304-200

304-200 practice questions, page 5 of 5, with answer review and explanations.

Question 21

SIMULATION - 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.)

Question 22

When preparing a public machine image for the provisioning of new cloud computing instances, which of the following steps should be done? (Choose TWO correct answers.)

  1. Remove all default users and groups, including root and nobody.
  2. Remove all configuration files from /etc/ that were not manually modified.
  3. Remove all confidential data from the image.
  4. Remove all remote login services (i.e. SSH) from the image.
  5. Remove all private SSH keys from the image.

Question 23

What is the usual way to gain command line access to computing instances in an IaaS cloud?

  1. By providing a public SSH key to the cloud management system and using the matching private SSH key to log into the instances.
  2. Usually computing instances are accessed through a web frontend and do not allow command line access.
  3. By either telnet or SSH using the credentials of the cloud management system account with administrative privileges.
  4. By using a telnet session with the credentials set and publicized by the creator of the computing instance's system image.
  5. By using a VNC console which does not require authentication when it is invoked via the cloud management system.

Question 24

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

  1. SVM
  2. VIRT
  3. VMX
  4. PVM
  5. HVM

Question 25

Which of the following tasks are parts of a hypervisor'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.