304-200 無料問題集「Lpi LPIC-3 Exam 304: Virtualization & High Availability, version 2.0」

（A）Database servers to store relational data.

（B）Block storage devices for persistent data storage.

（C）Virtual machines for computing tasks.

（D）Application servers for immediate deployment with Mono applications.

（E）Object storage that is accessed through an API.

（A）It is a web interface used to provide self-service domain provisioning to users with sufficient privileges.

（B）It manages disk file images on behalf of all virtual machines and provides them as virtual devices to guest domains.

（C）It saves the persistent configuration of all defined Xen domains and restores them when the host system is started.

（D）It is a software repository located within the host system used to provide software packages to the guest domains.

（E）It stores run time information regarding Xen and its domains using hierarchical namespaces shared between domains.

（A）Load balancers cannot be protected against outages which is why they should always be built on dedicated hardware.

（B）Two or more load balancers should be deployed as a cascade that passes packets from one to the other.

（C）Two load balancers should be deployed as a failover cluster.

（D）Load balancers are used for performance and scalability reasons only and cannot be used to archive high availability clusters.

（E）No actions are necessary as a load balancer cannot become a single point of failure.

（A）Ctrl-Alt-0

（B）Ctrl-Alt-3

（C）Ctrl-Alt-2

（D）Ctrl-Alt-1

（E）Ctrl-Alt-4

（A）By setting up a ramdisk in one virtual machine and mounting it using its UUID in the other VMs.

（B）By default, Linux-based virtualization products provide full access to the host system to all virtual machines.

（C）By mounting other VM's file systems from /dev/virt-disks/remote/.

（D）By attaching the same virtual hard disk to all virtual machines and activating EXT4 sharing extensions on it.

（E）By using a network file system or file transfer protocol.

（A）drbd

（B）rsyncd

（C）clmirror

（D）clraid

（A）virtuald

（B）libvirt-worker

（C）vmd

（D）libvirtd

（E）libvirtmgr

（A）ldirectord

（B）lvproxy

（C）keepalived

（D）vserverd

（E）roundrobind

（A）Full virtualization has no performance impact compared to a non-virtualized bare-metal installation on the same machine.

（B）Full virtualization has a severe performance impact and should not be used in production environments.

（C）Full virtualization does not require changes to the guest operating systems.

（D）Full virtualization may be supported by special CPU extensions that provide better performance.

（E）Full virtualization always requires additional software components and cannot be done using Linux only.

（A）INI-style text files

（B）XML files

（C）SQLite databases

（D）Java-like .properties files

（E）Text files containing key/value pairs