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Which of the following circumstances prevent the usage of container based virtualization? (Choose TWO correct answers.)

  1. More than one container requires access to block devices available in the host system.
  2. Remote access via SSH is required to all containers.
  3. Each container needs to have its own user accounts and user groups.
  4. Administrators of containers must be able to install customized Linux kernels.
  5. Different operating systems are to be used within containers on the same virtualization host.

Answer(s): D,E

Which of the following statements are true regarding the determination of the capacity of a high availability cluster? (Choose TWO correct answers.)

  1. The overall capacity of all components in the cluster doesn't have to be larger than the resources needed in a regular setup.
  2. The number of nodes in a cluster has no effect on the availability as long as the sum of the available computing resources is equal.
  3. Failover clusters can be used to scale a single service beyond the capacity of a single cluster node.
  4. In regular cluster operation, not all resources are used.
  5. In case of the failure of any component, enough resources must remain to provide all cluster services.

Answer(s): D,E

What is the purpose of fencing in a high availability cluster?

  1. Prevent failed nodes from interfering with the remaining intact part of the cluster.
  2. Ensure a consistent assignment of all network connections from a client to the same cluster server.
  3. Define constraints on which services may run on the same cluster node.
  4. Enforce storage quota and other resource limitations for each service provided by the cluster.
  5. Provide multi-tenancy cluster configuration for cloud computing.

Answer(s): A

Which of the following statements are true regarding the handling of a hardware error in a high availability cluster? (Choose THREE correct answers.)

  1. High availability provides automatic recovery from software errors only and cannot mitigate hardware issues.
  2. After the cluster deals with an error, no manual actions are required to bring the cluster back to normal operation.
  3. Erroneous components are physically turned off as they are in an undefined state.
  4. Services are restarted on or redirected to other cluster nodes.
  5. The cluster management components monitor the health of all cluster components.

Answer(s): C,D,E

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