EMC E20-885 Online Practice Questions and Exam Preparation

EMC E20-885 Online Questions & Answers

• Question 11:

  A customer requires their FAST Cache configuration to be destroyed in order to increase FAST Cache size. However, they are concerned about the performance impact that this will cause. What should you tell the customer to expect?

  A. Increased write activity on data disks from LUNs that were FAST Cache enabled
  B. Increased write activity on FAST Cache disks from LUNs that were FAST Cache enabled
  C. Temporary suspension of all write I/O to DRAM cache
  D. Temporarily bypass of DRAM cache by all write I/O
  A. Increased write activity on data disks from LUNs that were FAST Cache enabled

• Question 12:

  A customer has an ESX 5.0 environment attached to an EMC VNX with VAAI enabled. They would like to Storage vMotion a guest host to another datastore. How does enabling VAAI on the VNX benefit Storage VMotion?

  A. Network traffic is offloaded to the VNX
  B. The ESX host compresses the data
  C. There is no benefit with VAAI and VNX
  D. The Guest Host does not need to be powered off
  A. Network traffic is offloaded to the VNX

• Question 13:

  Management plans to implement and replicate CIFS shares on two VNX arrays. They will be using CAVA as part of their data protection plan to protect these CIFS shares. Which configuration will satisfy this requirement?

  A. Create a global CIFS server on the physical Data Mover at the primary and DR sites.
  B. Configure the CAVA client on the virtual Data Mover at the primary and DR sites.
  C. Configure the CAVA client on the VNX Control Station at the primary and DR sites.
  D. Create a global CIFS server on the virtual Data Mover at the primary and DR sites.
  A. Create a global CIFS server on the physical Data Mover at the primary and DR sites.

• Question 14:

  Click on the calculator in the upper left-hand corner. A customer needs to protect twenty LUNs in their VMware environment with SnapView. The LUNs sizes are as follows:

  -

  Four 20 GB LUNs

  -

  Four 35 GB LUNs

  -

  Four 40 GB LUNs

  -

  Four 55 GB LUNs

  -

  Four 65 GB LUNs

  What is the recommended number and size of reserved LUNs?

  A. Twenty 4.3 GB reserved LUNs
  B. Ten 8.6 GB reserved LUNs
  C. Four 21.5 GB reserved LUNs
  D. Forty 4.3 GB reserved LUNs
  D. Forty 4.3 GB reserved LUNs

• Question 15:

  A customer has an Oracle ASM database on an EMC VNX with FAST Suite enabled. They observe intermittent performance degradation due to momentary data hot spots caused by bursty transaction rates. What recommendation would you make to help alleviate these hot spots?

  A. Enable Fast VP on the ASM LUNs
  B. Modify the ASM rebalance power priority
  C. Enable Fast Cache on the ASM LUNs
  D. Disable ASM storage management
  C. Enable Fast Cache on the ASM LUNs

• Question 16:

  A customer configures an Incremental SAN Copy session between a 500 GB LUN and a 550 GB thick LUN on a new DR VNX. The reserved LUN pool has 50 GB of free space. The source VNX has registered with the DR VNX. The SAN Copy session does not start. What is the cause of the issue?

  A. There is insufficient reserved space.
  B. The SnapView enabler is not installed.
  C. SAN Copy between a thin and thick LUN is unsupported.
  D. Destination LUN is a 550 GB thick LUN.
  A. There is insufficient reserved space.

• Question 17:

  Refer to the exhibit.

  

  You are implementing a new VNX and you are considering whether or not to use FAST Cache. You decide to test the effect on response times with and without FAST Cache. At what point in the graph is FAST Cache turned OFF?

  A. D
  B. C
  C. B
  D. E
  A. D

• Question 18:

  Exchange 2010 has been installed on a virtual machine using RDMs in physical mode. What best practice should be followed when using Replication Manager with Exchange 2010?

  A. Use separate volumes for each database
  B. Use PowerPath or MPIO for multipathing
  C. Create separate partitions for the log and database volumes
  D. Use circular logging to limit transaction log sizes
  A. Use separate volumes for each database

• Question 19:

  You review a Unisphere Analyzer report from a customer's EMC VNX. You observe that disk read activity is higher than can be accounted for from host reads and normal pre-fetch activity. What is the likely cause?

  A. Writes on the array are reasonably sequential, but there is not enough data in cache to fill each stripe.
  B. Individual writes are being requested and sequenced until the entire stripe is cached and parity is calculated before being written.
  C. Disk crossings and stripe crossings are normal events where large I/O is involved.
  D. The Unisphere Analyzer report was run against the wrong storage processor.
  A. Writes on the array are reasonably sequential, but there is not enough data in cache to fill each stripe.

• Question 20:

  When using AVM, when is it acceptable to stripe all dvols across the same RAID Group?

  A. When using Flash drives
  B. When using NL-SAS drives
  C. When using SAS drives
  D. It is never acceptable
  A. When using Flash drives