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Total 55 questions
Which of the following values are valid in the firmware attribute of a <os> element in a libvirt domain definition? (Choose two.)
- A. scsi
- B. virtio
- C. efi
- D. bios
- E. pcie
Answer : CD
Which statement is true regarding the Linux kernel module that must be loaded in order to use QEMU with hardware virtualization extensions?
- A. It must be loaded into the kernel of the host system only if the console of a virtual machine will be connected to a physical console of the host system.
- B. It must be loaded into the kernel of each virtual machine that will access files and directories from the host system’s file system.
- C. It must be loaded into the kernel of the host system in order to use the virtualization extensions of the host system’s CPU.
- D. It must be loaded into the kernel of the first virtual machine, as it interacts with the QEMU bare metal hypervisor and is required to trigger the start of additional virtual machines.
- E. It must be loaded into the kernel of each virtual machine to provide paravirtualization which is required by QEMU.
Answer : C
Which of the following mechanisms are used by LXC and Docker to create containers? (Choose three.)
- A. Linux Capabilities
- B. Kernel Namespaces
- C. Control Groups
- D. POSIXACLs
- E. File System Permissions
Answer : ABC
Which file format is used by libvirt to store configuration data?
- A. INI-style text files
- B. SQLite databases
- C. XML files
- D. Java-like .properties files
- E. Text files containing key/value pairs
Answer : C
Which of the following statements is true regarding the following output of xl list:
- A. Both Debian and Ubuntu require xl commands to start running.
- B. The domain with ID 2 uses paravirtualization.
- C. CentOS is the domain which has consumed the most CPU time.
- D. Ubuntu is idle or waiting for I/O.
- E. It is necessary to use the xl command to change Ubuntu’s state to running.
Answer : D
What is true about containerd?
- A. It is a text file format defining the build process of containers.
- B. It runs in each Docker container and provides DHCP client functionality.
- C. It uses runc to start containers on a container host.
- D. It is the initial process run at the start of any Docker container.
- E. It requires the Docker engine and Docker CLI to be installed.
Answer : C
Which of the following resources can be limited by libvirt for a KVM domain? (Choose two.)
- A. Amount of CPU time
- B. Size of available memory
- C. File systems allowed in the domain
- D. Number of running processes
- E. Number of available files
Answer : AB
Virtualization of which hardware component is facilitated by CPUs supporting nested page table extensions, such as Intel Extended Page Table (EPT) or AMD Rapid Virtualization Indexing (RVI)?
- A. Memory
- B. Network Interfaces
- C. Host Bus Adapters
- D. Hard Disks
- E. IO Cache
Answer : A
If a Dockerfile contains the following lines:
WORKDIR /
RUN cd /tmp -
RUN echo test > test -
where is the file test located?
- A. /tmp/test within the container image.
- B. /root/test within the container image.
- C. /test within the container image.
- D. /tmp/test on the system running docker build.
- E. test in the directory holding the Dockerfile.
Answer : C
Which of the following commands boots a QEMU virtual machine using hardware virtualization extensions?
- A. qvirt -create -drive file=debian.img -cdrom debian.iso -m 1024 -boot d -driver hvm
- B. vm -kvm -drive file=debian.img -cdrom debian.iso -m 1024 -boot d
- C. qemu-hw -create -drive file=debian.img -cdrom debian.iso -m 1024 -boot d
- D. qemu -accel kvm -drive file-debian.img -cdrom debian.iso -m 1024 -boot d
- E. qvm start -vmx -drive file=debian.img -cdrom debian.iso -m 1024 -boot d
Answer : D
Which of the following tasks are part of a hypervisor’s responsibility? (Choose two.)
- A. Create filesystems during the installation of new virtual machine guest operating systems.
- B. Provide host-wide unique PIDs to the processes running inside the virtual machines in order to ease inter-process communication between virtual machines.
- C. Map the resources of virtual machines to the resources of the host system.
- D. Manage authentication to network services running inside a virtual machine.
- E. Isolate the virtual machines and prevent unauthorized access to resources of other virtual machines.
Answer : CE
Which of the following devices exist by default in an LXC container? (Choose three.)
- A. /dev/log
- B. /dev/console
- C. /dev/urandom
- D. /dev/kmem
- E. /dev/root
Answer : ABC
Which of the following services can QEMU provide in a user network? (Choose three.)
- A. DHCP
- B. BGP
- C. CIFS
- D. AppleTalk
- E. TFTP
Answer : ACE
Which of the following statements are true regarding VirtualBox?
- A. It is a hypervisor designed as a special kernel that is booted before the first regular operating system starts.
- B. It only supports Linux as a guest operating system and cannot run Windows inside a virtual machine.
- C. It requires dedicated shared storage, as it cannot store virtual machine disk images locally on block devices of the virtualization host.
- D. It provides both a graphical user interface and command line tools to administer virtual machines.
- E. It is available for Linux only and requires the source code of the currently running Linux kernel to be available.
Answer : D
Which of the following commands moves the libvirt domain web1 from the current host system to the host system host2?
- A. virsh node-update host1=-dom:web1 host2=+dom:web1
- B. virsh pool-add host2 web1
- C. virsh migrate web1 qemu+ssh://host2/system
- D. virsh patch web1 .Domain.Node=host2
- E. virsh cp .:web1 host2:web1
Answer : C
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