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Q9. What action does the virsh restore command perform? 

A. It restores a virtual machine that was stopped by a kernel panic. 

B. It restores a virtual machine from a state file. 

C. It reverts a virtual machine, including its storage devices, to a previously saved state. 

D. It wakes up a virtual machine that was hibernated by the operating system running inside the virtual machine. 

Answer: B 


Q10. Which of the following statements describes the concept behind paravirtualization? 

A. Guest operating systems are modified to actively cooperate with the hypervisor in order to ease virtualization costs and gain better performance. 

B. Instead of running full virtual machines, containers are used to separate distinct parts of one commonly shared operating system that appear as a virtual machine. 

C. To avoid the need for virtualization, special security measures are taken to allow different applications to coexist on one physical machine. 

D. Each operating system is trusted to use only those resources assigned to it, thereby eliminating the need of an additional virtualization layer. 

Answer: A 


Q11. Which one of the following optionsrepresentsa 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 

Answer: C 


Q12. What is the effect of running the virsh vcpupin CLUSNODE-2 4 2 command? 

A. It sets the affinity of virtual CPU 4 of virtual machine CLUSNODE-2 to physical processor 2. 

B. It reduces the number of virtual CPUs in CLUSNODE-2 from 4 to 2. C. It increases the number of virtual CPUs in CLUSNODE-2 from 2 to 4. 

D. It sets the affinity for all virtual CPUs of virtual machine CLUSNODE-2 to the physical processors 2 and 4. 

Answer: A 


Q13. Which of the following statementsaretrue regarding Xen domains? (Choose TWO correct answers.) 

A. Fully virtualized and paravirtualized domains are managed using the same tools and commands. 

B. Xen domains of all types require virtualization extensions in the host system's CPU. 

C. All fully virtualized domains are called 'Dom0' while all paravirtualized domains are called 'DomU'. 

D. Both paravirtualized and fully virtualized domains may run on the same host system. 

E. Paravirtualized domainsare significantly slower than fully virtualized domains. 

Answer: A, D 


Q14. In order to use the option dom0_mem to limit the amount of memory assigned to the Xen Domain-0, where must this option be specified? 

A. In its Makefile, when Xen is built. 

B. In the configuration file /etc/xen/Domain-0.cfg, when Xen starts. 

C. In the bootloader configuration, when Xen is booted. 

D. In its .config file, when the Domain-0 kernel is built. 

E. In any of Xen's global configuration files. 

Answer: C 


Q15. Which of the following technologies is the most important component of IaaS clouds? 

A. Database replication 

B. DNS delegation 

C. Emulation 

D. Mandatory Access Control 

E. Virtualization 

Answer: E 


Q16. When using the gatewaying/direct routing forwarding method of Linux Virtual Server (LVS), which of the following statements is true? 

A. The default route of all backend servers must point to the LVS host. 

B. Every backend server must accept packets addressed to the IP address of the virtual service. 

C. On the backend servers, all packets appear to originate from the IP address of the LVS host. 

D. The link layer addresses of all backend servers must be included in the LVS configuration. 

E. When using gatewaying/direct routing, only the round robin algorithm is available. 

Answer: B