EMC EMC Certifications E20-385 Questions & Answers

• Question 101:

  What is an advantage of inline deduplication over post-process deduplication?

  A. Reduced time to disaster recovery readiness when replicating

  B. Disk cache tier ensures consistent write speed

  C. Increased deduplication from the use of variable segment sizes D. Write speed is increased by the number of disk spindles

  Correct Answer: A

• Question 102:

  A customer has a Data Domain system with one expansion shelf using RAID 6 disk protection. An active data disk has failed while another data disk is going through the reconstruction process. All remaining disks are active with no more spare disks.

  How many additional disk(s) can fail before data becomes unrecoverable?

  A. 0

  B. 1

  C. 2

  D. 3

  Correct Answer: B

• Question 103:

  Refer to the exhibit.

  

  Based on the exhibit, what does the difference between the inbound network rate and writes to disk indicate on the EMC Data Domain system?

  A. Much of the data is redundant and being deduplicated

  B. Much of the data is unique and being stored to disk

  C. A problem exists with the Data Domain system

  D. Data Domain system is deduplicating data faster than the backup server can send it

  Correct Answer: B

• Question 104:

  Refer to the Exhibit.

  

  On the EMC Data Domain system, what is the approximate amount of data sent to the system on March 2nd?

  A. 14 GiB

  B. 16 GiB

  C. 20 GiB

  D. 24 GiB

  Correct Answer: D

• Question 105:

  Refer to the Exhibit.

  

  On the EMC Data Domain system, what is the approximate amount of disk space consumed on November 11?

  A. 9 GiB

  B. 10 GiB

  C. 20 GiB

  D. 24 GiB

  Correct Answer: D

• Question 106:

  Refer to the Exhibit.

  

  Between February 27th and March 4th, what is the highest compression factor reached (approximately) on the EMC Data Domain system?

  A. 7

  B. 9.7

  C. 160

  D. 230

  Correct Answer: C

• Question 107:

  Refer to the Exhibit.

  

  On the EMC Data Domain system, what is the approximate amount of data sent to the system on November 11th?

  A. 70 GiB

  B. 80 GiB

  C. 200 GiB

  D. 220 GiB

  Correct Answer: D

• Question 108:

  Refer to the exhibit.

  

  When monitoring the system show performance command output, you notice that the state column has "D" for each line entry. What does the "D" in the "State" column indicate?

  A. Disk Reconstruction

  B. Disk Defragmentation

  C. Data Movement

  D. Data Integrity

  Correct Answer: A

• Question 109:

  Refer to the exhibit.

  

  When monitoring the system show stats command output, you notice that the "Disk Write KiB/s" column does not have same data rate as "Net eth0a in MB/s" column.

  What is a possible reason for this behavior?

  A. High inline deduplication on the Data Domain system

  B. Pre-encrypted data written to the Data Domain system

  C. Pre-compressed data written to the Data Domain system

  D. High internal file system latency on the Data Domain system

  Correct Answer: A

• Question 110:

  Refer to the exhibit

  

  You are installing an EMC Data Domain system with expansion shelves. When is the cable connector shown in the exhibit used?

  A. Connecting to the Host Port on an ES30 Shelf

  B. Connecting to the Expansion Port on an ES30 Shelf

  C. Connecting to the Expansion Port on an ES20 Shelf

  D. Connecting to the Host Port on an ES20 Shelf

  Correct Answer: A