EMC DES-1D12 Online Practice Questions and Exam Preparation

EMC DES-1D12 Online Questions & Answers

• Question 51:

  A Dell Unity XT hybrid flash array system is configured with FAST Cache to optimize data access for OLTP workloads. What level of data granularity is tracked and promoted to the secondary cache?

  A. 8KB
  B. 256KB
  C. 64 KB
  D. 128 KB
  A. 8KB

  ---

  Explanation/Reference:

  FAST Cache is an intelligent caching technology that optimizes data access for OLTP workloads by tracking and promoting data at the granularity of 8KB blocks. It uses a combination of flash memory and DRAM to store frequently accessed data, allowing the system to quickly access the most frequently used data, reducing latency and improving overall performance.

• Question 52:

  You are sizing a new Dell EMC SC Series array. Upon analyzing the Live Optics report, you find the current system has a peak throughput of 4687 MB. What is the minimum number of 10Gb iSCSI front-end ports required to meet the throughput needs?

  A. 8
  B. 10
  C. 12
  D. 16
  A. 8

  ---

  Explanation/Reference:

• Question 53:

  What provides data analytics for Dell EMC Midrange storage?

  A. eLab Advisor
  B. Unisphere Central
  C. DSM
  D. CloudIQ
  D. CloudIQ

  ---

  Explanation/Reference:

  Reference: https://advance.biz-tech-insights.com/whitepaper/h15387-cloudiq-top-reasons.pdf

• Question 54:

  What is the maximum capacity of a file system on a Dell Unity XT 380?

  A. 64 TB
  B. 32 TB
  C. 256 TB
  D. 128 TB
  C. 256 TB

  ---

  Explanation/Reference:

  The maximum capacity of a file system on a Dell Unity XT 380 can be up to 256 TB. This high capacity is possible due to the advanced storage features such as data reduction, data tiering and use of high-density drives. The file system capacity can be increased by adding more drives, and by configuring the storage pool and LUNs in a way that maximizes storage utilization and performance. It's important to note that this may vary depending on the specific version and software of the Dell Unity XT 380.

• Question 55:

  When designing a Dell EMC SC Series system, which factors regarding general performance are important to understand?

  A. Write size and latency
  B. Block size and read size
  C. Latency and queue depth
  D. Transport and queue depth
  C. Latency and queue depth

  ---

  Explanation/Reference:

  "Whether gathering information or designing a system, it is important to understand two commonly used terms: Latency and queue depth"

• Question 56:

  At what granularity are blocks deduplicated on a Dell EMC PowerStore array?

  A. 4 KB
  B. 8 KB
  C. 32 KB
  D. 64 KB
  A. 4 KB

  ---

  Explanation/Reference:

  https://www.delltechnologies.com/resources/en-us/asset/white-papers/products/storage/h18151-dell-emc-powerstore-data-efficiencies.pdf Deduplication uses algorithms to analyze, perform pattern detection, and attempts to store only a single instance of data. In general deduplication can work at the block, bit-level, or file level. In PowerStore, deduplication works at the block level at 4 KB granularity.

• Question 57:

  A customer has a Dell Unity XT 380F system with a single pool that is built from 24x 800 GB and 24x 1 6 TB SAS Rash 3 drives and 14x 400 SAS Flash 2 drives. How many drive partnership groups were used to build the dynamic pool?

  A. 3
  B. 1
  C. 2
  D. 4
  B. 1

  ---

  Explanation/Reference:

  In Dell Unity XT storage systems, a dynamic pool is built using drive partnership groups. A drive partnership group is a group of drives that are combined to create a pool. A drive partnership group can be made up of SAS, NL-SAS, or Flash drives. In this case, the customer has a single pool built from 24x 800 GB SAS Rash 3 drives and 24x 1 6 TB SAS Rash 3 drives, and 14x 400 SAS Flash 2 drives. All drives are SAS type, and it's only one partnership group.

• Question 58:

  Which Dell EMC Unity OE 5.0 enhancements improve asynchronous replication?

  A. NAS server mobility and Fan-out Replication
  B. GeoSync and NAS server mobility
  C. Cascade Replication and GeoSync
  D. Fan-out and Cascade Replication
  D. Fan-out and Cascade Replication

  ---

  Explanation/Reference:

  Dell EMC Unity OE version 5.0, asynchronously replicated file resources can also be configured in advanced replication topologies. This allows for configurations such as fan-out and cascading replication at the granularity of a NAS Server and its associated file resources. Reference:https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h17827-dell-emc-unity-operating-environment.pdf

• Question 59:

  Which Dell EMC Unity storage array models support NVMe?

  A. 380, 880, and 880F
  B. 680F, 880, and 880F only
  C. 680, 680F, 880, and 880F
  D. 380, 380F, and 480F
  C. 680, 680F, 880, and 880F

  ---

  Explanation/Reference:

  https://delltechnologies.techdata.nl/app/uploads/2019/02/dell-emc-unity-xt-selling-guide.pdf

• Question 60:

  What is the Dell EMC best practice for sizing and designing a Dell EMC SC Series solution?

  A. Front-end ports required for performance should always meet capacity needs
  B. Drive capacity should meet performance needs
  C. Size for performance first and capacity second
  D. Size for capacity; Data Progression should always meet performance needs
  C. Size for performance first and capacity second