304-150 Online Practice Questions and Answers

Which file in /proc should an administrator check to determine if full virtualization is supported on a system? (Provide only the file name, with no path information) Your Response:

Which one of the following statements is true about the live migration feature of Xen?

A. It requires that the source and destination hosts have access, with same rights, to the device that exports the virtual machine file system.

B. It is used to migrate the file system of virtual machines between two hosts on the same network segment, ensuring data integrity during the migration process.

C. It is recommended that the virtual machines be restarted after migration to ensure that network settings will be updated.

D. It requires that the virtual machines are turned off to ensure that data stored in the RAM of the virtual machine will not be lost during the migration.

E. It is used to convert physical servers into virtual machines without having to stop the physical servers.

Which solution is needed to make several servers in a network appear as one server?

A. pacemaker

B. heartbeat

C. drbd

D. lvs

E. clvm

What is the main technical advantage that will be available on a server after installing virtualization technologies such as Xen or KVM?

A. The execution time of processes which use the CPU intensively will be reduced.

B. The computing power of the server will be increased.

C. The number of running kernel instances will be limited to one.

D. It will be possible to share physical resources between insulated execution environments.

E. It will be possible to create virtual networks.

Which command will show the status of the initial full synchronization when using DRBD?

A. cat /proc/sys/fs/status

B. cat /proc/drbd/status

C. cat /proc/drbd/currentstatus

D. cat /proc/drbd

E. cat /proc/fs/drdb

With KVM, when using VNC as graphical output, how can the absolute positioning of the mouse pointer be assured?

A. It cannot be assured. There are always two mouse pointers in VNC; the real pointer and the virtual pointer.

B. Using the mouse absolute option

C. No additional option is required; this works out of the box.

D. Using the usb usbdevice tablet options

E. Using the vnc altgrab options

Which command should be used to make a backup of the current state and configuration of a Pacemaker cluster?

A. cibadmin Q > backup.xml

B. crm_mon vvv > backup.xml

C. cibadmin V > backup.xml

D. crm_backup

E. cibadmin E force > backup.xml

Which one of the following should NOT be used as a lowlevel device for DRBD?

A. A LVM logical volume

B. A physical hard disk

C. A EVMS volume

D. A loop device

Which of the following configuration settings specify that keepalived is to use the round robin algorithm?

A. lb_mode rr

B. lb_algo rr

C. loadbalancer_mode=rr

D. algorithm=round robin

E. lb_algorithm=rr

Which one of the following options represent a valid declaration of a backend server with HAProxy?

A. host server_x 10.1.0.1:80 cookie server_x

B. backend server_x 10.1.0.1:80

C. server server_x 10.1.0.1:80 check

D. pool server_x 10.1.0.1:80

Xen was correctly installed, configured and initialized. Some virtual machines have been successfully started, and after that, the xend daemon has been stopped by issuing the command /etc/init.d/xend stop. In this scenario, what is the impact of stopping the xend daemon?

A. Virtual machines will not start automatically on the next boot.

B. All of the running virtual machines will be turned off.

C. The xm command will stop working.

D. The Domain0 will halt.

E. The hypervisor will be stopped.

Which configuration setting ultimately determines which server will be the MASTER with keep alived?

A. advert_int

B. state

C. type

D. priority

Which option to the xm command will deactivate a live Xen virtual machine? (Select TWO correct answers)

A. destroy

B. remove

C. shutdown

D. stop

E. halt

With IPVS, if this sysctl variable is set to 0, the load balancer will silently drop packets when its destination server is not available. If this variable is enabled, the load balancer will expire the connection immediately when a packet arrives and its destination server is not available.

A. expire_nodest_conn

B. expire_curr_conn

C. drop_entry

D. drop_curr_conn

DRBD is equivalent to a networked version of what RAID level?

A. 0

B. 1

C. 2

D. 5