EMC DES-1D12 Online Practice Questions and Exam Preparation

EMC DES-1D12 Online Questions & Answers

• Question 11:

  How does configuring snapshot retention differ when manually creating snapshots in the Dell EMC Unity GUI, compared to using the Unity CLI?

  A. Manually created snapshots do not have the `No automatic deletion' option. Snapshots created with Unity CLI have the `No automatic deletion' option.
  B. Manually created snapshots have the `No automatic deletion' option. Snapshots created with Unity CLI do not have the `No automatic deletion' option.
  C. The retention period for manually created snapshots is days. The retention period for snapshots created with Unity CLI can be hours or days.
  D. The retention period for manually created snapshots can be hours or days. The retention period for snapshots created with Unity CLI is days.
  B. Manually created snapshots have the `No automatic deletion' option. Snapshots created with Unity CLI do not have the `No automatic deletion' option.

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  Explanation/Reference:

  Reference:https://docplayer.net/77745477-Dell-emc-unity-snapshots-and-thin-clones.html

• Question 12:

  A Dell PowerStore administrator has been asked to create a NAS file sharing environment for several clients. The clients will be running either Linux (NFS) or Windows (SMB) and must have access to the same data simultaneously

  How can this be achieved using Dell PowerStore?

  A. Configure two NAS servers place all Linux data in one and all Windows data in the other
  B. Configure a snapshot rule and protection policy and apply it to the file system
  C. Configure multiprotocol access to required file system
  D. Configure file data to be replicated for access by different client types
  C. Configure multiprotocol access to required file system

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  Explanation/Reference:

  Dell PowerStore allows you to create a NAS file sharing environment for several clients by configuring multiprotocol access to the required file system. This means that the same file system can be accessed by both Linux and Windows clients using either the NFS or SMB protocols. This can be achieved by creating a file system, and configuring it to allow access using both the NFS and SMB protocols. Once the file system is set up, you can assign permissions and share the file system with the appropriate clients. This way, the clients will be able to access the same data simultaneously, regardless of whether they are running Linux or Windows and which protocol they are using. It's not necessary to replicate data for access by different client types, it would be an extra step that would consume more resources and would be unnecessary

• Question 13:

  A customer is managing a Dell EMC SC7020 array running SCOS 7.2. The array is running out of capacity. The customer asks you to begin scoping the system for additional drives. What disk drive redundancy rule applies to 3.84 TB SSDs?

  A. Forced Dual Redundancy
  B. Default Dual Redundancy
  C. Default Single Redundancy
  D. Forced Non-Redundancy
  B. Default Dual Redundancy

• Question 14:

  Which describes cascade replication on a Dell Unity XT?

  A. Synchronous replication of a file resource from Sites A to B. then B to C then C to D
  B. Asynchronous replication of a block resource from Sites A to B then B to C then C to D
  C. Synchronous replication of a block resource from Sites A to B. then B to C. then C to D
  D. Asynchronous replication of a file resource from Sites A to B then B to C. then C to D
  D. Asynchronous replication of a file resource from Sites A to B then B to C. then C to D

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  Explanation/Reference:

  Cascade replication refers to the replication of data from one site to another, in a sequential or cascading manner. In the case of Dell Unity XT, cascade replication refers to the asynchronous replication of a file resource from one site (site A) to another (site B), then from site B to another site (site C) and so on. This means that data is replicated from one site to another in an orderly fashion, and each site functions as both a source and a target for replication. This allows for multiple copies of the data to be kept in different locations, providing increased data availability and disaster recovery capabilities. It's important to note that cascade replication can also be used for block resources but is usually asynchronous.

• Question 15:

  DRAG DROP

  Match each term with its description.

  Select and Place:

  

  

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  Explanation/Reference:

  Throughput = Sized by type and number of ports to handle traffic Latency = Time taken for an IO to be executed IOPS = Amount IO generated by application Queue depth = IOS in buffer waiting to be executed

• Question 16:

  Which front-end protocol card in Dell Unity XT 380 offloads processing to save CPU cycles for other operations?

  A. Fibre Channel
  B. CNA fonSCSI
  C. SAS
  D. CNA for Fibre Channel
  B. CNA fonSCSI

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  Explanation/Reference:

  (Converged Network Adapter for iSCSI) is the front-end protocol card in Dell Unity XT 380 that offloads processing to save CPU cycles for other operations. It enables the Unity XT 380 to handle iSCSI traffic, which reduces the workload on the host server's CPU and improves overall system performance.

• Question 17:

  Which network option should be configured to provide the best iSCSI performance on a Dell Unity XT array?

  A. A iSCSI offload
  B. Single VLAN for all traffic
  C. Jumbo frames
  D. Disable flow control
  A. A iSCSI offload

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  Explanation/Reference:

  iSCSI offload is a network option that can be configured to provide the best iSCSI performance on a Dell Unity XT array. This option offloads iSCSI processing to the network adapter card, reducing the load on the host CPU and improving performance. With iSCSI offload enabled, the network adapter card can handle iSCSI processing tasks such as packet segmentation and reassembly, reducing the CPU overhead associated with iSCSI operations. Other options such as using a single VLAN for all traffic, configuring jumbo frames and disabling flow control may also help to improve iSCSI performance but iSCSI offload would provide the best results. It is important to note that configuring jumbo frames could have a positive impact on performance, but it also depends on the network infrastructure and the NICs support for it. Disabling flow control could cause issues on congested networks, so it's important to test it before disabling it.

• Question 18:

  Which parameters can be selected when sizing a Dell Unity XT 480F using the System Design method?

  A. Drive count and RAID level Percentage of random writes and reads
  B. Data reduction ratio Percentage of sequential writes and reads
  C. One of four workload types Drive count and RAID level
  D. One of two block sizes Application type
  C. One of four workload types Drive count and RAID level

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  Explanation/Reference:

  When sizing a Dell Unity XT 480F using the System Design method, you can select one of four workload types and Drive count and RAID level. This workload type selection will take into account the specific IOPS and capacity requirements of the environment. The drive count and RAID level will determine the overall capacity and level of data protection required.

• Question 19:

  Which encryption algorithm is used for SMB shares on Dell EMC Unity?

  A. AES-CCM
  B. AES128-GCM
  C. AES-CMAC
  D. HMAC-SHA256
  B. AES128-GCM

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  Explanation/Reference:

  This provides improved security and encryption traffic performance for SMB3 by changing the encryption algorithm from AES-CCM-128 to AESGCM-128. Page 40 :https://www.delltechnologies.com/en-zm/collaterals/unauth/white-papers/products/storage/h15572-dell-emc-unity-nas-capabilities.pdf

• Question 20:

  What is a benefit of restoring data from a Dell EMC Unity snapshot?

  A. Can select which Consistency Group members have data restored
  B. Supports replication to up to 32 remote systems
  C. Enables efficient storage usage with 8 KB block granularity
  D. Does not require additional pool storage
  D. Does not require additional pool storage