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EMC E20-385 Exam Questions

EMC E20-385 Exam Questions Answers

Data Domain Specialist Exam for Implementation Engineers

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  Updated August 03,2026
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EMC E20-385 Sample Questions – Free Practice Test & Real Exam Prep

Question #1

A delivery specialist wants to integrate a Dell EMC Data Domain system into an existing backup environment using NAS. What are the supported protocols?

  • A. CIFS and NFS only
  • B. CIFS, NFS, DD Boost, and VTL
  • C. CIFS, NFS, and DD Boost only
  • D. CIFS, NFS, and VTL only
Answer: B
Question #2

You are responsible for capacity planning in an EMC Data Domain environment. While monitoring space usage over a series of weeks, you notice a sudden increase in space consumption. The new rate of consumption will require additional capacity.What is the most likely cause? 

  • A. A new project on the client systems involve high volume of pre-compressed file types
  • B. Retention period was decreased from 16 weeks to 12 weeks
  • C. Rate of full backups was changed from twice a week to once a week
  • D. Rate of change in incoming data is resulting in fewer incremental backups
Answer: A
Question #3

In a DD Boost environment, which storage is supported when using a Dell EMC ProtectPoint solution?

  • A. VMAX
  • B. VNX
  • C. Unity
  • D. VMAX3
Answer: D
Question #4

An EMC Data Domain customer wants VTL replication functionality. Which licensing option is required?

  • A. A single VTL license applied to the source Data Domain.A Replicator license applied to both the source and destination Data Domains.
  • B. A VTL license applied to both the source and destination Data Domains.
  • C. A single VTL license applied to the destination Data Domain.A Replicator license applied to both the source and destination Data Domains.
  • D. A Replicator license applied only to the source Data Domain.
Answer: A
Question #5

A customer has EMC Data Domain system installed in their data center for two weeks. The environment consists of the following.1. Data Domain is configured as the primary backup device being shared by Avamar, NetBackup, Oracle RMAN, and SQL Server backup clients  2. Avamar and NetBackup are using DD Boost to backup a total of 500 clients (250 each)3. Avamar is configured to allow a maximum of 100 concurrent backups4. NetBackup is configured to allow 150 concurrent backups writing to the Data Domain with the backup window starting at 8 P.M. nightlyA total of 50 production Oracle servers are using NFS and 50 production SQL servers are using CIFS, each performing full backups nightly between 11 P.M. and 5 A.M. The archive and transaction logs backs up every 15 minutes. The retention for all client backups is 30 days.The backup administrators notice that between 8 P.M. and 11 P.M. every night, the Data Domain CPU is at 100% utilization. What is a potential reason for the high CPU utilization?  

  • A. Maximum streams threshold has been exceeded on the Data Domain
  • B. Snapshots are scheduled during the backup window
  • C. Network throughput is being over utilized
  • D. Data Domain default cleaning schedule is running during the backup window
Answer: A
Question #6

Which command erases segments associated with deleted files that cannot be globally erased because the segments might be used by other files?

  • A. filesys clear, start
  • B. storage sanitize
  • C. system sanitize
  • D. filesys clean set
Answer: D
Question #7

An organization currently writes backups to an EMC Data Domain system and then creates encrypted copies of their backups on tapes. These tapes are then shipped to a third-party offsite vault.They are now planning to deploy a second Data Domain system in a hosted disaster recovery site as a replication target. This will replace the use of the offsite tapes. The two sites are connected through an encrypted WAN link.Where should encryption be applied on the Data Domain systems to ensure a similar level of data security as their current process?  

  • A. Enable Encryption of Data at Rest at the disaster recovery site
  • B. Use encryption of data in flight to the hosted disaster recovery site
  • C. Enable Encryption of Data at Rest at the source site
  • D. WAN link between the sites is already encrypted 
Answer: A
Question #8

What is the current NAA type in the WWN format used within EMC Data Domain OS 5.4?

  • A. 1
  • B. 2
  • C. 5
  • D. 6
Answer: C
Question #9

What is the default behavior for the "messages" log file in an EMC Data Domain system?

  • A. Every Sunday a new log file is opened and the previous log file is renamed
  • B. Every day a new log file is opened and the previous log file is renamed
  • C. Every Sunday at 03:00 the log file is purged
  • D. Log file continues to grow indefinitely
Answer: A
Question #10

What is a benefit of the Dell EMC Data Domain Secure Multi-Tenancy feature?

  • A. Enables deployment of Data Domain systems in a public cloud only
  • B. Allows for delivery of Data Protection as a Service
  • C. Improves cost efficiency through a dedicated infrastructure
  • D. Provides a single cloud model for protected storage
Answer: C
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