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

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

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

D. By using a network file system or file transfer protocol.

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

A. A file system resource to mount the device.

B. A security resource in order to permit other cluster services to access the data on the DRBD device.

C. A replication resource that synchronizes the DRBD device's data to all nodes that may take over the device after a failover.

D. A health resource in order to check the integrity of the file system.

E. A constraint to ensure the device is mounted before the dependent services are started.

A. An extension to the Linux Kernel used to provide container virtualization similar to LXC and OpenVZ.

B. A library that provides access to several different virtualization technologies in a common manner.

C. An approach used to eliminate the need for virtualization called Zero-Virt.

D. A comprehensive management infrastructure for Linux-based virtualization.

E. A Linux-based hypervisor similar to KVM and Xen.

A. It is up to the virtual machine to use its assigned hardware resources and create, for example, an arbitrary amount of network sockets.

B. All processes created within the virtual machines are transparently and equally scheduled in the host system for CPU and I/O usage.

C. The hypervisor provides each virtual machine with hardware of a defined capacity that limits the resources of the virtual machine.

D. The hypervisor may provide fine-grained limits to internal elements of the guest operating system such as the number of processes.

E. Full virtualization cannot pose any limits to virtual machines and always assigns the host system's resources in a first-come-first-serve manner.

A. Failover clusters always require storage that is shared by all nodes.

B. In normal operation, services may be spread over all nodes.

C. Every service may not be run more than once in a cluster.

D. The core component of every failover cluster is a load balancer.

E. Failover clusters provide scalability of a service beyond the capacities of one cluster node.

A. A shared storage device accessible by all nodes using the OCFS2 filesystem.

B. A clone resource for the OCFS2 file system.

C. The O2CB service.

D. The cluster logical volume manager (CLVM).

E. The distributed lock manager (DLM).