EMC DES-1D12 Online Practice Questions and Exam Preparation

EMC DES-1D12 Online Questions & Answers

• Question 121:

  You are designing a two-tiered Dell EMC SC Series solution that will be optimized for performance. You gather the necessary data from Live Optics and find that the read/write ratio is 80:20. What approach is recommended?

  A. Size Tier 1 for 100% of the adjusted IOPS
  B. Use distributed adjusted IOPS for all tiers
  C. Use distributed adjusted IOPS for Tiers 1 and 2 only
  D. Size Tier 2 for 100% of the adjusted IOPS
  A. Size Tier 1 for 100% of the adjusted IOPS

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  Explanation/Reference:

  "The engineer should design a system to handle all, or nearly all, IOPS in one particular tier"

• Question 122:

  What are the two biggest factors that determine IOPS when using SSDs in a Dell EMC SC Series array?

  A. Current latency and queue depth
  B. Application block size and overall throughput
  C. Multi-tenant arrays and tier configuration
  D. Read/write percentage and peak workload
  B. Application block size and overall throughput

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  Explanation/Reference:

  The reason there is such a large range in the number of IOPS delivered by SSDs is the IOPS are truly dependent on the type of traffic the SC Series was designed to handle. The two biggest factors that will determine IOPS in an SSD environment are block size of the application and overall throughput.

  Reference: https://downloads.dell.com/manuals/common/sc-series-performance-availability-best-practices-dell-emc-4024-bp-sc_en-us.pdf

• Question 123:

  What is the recommended option when configuring Dell EMC PowerStore nodes for High Availability?

  A. Active/Active
  B. Active/Passive with AULA
  C. Synchronous Replication
  D. Active/Passive
  A. Active/Active

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  Explanation/Reference:

  Reference:https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h18157-dell-emc-powerstore-clustering-high-availability.pdf

• Question 124:

  Which Dell EMC Midrange solution is configured for block storage with a built-in hypervisor?

  A. Unity XT
  B. PowerStore X
  C. SC 9000
  D. PowerStore T
  B. PowerStore X

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  Explanation/Reference:

  The PowerStore X model configuration provides a hypervisor layer in addition to block storage. Reference:https://www.dell.com/support/manuals/en-pk/powerstore-9000/pwrstr-v12n/virtualization-architecture-and-configuration?guid=guid-cd3afd8a-aaba-43f5-b80c-c14b844b50b8andlang=en-us

• Question 125:

  What storage resources are affected with a refresh option on a Dell EMC PowerStore array?

  A. Thin clones and volumes only
  B. Snapshots, thin clones, and volumes
  C. Thin clones, volumes, and replicas
  D. Thin clones and snapshots only
  A. Thin clones and volumes only

• Question 126:

  Which NAS protocols does Dell PowerStore support?

  A. FTP, SMB, NFSv2, NFSv3, and FTPS
  B. FTPS, SMB, NFSv3, NFSv4, and FTP
  C. SMB, NFSv3, NFSv4p, FTP, and SFTP
  D. NFSv4, SMB, S3, FTP, and SFTP
  C. SMB, NFSv3, NFSv4p, FTP, and SFTP

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  Explanation/Reference:

  Dell PowerStore supports a variety of NAS protocols to provide file access to clients. These protocols include:

  SMB (Server Message Block): This protocol is used to provide file and printer sharing on Windows-based systems.

  NFSv3 (Network File System version 3): This is a standard protocol used to provide file access on UNIX-based systems.

  NFSv4 (Network File System version 4): This is the latest version of the NFS protocol and it provides enhanced security and improved performance over previous versions.

  FTP (File Transfer Protocol): This is a standard protocol used to transfer files between computers over a network.

  SFTP (Secure File Transfer Protocol): This is an extension of the FTP protocol that provides secure file transfer using SSH (Secure Shell) encryption.

• Question 127:

  A technical architect is designing a Dell Unity storage solution The customer has a monthly data access profile where block data is accessed infrequently The data is accessed frequently for a few days during month-end reporting

  Based on best practices which solution should the technical architect recommend?

  A. A single-tier solution using 10k drives
  B. An All-Flash solution using FAST VP and FAST Cache
  C. A hybrid solution using FAST VP and FAST Cache
  D. A hybrid solution using data progression
  C. A hybrid solution using FAST VP and FAST Cache

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  Explanation/Reference:

  Based on the customer's monthly data access profile, where block data is accessed infrequently but frequently during month-end reporting, the technical architect should recommend a hybrid solution using FAST VP and FAST Cache. FAST VP (Fully Automated Storage Tiering for Virtual Pools) is a feature that automatically tiers data across different types of storage media based on access patterns. With FAST VP, frequently accessed data will be automatically moved to faster storage media such as flash, while infrequently accessed data will be moved to slower, less expensive storage media such as disk. FAST Cache is a feature that increases the performance of Unity storage systems by caching frequently accessed data on flash storage. With this hybrid solution, the customer will have the best of both worlds: high-performance flash storage for frequently accessed data, and lower-cost disk storage for infrequently accessed data. This will help the customer to improve performance during month-end reporting and save costs for infrequently accessed data. It's important to note that this design should be evaluated based on the specific requirements, workloads and expected growth of the customer.

• Question 128:

  Which optional I/O Module card type is supported for both Dell PowerStore T and Dell PowerStore X?

  A. 25GbE
  B. 8 Gb Fibre Channel
  C. 10GbEBaseT
  D. 32 Gb Fibre Channel
  C. 10GbEBaseT

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  Explanation/Reference:

  Both Dell PowerStore T and Dell PowerStore X support the 10 GbE BaseT optional I/O module card type. This card provides 10 Gbps Ethernet connectivity and can be used to connect the storage array to a network. The other options are not supported by both models. 25 GbE and 32 Gb Fibre Channel are generally faster and used for high-performance systems, while 8 Gb Fibre Channel is an older standard, and not supported by Dell PowerStore T and Dell PowerStore X.

• Question 129:

  What final operation should be performed after adding a single drive to a Dell Powerstore array?

  A. Add it to an existing DRS
  B. Format the drive
  C. Back up the Keystore
  D. Verify drive operation
  D. Verify drive operation

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  Explanation/Reference:

  This ensures that the drive is properly connected and communicating with the array, and that it is functioning as expected. Additionally, the new drive should be added to an existing DRS(Drive Replacement Set) and if necessary, the keystore should be backed up and the drive should be formatted.

• Question 130:

  A company has a Dell Unity XT 880 at its Boston site providing file storage for a business production application The company has a second remote site 8 km (5 mi) away in Cambridge A third site is in New York (342 km (213 mi) from the Boston site)

  How can the same production data be protected against system outage with a zero RPO and a maximum of 15 minutes RPO data recovery?

  A. Synchronous replicate from Boston to Cambridge Asynchronous replicate from Boston to New York
  B. Synchronous replicate from Boston to Cambridge Synchronous replicate from Boston to New York
  C. Asynchronous replicate from Boston to Cambridge Asynchronous replicate from Cambridge to New York
  D. Synchronous replicate from Boston to Cambridge Synchronous replicate from Cambridge to New York
  B. Synchronous replicate from Boston to Cambridge Synchronous replicate from Boston to New York

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  Explanation/Reference:

  Synchronous replication will provide a zero RPO as all data is written to both the primary and secondary storage at the same time, which means any data written to the primary storage will be instantly available on the secondary storage. This configuration will ensure that the data is protected against system outage, and in case of any failure, the recovery time will be a maximum of 15 minutes as the data is already replicated to the secondary site.