Secreto 305 part 2

What is the name of the kernel module that is required to be loaded in order to use KVM on an Intel CPU architecture? (Specify ONLY the module name without any path information and with or without the module suffix.) Solution: kvm-intel.ko – or – kvm-intel – or – kvm_intel.ko – or – kvm_intel Determine whether the given solution is correct?. Correct. Incorrect.

What is the default path to the Docker daemon configuration file on Linux? (Specify the full name of the file, Including path.).

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?.

Which of the following values are valid in thefirmwareattribute of a<os>element in a libvirt domain definition?(Choose two.). scsi. virtio. efi. bios. pcie.

What LXC command starts a new process within a running LXC container? (Specify ONLY the command without any path or parameters.).

Which of the following statements are true regarding hardware-based virtualization? (Choose TWO correct answers.). Hardware-based virtualization relies on the host system's processor to call the hypervisor when critical instructions are executed by a virtual machine. Hardware-based virtualization implements a whole machine in software and therefore can run virtual machines of a given hardware platform on an arbitrary host system. Hardware-based virtualization requires special support in the host system's hardware which is present in recent x86-based computers. Hardware-based virtualization is not available on x86-based CPU architectures and requires special virtualization host hardware.

Which of the following restrictions is true when using KVM with User Networking?. Virtual machines can communicate with the host system and with other virtual machines using User Networking. Virtual machines can only communicate with other virtual machines but not with the host system. Virtual machines cannot use ICMP. Virtual machines are restricted to only use IPv6 and not IPv4.

Which of the following values are valid in the type attribute of a<domain>element in a libvirt domain definition? (Choose two.). proc. namespace. kvm. cgroup. Ixc.

What is libvirt?. A virtualization management API. A Linux distribution. A virtualization technology. A hardware virtualization platform.

Which command within virsh lists the virtual machines that are available on the current host?. list-all. list. list-vm. show. view.

If aDockerfilecontains the following lines: WORKDIR / RUN cd /tmp RUN echo test > test where is the filetestlocated?. /ting/test within the container image. /root/tesc within the container image. /test within the container image. /tmp/test on the system running docker build. test in the directory holding the Dockerf ile.

The commandvirsh vol-list vmsreturns the following error: error: failed to get pool 'vms' error: Storage pool not found: no storage pool with matching name 'vms ' Given that the directory/vmsexists, which of the following commands resolves this issue?. dd if=/dev/zero of=/vms bs=1 count=0 flags=name:vms. libvirt-poolctl new –-name=/vms –-type=dir –-path=/vms. qemu-img pool vms:/vms. virsh pool-create-as vms dir --target /vms. touch /vms/.libvirtpool.

Which of the following is a benefit of virtualization?. All of the above. Improved security. Decreased resource utilization. Simplified hardware management.

What are the key benefits of using cloud management tools?. Streamlined billing and invoicing. Automated scaling of virtual machines. Efficient resource allocation. Enhanced security through encryption.

Which of the following commands boots a QEMU virtual machine using hardware virtualization extensions?. qvirt -create -drive file=debian.img -cdrom debian.iso -m 1024 -boot d -driver hvm. vm -kvm -drive file=debian.img -cdrom debian.iso -m 1024 -boot d. qemu-hw -create -drive file=debian.img -cdrom debian.iso -m 1024 -boot d. qemu -accel kvm -drive file-debian.img -cdrom debian.iso -m 1024 -boot d. qvm start -vmx -drive file=debian.img -cdrom debian.iso -m 1024 -boot d.

Which of the following statements are true regarding VirtualBox?. It is a hypervisor designed as a special kernel that is booted before the first regular operating system starts. It only supports Linux as a guest operating system and cannot run Windows inside a virtual machine. It requires dedicated shared storage, as it cannot store virtual machine disk images locally on block devices of the virtualization host. It provides both a graphical user interface and command line tools to administer virtual machines. It is available for Linux only and requires the source code of the currently running Linux kernel to be available.

Which of the following tasks are part of a hypervisor’s responsibility? (Choose two.). Create filesystems during the installation of new virtual machine quest operating systems. Provide host-wide unique PIDs to the processes running inside the virtual machines in order to ease inter-process communication between virtual machines. Map the resources of virtual machines to the resources of the host system. Manage authentication to network services running inside a virtual machine. Isolate the virtual machines and prevent unauthorized access to resources of other virtual machines.

