EMC E20-390 Online Practice Questions and Exam Preparation

EMC E20-390 Online Questions & Answers

• Question 141:

  What describes the VNX Snapview Snapshot source LUN write process?

  A. Host issues write. Old data is copied to the reserve LUN pool. New data is written to the source LUN.
  B. Host issues write. New data is written to a new location.
  C. Host issues write. Old data is copied to the source LUN. New data is written to the reserve LUN pool.
  D. Host issues write. Data is written to the reserve LUN pool.
  A. Host issues write. Old data is copied to the reserve LUN pool. New data is written to the source LUN.

• Question 142:

  Which two protocols can be used for DNS communication on a Data Mover?

  A. TCP and UDP
  B. TCP and ICMP
  C. UDP and ICMP
  D. UDP and TLS
  A. TCP and UDP

• Question 143:

  An administrator has one VMware ESX host using an NFS export on a VNX system. Recently, in an effort to improve performance, they configured a two-port LACP trunk on the VNX system. There was no noticeable change in performance

  after the implementation of LACP.

  After reviewing traffic data on the switch, the customer notices that all traffic is using the same physical link.

  What does the customer need to know about LACP?

  A. The second physical link in the LACP trunk is configured as a standby.
  B. The default hashing algorithms will not improve the performance of any single host.
  C. The customer is not utilizing enough bandwidth to need any of the capacity on the second physical link.
  D. LACP trunking still needs to be enabled on the switch ports.
  B. The default hashing algorithms will not improve the performance of any single host.

• Question 144:

  Which VNX RAID type is suggested for performance and protection for small block random writes to disk?

  A. RAID 5
  B. RAID 6
  C. RAID 0
  D. RAID 1/0
  D. RAID 1/0

• Question 145:

  For what reason would you increase the default Ethernet frame MTU on a VNX Datamover?

  A. To match the end-to-end network connectivity to the client
  B. To improve network performance in a mixed MTU environment
  C. To increase the FAST Cache performance
  D. There is no need to change the default Ethernet frame size as it is already optimized for performance
  A. To match the end-to-end network connectivity to the client

• Question 146:

  After adding LUNs to a storage group for a newly attached SAN host, the host cannot access any of the LUNs. When looking at the Unisphere Host Initiators page to verify connectivity, the storage group listed for the host is ~management. Which step was missed when provisioning this host?

  A. Adding the host to the storage group
  B. Assigning host IDs to the LUNs
  C. Manually registering the host initiators
  D. Setting the correct failover mode for the host initiators
  A. Adding the host to the storage group

• Question 147:

  A Windows Server 2008 host is connected to a VNX series array, using dual FC adapters and running PowerPath 5.5 software. What is the correct ALUA failover mode for this host?

  A. Mode 0
  B. Mode 1
  C. Mode 2
  D. Mode 4
  D. Mode 4

• Question 148:

  A new SAN attached host is unable to see the LUNs created for it on a VNX array. When looking at the host initiators to verify connectivity the Storage Group listed for the host is ~management. Which step was missed when provisioning this host?

  A. Adding the host to the Storage Group
  B. Adding LUNs to the Storage Group
  C. Manually registering the host initiators
  D. Setting the correct Failover Mode for host initiators
  A. Adding the host to the Storage Group

• Question 149:

  In order to manually register a host, which type of information is required?

  A. IP address, host name, and host WWN
  B. IP address, HBA type, and host array
  C. Host name, array CommPath, and storage group
  D. Host name, initiator type, and SP port physical location
  A. IP address, host name, and host WWN

• Question 150:

  Which command is used to read the audit trail?

  A. /sbin/aureport
  B. /sbin/ausearch
  C. /nas/sbin/aureport
  D. more /var/log/audit.log
  B. /sbin/ausearch