and storage resources, and a specification for how to run the containers. A Pod is the smallest unit of workload Kubernetes can run, meaning that it cannot be divided into smaller units. Therefore, option C is correct. All containers of a Pod run on the same node, which is the smallest unit of computing hardware in Kubernetes. A node is a physical or virtual machine that hosts one or more Pods. Therefore, option A is also correct. Pods are not always created automatically and cannot be explicitly configured. Pods can be created manually using YAML or JSON files, or using commands like kubectl run or kubectl create. Pods can also be created automatically by higher-level controllers, such as Deployment, ReplicaSet, or StatefulSet. Therefore, option B is incorrect. When a Pod fails, Kubernetes does not restart the Pod on another node by default. Pods are ephemeral by nature, meaning that they can be terminated or deleted at any time. If a Pod is managed by a controller, the controller will create a new Pod to replace the failed one, but it may not be on the same node.
Therefore, option D is incorrect. systemd is not used to manage individual Pods on the Kubernetes nodes.
systemd is a system and service manager for Linux operating systems that can start and stop services, such as docker or kubelet. However, systemd does not interact with Pods directly. Pods are managed by the kubelet service, which is an agent that runs on each node and communicates with the Kubernetes control plane.
Therefore, option E is incorrect. References:
* Pods | Kubernetes
* What is a Kubernetes pod? - Red Hat
* What's the difference between a pod, a cluster, and a container?
* What are Kubernetes Pods? | VMware Glossary
* Kubernetes Node Vs. Pod Vs.Cluster: Key Differences - CloudZero
NEW QUESTION # 92
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