What is the default provider of Vagrant?. lxc. hyperv. virtualbox. vmware_workstation. docker.

What is QEMU primarily used for?. Managing virtual machines. Monitoring virtualized environments. Creating virtual disk images. Emulating hardware to run virtual machines.

Which of the following tools is used to interact with XenStore?. xendo. oxs. xstore. xentore-ls. xl store.

Which of the following statements about the commandlxc-checkpointis correct?. It creates a clone of a container. It doubles the memory consumption of the container. It only works on stopped containers. It writes the status of the container to a file. It creates a container image based on an existing container.

Which functionality is provided by Vagrant as well as by Docker? (Choose three.). Both can share directories from the host file system to a guest. Both start system images as containers instead of virtual machines by default. Both can download required base images. Both can apply changes to a base image. Both start system images as virtual machines instead of containers bv default.

What is the same of the global configuration file for the xl tool stack?.

In which scenarios would Vagrant be most beneficial for developers?. When managing network infrastructure. When deploying applications to the cloud. When working on large-scale production environments. When developing and testing applications locally.

Ifdocker stackis to be used to run a Docker Compose file on a Docker Swarm, how are the images referenced in the Docker Compose configuration made available on the Swarm nodes?. docker stack builds the images locally and copies them to only those Swarm nodes which run the service. docker stack passes the images to the Swarm master which distributes the images to all other Swarm nodes. docker stack instructs the Swarm nodes to pull the images from a registry, although it does not upload the images to the registry. docker stack transfers the image from its local Docker cache to each Swarm node. docker stack triggers the build process for the images on all nodes of the Swarm.

What is the primary purpose of Vagrant’s “Vagrantfile” configuration file?. To define the virtual machine’s hardware requirements. To provide a list of available software packages. To specify the developer’s name and contact information. To specify cloud provider details.

Which of the following is true about LXC?. It is only compatible with Windows. It does not use the Linux kernel. It is a container runtime. It is primarily used for virtual machine management.

What happens when the following command is executed twice in succession? docker run -tid -v data:/data debian bash. The container resulting from the second invocation can only read the content of /data/ and cannot change it. Each container is equipped with its own independent data volume, available at /data/ in the respective container. Both containers share the contents of the data volume, have full permissions to alter its content and mutually see their respective changes. The original content of the container image data is available in both containers, although changes stay local within each container. The second command invocation fails with an error stating that the volume data is already associated with a running container.

What is Xen's role in paravirtualization?. None of the above. Requires modified guest operating systems for improved performance. It only supports fully virtualized guests. It fully virtualizes hardware.

What is the purpose of a .dockerignore file?. It lists files existing in a Docker image which should be excluded when building a derivative image. It specifies files that Docker does not submit to the Docker daemon when building a Docker image. It exists in the root file system of containers that should ignore volumes and ports provided by Docker. It must be placed in the top level directory of volumes that Docker should never attach automatically to a container. It specifies which parts of a Dockerfile should be ignored when building a Docker image.

Which of the following statements are true for full virtualization? (Choose TWO correct answers). Full virtualization always requires additional software components and cannot be done using Linux only. Full virtualization may be supported by special CPU extensions that provide better performance. Full virtualization does not require changes to the guest operating systems. Full virtualization has no performance impact compared to a non-virtualized bare-metal installation on the same machine. Full virtualization has a severe performance impact and should not be used in production environments.

How can data be shared between several virtual machines running on the same Linux-based host system?. By writing data to the file system since all virtual machines on the same host system use the same file system. By mounting other virtual machines' file systems from /dev/virt-disks/remote/. By setting up a ramdisk in one virtual machine and mounting it using its UUID in the other VMs. By using a network file system or file transfer protocol. By attaching the same virtual hard disk to all virtual machines and activating EXT4 sharing extensions on it.

Which of the following tasks is performed by Vagrant?. It automates the installation of a virtual machine according to a configuration file describing the desired VM. It monitors the functionality of a virtual machine and restarts the VM in case of failure. It is a programming interface used to create reports from collected performance data. It is a hypervisor optimized for embedded ARM systems. It migrates virtual machines automatically between host systems.

Xen is a: Type 2 hypervisor. Type 1 hypervisor. Application virtualization platform. Virtualization management tool.

What is the purpose of capabilities in the context of container virtualization?. Map potentially dangerous system calls to an emulation layer provided by the container virtualization. Restrict the disk space a container can consume. Enable memory deduplication to cache files which exist in multiple containers. Allow regular users to start containers with elevated permissions. Prevent processes from performing actions which might infringe the container.

