EMC E20-885 Online Practice Questions and Exam Preparation

EMC E20-885 Online Questions & Answers

• Question 51:

  Refer to the exhibit.

  

  LUN 30 is a 50 GB LUN on a 4+1 R5 group consisting of 300 GB drives. It is the only active LUN. What can you infer about the I/O access pattern to LUN 30?

  A. I/O is very random.
  B. I/O is largely sequential.
  C. Locality of reference is high.
  D. Locality of reference is low.
  A. I/O is very random.

• Question 52:

  A customer has a highly active ordering application with a R/W ratio of 2:1. The application peaks at about 16,000 application IOPS during the day.

  What is the minimum required number of eMLC Flash drives and 10K rpm SAS drives needed in a R5 Storage Pool to meet the performance requirements?

  A. 80 SAS drives, 5 Flash drives
  B. 95 SAS drives, 5 Flash drives
  C. 140 SAS drives, 5 Flash drives
  D. 165 SAS drives, 5 Flash drives
  B. 95 SAS drives, 5 Flash drives

• Question 53:

  A customer has a Windows-only environment connected to an EMC VNX for File at their main campus site. The customer plans to install a new EMC VNX at a remote branch office site. The new VNX will be used to implement a DR solution

  for their main campus VNX using several deduplicated file systems shared and available to clients via CIFS.

  Which solution do you recommend to the customer?

  A. Use VNX Replicator to replicate the VNX VDMs and associated file systems from the main campus site to the VNX system at the branch office site to provide an asynchronous DR solution.
  B. Use VNX Replicator to replicate the VNX VDMs and associated file systems from the main campus site to the VNX system at the branch office site to provide a synchronous DR solution.
  C. Use VNX SAN Copy to replicate the VNX block devices associated with the VNX file systems from the main campus site to the VNX system at the branch office site to provide a synchronous DR solution.
  D. Use VNX MirrorView/A to replicate the VNX block devices associated with the VNX file systems from the main campus site to the VNX system at the branch office site to provide an asynchronous DR solution.
  A. Use VNX Replicator to replicate the VNX VDMs and associated file systems from the main campus site to the VNX system at the branch office site to provide an asynchronous DR solution.

• Question 54:

  A customer uses Replication Manager Version 5 to make replicas of their Windows 2003 server. The customer installs a new Windows 2008 server and tries to mount the replica. The customer reports they cannot mount the replica to the new server. What is the likely issue?

  A. Windows 2003 data can only be mounted on Windows 2003 hosts.
  B. Replication Manager is not installed on the new server.
  C. Replication Manager only supports Windows 2003.
  D. Windows 2008 Replication License is installed.
  A. Windows 2003 data can only be mounted on Windows 2003 hosts.

• Question 55:

  You are implementing SAN Copy for Linux hosts connected to an EMC VNX using FC and iSCSI connectivity. There are eight queued sessions and multiple applications contending for bandwidth. Which configurable SAN Copy feature would you recommend?

  A. Fibre Preferred
  B. SP Reboot
  C. LUN Trespass
  D. admhost
  A. Fibre Preferred

• Question 56:

  A customer recently added several new applications to an EMC VNX. Some of the new applications are experiencing very long response times. The customer suspects a high TCP retransmission rate is causing the long response times. How could the customer determine the TCP retransmission rate?

  A. % retransmissions = (retransmissions / packets sent) * 100
  B. % retransmissions = (packets sent/retransmissions) * 100
  C. % retransmissions = (retransmissions *packets sent) /100
  D. % retransmissions = (retransmissions *packets sent) * 100
  A. % retransmissions = (retransmissions / packets sent) * 100

• Question 57:

  A Storage Administrator would like to use Manual Volume Management to create file systems for their Oracle database log files. Which volume configuration is suitable for storing log information?

  A. disk > meta
  B. disk > stripe > meta
  C. disk > stripe > slice > meta
  D. disk > slice > stripe > meta
  A. disk > meta

• Question 58:

  A customer plans to replicate an Oracle instance to an EMC VNX located in their test environment. What Oracle files are required to be replicated to ensure that the database will start up?

  A. control files, data files, redo log files
  B. data files, control files, archive log files
  C. control files, spfile, data files
  D. data files, archive log files, pfile
  A. control files, data files, redo log files

• Question 59:

  A customer would like to have FAST Cache enabled on their VNX with MCx. They are concerned about performance degradation during this event. What should you tell the customer regarding the performance impact at the moment when FAST Cache is enabled?

  A. Enabling FAST Cache can be done at any time during the day without any performance degradation.
  B. Enabling FAST Cache should be done at a low I/O moment to minimize performance impact.
  C. Manually disable Read Cache, enable FAST Cache and re-enable Read Cache to minimize performance impact.
  D. Manually disable Write Cache, enable FAST Cache and re-enable Write Cache to minimize performance impact.
  A. Enabling FAST Cache can be done at any time during the day without any performance degradation.

• Question 60:

  A customer has two identically configured Linux hosts (OS version, memory, CPU) attached to the same network. One host is NFS-attached and the other is FC-attached to an EMC VNX. Both the NFS file systems and the SAN LUNs are created from four RAID 5 (4+1) RAID groups. LUNs are not shared between file and block.

  The customer reports NFS-attached host is able to achieve much greater throughput via NFSv4 versus the FC-attached host. What is the source of the performance difference between the file and block configurations?

  A. FC encapsulation overhead
  B. I/O size
  C. Host Patch levels
  D. NFS version
  B. I/O size