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2021 Nov 304-200 test question
Q1. CORRECT TEXT
In the command: crm configure http-after-ipv4 Mandatory: VHost1IPv4 HTTPD which missing word is required in order to ensure that the service HTTPD is always started after the service VHost1IP?
Q2. What is the name and path of the configuration file for the O2CB cluster that coordinates the nodes using OCFS2 filesystems?
Q3. Which of the following describes a split brain situation in a high availability cluster?
A. Several cluster nodes access a shared resource without coordination.
B. Several cluster nodes run different instances of the same services.
C. Incoming network connections are accidentally forwarded to more than one backend server.
D. Instead of shared storage, each node uses local storage managed by itself and replicates with other nodes.
E. In addition to shared storage, each node has local storage that is not shared with other nodes.
Q4. Which of the following statements are true regarding hardware based virtualization?
(Choose TWO correct answers.)
A. Hardware based virtualization requires special support in the host system's hardware which is present in all recent x86-based computers.
B. Hardware based virtualization implements a whole machine in software and therefore can run virtual machines of a given hardware platform on an arbitrary host system.
C. Hardware based virtualization relies on the host system's processor to call the hypervisor when critical instructions are executed by a virtual machine.
D. Hardware based virtualization is not available on x86-based CPU architectures and requires special virtualization host hardware.
Answer: A, C
Q5. CORRECT TEXT
What is the name of the kernel module that is required to be loaded in order to use KVM on an Intel CPU architecture? (Specify ONLY the module name without any path information and with or without the module suffix.)
kvm-intel.ko, kvm-intel, kvm_intel.ko, kvm_intel
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Q6. 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
-m and all backend serversare 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. echo "1" > /proc/sys/net/ipv4/ip_forward
B. iptables -t nat -Z
C. ipvsadmin -L -n
D. ipmasq -A 192.168.10.1 -A 192.168.10.2 -p tcp --dport www -j DEMASQ
E. netstat -r
Q7. CORRECT TEXT Which sub-command of xl lists the block devices that are currently attached to a Xen guest domain? (Specify ONLY the sub-command without any path or parameters.)
block-list, xl block-list
Q8. Which of the following statements are true regarding VirtualBox?
A. It supports only Linux as a guest operating system.
B. It is available for Linux only.
C. It provides both a graphical user interface and command line tools to administer virtual machines.
D. It requires dedicated shared storage as it cannot store virtual machine disk images locally on block devices of the virtualization host.
E. It is a special kernel booted before the first regular operating system.
Q9. 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
A. It is necessary to use the xl command to change Slack's state to running.
B. CentOS is the domain which has consumed the most CPU time.
C. The domain with ID 2 uses paravirtualization.
D. Both Debian and Slack require xl commands to start running.
E. Slack is idle or waiting for I/O.
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.
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