Lpi 304-200 問題集

質問 1：
Which of the following statements are true for full virtualization? (Choose TWO correct answers.)
A. Full virtualization may be supported by special CPU extensions that provide better performance.
B. Full virtualization always requires additional software components and cannot be done using Linux only.
C. Full virtualization has a severe performance impact and should not be used in production environments.
D. Full virtualization does not require changes to the guest operating systems.
E. Full virtualization has no performance impact compared to a non-virtualized bare-metal installation on the same machine.
正解：A,D

質問 2：
While setting up a load-balanced HTTP service, Linux Virtual Server was configured with the commands:
ipvsadm -A -t 198.51.100.2:80 -s rr
ipvsadm -a -t 198.51.100.2:80 -r 192.168.10.1:80 -m
ipvsadm -a -t 198.51.100.2:80 -r 192.168.10.2:80 -m
and all backend servers are using the LVS host as the default router. Which additional command has to be issued on the LVS host in order to correctly handle incoming HTTP traffic?
A. netstat -r
B. echo "1" > /proc/sys/net/ipv4/ip_forward
C. iptables -t nat -Z
D. ipvsadmin -L -n
E. ipmasq -A 192.168.10.1 -A 192.168.10.2 -p tcp --dport www -j DEMASQ
正解：B

質問 3：
How does high availability clustering relate to periodic storage backup? (Choose TWO correct answers.)
A. Backups should be located only on the local storage of the cluster and should not be backed up in order to prevent bandwidth congestion.
B. Regular backups may be reduced to the cluster configuration and cluster state data as this information is sufficient to recover any state of the cluster, including data, at any time.
C. Regular backups become generally unnecessary as any data loss or corruption is automatically recovered by the high availability cluster.
D. Regular backups remain vital as they allow restoration of data that was accidentally deleted or corrupted.
E. Backup procedures may have to be adapted to the cluster to ensure complete and recoverable backups.
正解：D,E

質問 4：
Which of the following is true regarding the CPU of a KVM virtual machine? (Choose TWO correct answers.)
A. For each KVM virtual machine one dedicated physical CPU core must be reserved.
B. The CPU architecture of a KVM virtual machine is independent of the host system's architecture.
C. KVM virtual machines support multiple virtual CPUs in order to run SMP systems.
D. Each KVM virtual machine can only have one CPU with one core.
E. KVM uses the concept of virtual CPUs to map the virtual machines to physical CPUs.
正解：C,E

質問 5：
What is oVirt?
A. A library that provides access to several different virtualization technologies in a common manner.
B. An extension to the Linux Kernel used to provide container virtualization similar to LXC and OpenVZ.
C. A Linux-based hypervisor similar to KVM and Xen.
D. An approach used to eliminate the need for virtualization called Zero-Virt.
E. A comprehensive management infrastructure for Linux-based virtualization.
正解：E

質問 6：
Which of the following can be used as a low level device for DRBD? (Choose TWO correct answers.)
A. A tape streamer
B. A rewritable CD
C. A LVM logical volume
D. A physical hard disk
E. A virtual tape library
正解：C,D