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LPI Level 3 Exam 304

Question No: 1 – (Topic 1)

Which of the following is true regarding the CPU of a KVM virtual machine? (Choose TWO correct answers.)

  1. Each KVM virtual machine can only have one CPU with one core.

  2. KVM virtual machines support multiple virtual CPUs in order to run SMP systems.

  3. The CPU architecture of a KVM virtual machine is independent of the host system#39;s architecture.

  4. For each KVM virtual machine one dedicated physical CPU core must be reserved.

  5. KVM uses the concept of virtual CPUs to map the virtual machines to physical CPUs.

Answer: B,E

Question No: 2 – (Topic 1)

Which of the following tasksare partsof a hypervisor#39;s responsibility? (Choose TWO correct answers.)

  1. Create filesystems during the installation of new VM guest operating systems.

  2. Provide host-wide unique PIDs to the processes running inside the VMs in order to ease interprocess communication between virtual machines.

  3. Map the resources of virtual machines to the resources of the host system.

  4. Ensure isolation and eliminate any interference between virtual machines.

  5. Manage authentication to network services running inside a virtual machine.

Answer: C,D

Question No: 3 – (Topic 1)

Which of the following KVM monitor commands changes the image file in the first IDE CDROM drive of a virtual machine?

  1. change ide1-cd0 /tmp/linux.iso

  2. update ide1-cd0 /tmp/linux.iso

  3. set ide1-cd0=/tmp/linux.iso

  4. eject -reconnect ide1-cd0 /tmp/linux.iso

  5. disc file=/tmp/linux.iso,device=/dev/sr0

Answer: A

Question No: 4 CORRECT TEXT – (Topic 1)

Which subcommand of virsh opens the XML configuration of a virtual network in an editor in order to make changes to that configuration? (Specify ONLY the subcommand without any parameters.)

Answer: virsh net-edit, net-edit

Question No: 5 CORRECT TEXT – (Topic 1)

In the command

vzctl 105 /usr/bin/apt-get install wget

which subcommand of vzctl is missing in order to install wget in the OpenVZ container 105?

Answer: exec, exec2

Question No: 6 – (Topic 1)

Which command within virsh lists the virtual machines that are available on the current host?

  1. view

  2. show

  3. list-vm

  4. list

  5. list-all

Answer: D

Question No: 7 – (Topic 1)

Which of the following statements is true regarding the following output of xl list:

Name ID Mem VCPUs State Time(s) Domain-0 0 384 1 r 498.7

Debian 2 305 1 -p– 783.5

Slack 6 64 1 -b 313.6

CentOS 7 512 2 r 455.1

  1. It is necessary to use the xl command to change Slack#39;s state to running.

  2. CentOS is the domain which has consumed the most CPU time.

  3. The domain with ID 2 uses paravirtualization.

  4. Both Debian and Slack require xl commands to start running.

  5. Slack is idle or waiting for I/O.

Answer: E

Question No: 8 CORRECT TEXT – (Topic 1)

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? (Specify the name of the CPU flag as it is mentioned in the given file only without any additional information.)

Answer: vmx, VMX

Question No: 9 – (Topic 1)

Which CPU flag indicates the hardware virtualization capability on an AMD CPU?

  1. SVM

  2. VIRT

  3. VMX

  4. PVM

  5. HVM

Answer: A

Question No: 10 – (Topic 1)

Which of the following statements are true for full virtualization? (Choose TWO correct answers.)

  1. Full virtualization does not require changes to the guest operating systems.

  2. Full virtualization has no performance impact compared to a non-virtualized bare-metal installation on the same machine.

  3. Full virtualization has a severe performance impact and should not be used in production environments.

  4. Full virtualization may be supported by special CPU extensions that provide better performance.

  5. Full virtualization always requires additional software components and cannot be done using Linux only.

Answer: A,D

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