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EMC Network Attached Storage (NAS) Specialist Exam for Storage Administrators : E20-538

E20-538

Exam Code: E20-538

Exam Name: Network Attached Storage (NAS) Specialist Exam for Storage Administrators

Updated: Aug 18, 2026

Q & A: 115 Questions and Answers

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EMC E20-538 Exam Syllabus Topics:

SectionObjectives
Topic 1: Administration and Management- Day-to-day operations
  • 1. User and permission management
    • 2. Monitoring and performance tuning
      Topic 2: Installation and Configuration- Deployment and setup
      • 1. NAS system initialization
        • 2. Network configuration and storage provisioning
          Topic 3: EMC NAS Solutions Architecture- Dell EMC file storage systems
          • 1. VNX/VNXe file services components
            • 2. Isilon OneFS architecture overview
              Topic 4: Troubleshooting and Maintenance- Problem diagnosis
              • 1. File system and access issues
                • 2. Network and protocol troubleshooting
                  Topic 5: NAS Fundamentals- File storage concepts and architectures
                  • 1. Block vs file vs object storage overview
                    • 2. NAS use cases and benefits
                      Topic 6: NAS Protocols and Access- NFS and CIFS/SMB
                      • 1. Authentication and permissions
                        • 2. Client connectivity and configuration

                          EMC Network Attached Storage (NAS) Specialist Exam for Storage Administrators Sample Questions:

                          1. One of the Celerras in the data center dropped all client access suddenly. Upon further investigation, you discover that the primary blade is in a panicked state but did not fail over to the standby blade.
                          What is one possible cause for this?

                          A) The primary blade was unable to ping the standby blade.
                          B) The Control Station had NAS services started.
                          C) The Control Station was powered off.
                          D) The standby blade was running at reason code 5.


                          2. Between which layers of the OSI model would you find the iSCSI target?

                          A) 6 and 8
                          B) 1 and 3
                          C) 4 and 6
                          D) 2 and 4


                          3. You are implementing a Celerra CIFS solution. When discussing the mapping method choices, the site administrator asks you to explain the significance of the user mapping method for CIFS users.
                          How do you respond to the site administrator?

                          A) CIFS servers that join the Windows domain are assigned domain SIDs. The mapping method is used to uniquely identify the CIFS servers in the Windows AD domain to UNIX NFS servicers in the NIS domain.
                          B) Stand-alone CIFS servers require a manual SID assignment when configured on a Celerra. When users from the Windows domain access the Celerra the mapping method correlates the stand-alone CIFS server SID with the Windows user SIDs.
                          C) Celerra has a UxFS-based file system that requires UNIX style UIDs and GIDs for file and directory permissions. Windows users and groups are identified with SIDs. The mapping method correlates UNIX UIDs and GIDs to Windows SIDs for uniquely identifying users.
                          D) Celerra has a UxFS-based file system that stores UNIX style UIDs and GIDs and Windows SIDs for file and directory permissions. The mapping method correlates the SIDs for local group permissions on the CIFS server shares.


                          4. Which describes how a Usermapper client resolves a Windows SID to UNIX UID/GID?

                          A) Broadcasts over the internal Celerra network for secmap cache on server_2
                          B) Uses the ntxmap.conf file first, then the Data Mover secmap cache
                          C) Broadcasts over the internal Celerra network for a primary or secondary Usermapper service
                          D) Uses the resolution order defined in the Data Mover nsswitch.conf file


                          5. What component of an NDMP backup deployment provides access to the file systems to be backed up?

                          A) Secondary storage
                          B) NDMP server
                          C) DMA server
                          D) Backup client


                          Solutions:

                          Question # 1
                          Answer: C
                          Question # 2
                          Answer: C
                          Question # 3
                          Answer: C
                          Question # 4
                          Answer: C
                          Question # 5
                          Answer: B

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