What are some benefits of using Packer for image building? (Select all that apply). Built-in monitoring and logging. Improved security through automated patching. Faster provisioning of virtual machines. Consistency in machine images across different environments.

What is cloud-init?. A configuration tool for customizing cloud instances. A containerization tool. A cloud management tool. A virtualization platform.

What types of cloud-init data sources can be used to configure cloud instances? (Select all that apply). Cloud-based configuration management tools. Metadata service. QR codes. User data scripts.

Which container orchestration platform is often associated with automated scaling and load balancing?. Docker Compose. Kubernetes. Amazon ECS. LXC.

What is true aboutcontainerd?. It is a text file format defining the build process of containers. It runs in each Docker container and provides DHCP client functionality. It uses rune to start containers on a container host. It is the initial process run at the start of any Docker container. It requires the Docker engine and Docker CLI to be installed.

Which of the following statements are true regarding emulation? (Choose TWO). Emulation allows operating systems to be run on foreign architectures. Emulation can only provide distinct hardware components but no complete virtual machines. Emulation implements a whole computing system in software. Emulation requires changes to the guest operating system.

What is Docker Hub?. A Linux distribution. A container image registry. A container orchestration platform. A container runtime.

Which of the following KVM parameters is identical to the KVM parameter -hdb file.img?. -drive bus=ide1,type=slave,image=file.img. -drive type=loop,src=file.img,dst=disk:hdb. -drive image=file.img,if=ide,device=hdb. -drive file=file.img,index=1,media=disk,if=ide. -drive bus=hd,busid=b,src=file.img.

How do containers share the host OS kernel?. Containers have their own full OS. Containers share the kernel but run isolated user spaces. Containers run directly on the host kernel. Containers do not use a kernel.

Which of the following statements are true regarding a Pod in Kubernetes? (Choose two.). All containers of a Pod run on the same node. Pods are always created automatically and cannot be explicitly configured. A Pod is the smallest unit of workload Kubernetes can run. When a Pod fails, Kubernetes restarts the Pod on another node by default. systemd is used to manage individual Pods on the Kubernetes nodes.

Which cloud management tools are known for their infrastructure-as-code (IaC) approach? (Select all that apply). Puppet. Terraform. AWS CloudFormation. Ansible.

Which utility is used to create and manage virtual machine disk images in Linux?. Disk utility. VirtualBox Manager. Libvirt Disk Manager. qemu-img.

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?. Correct. Incorrect.

After creating a new Docker network using the following command: docker network create --driver bridge isolated_nw which parameter must be added todocker createin order to attach a container to the network?. --eth0=isolated_nw. --alias=isolated_nw. --ethernet=isolated_nw. --network=isolated_nw. --attach=isolated_nw.

Which command was used in Xen 3.x as a predecessor of the xl command?.

What is oVirt?. An extension to the Linux Kernel used to provide container virtualization similar to LXC and OpenVZ. A comprehensive management infrastructure for Linux-based virtualization. An approach used to eliminate the need for virtualization called Zero-Virt. A Linux-based hypervisor similar to KVM and Xen. A library that provides access to several different virtualization technologies in a common manner.

Which of the following components are essential in Docker architecture? (Select all that apply). Docker Client. Docker Compose. Docker Daemon. Docker Registry.

What is a container image?. A physical server. A lightweight virtual machine. A snapshot of an application and its dependencies. An operating system kernel.

Which of the following are benefits of virtualization?. Improved hardware utilization. Reduced software compatibility issues. Increased security. Simplified backup and recovery.

Which command within virsh lists the virtual machines that are running on the current host?. I view. list-vm. list. show. list-all.

Which of the following are container orchestration platforms?. Docker Compose. Docker Swarm. LXC. Kubernetes.

Which of the following commands lists all differences between the disk images vm1-snap.img and vm1.img?. virt-delta -a vm1-snap.img -A vm1.img. virt-cp-in -a vm1-snap.img -A vm1.img. virt-cmp -a vm1-snap.img -A vm1.img. virt-history -a vm1-snap.img -A vm1.img. virt-diff -a vm1-snap.img -A vm1.img.

What LXC command lists containers sorted by their CPU, block I/O or memory consumption? (Specify ONLY the command without any path or parameters.).

Which sub-command of xl lists the block devices they are currently attached to a Xen guest domain?.