EMC EMC Certifications DES-1D12 Questions & Answers

• Question 101:

  What is a characteristic of single-tier Flash on Dell EMC SC Series arrays?

  A. Supports both write-intensive and read-intensive SSDs in the same tier

  B. Snapshot data is kept on Tier1 in RAID 10 to optimize performance

  C. Read only data is migrated to lower tiers when a snapshot is taken

  D. Supports either write-intensive or read-intensive SSDs in the same tier

  Correct Answer: D

  Reference: https://downloads.dell.com/manuals/common/sc-series-performance-availability-best-practices-dell-emc-4024-bp-sc_en-us.pdf (15)

• Question 102:

  For Dell EMC SC Series arrays, what is the minimum percentage of total system IOPS that should be applied to Tier 3 drives?

  A. 15%

  B. 20%

  C. 25%

  D. 100%

  Correct Answer: B

  "As a standard, tier 3 drives should encompass a minimum of 20% system IOPS potential."

• Question 103:

  What is a benefit of using a performance assessment tool?

  A. Retrieves workload metrics from all storage systems

  B. Provides performance statistics in a structured postgres database

  C. Retrieves the performance archives using the Unity Data Collection

  D. Provides automated performance statistics in chart and table format

  Correct Answer: D

  A performance assessment tool is used to evaluate the performance of storage systems and provide statistics that can be used to identify and troubleshoot performance issues. One of the benefits of using a performance assessment tool is that it provides automated performance statistics in chart and table format, making it easy to understand performance metrics and identify any potential issues. This allows the user to quickly identify and address any bottlenecks in the system, and make adjustments to improve performance.

• Question 104:

  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

  Correct Answer: C

  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 105:

  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

  Correct Answer: D

• Question 106:

  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

  Correct Answer: A

• Question 107:

  A database volume on a Dell PowerStore cluster has a Protection Policy that is applied with a single snapshot rule The policy takes a snapshot every hour and retains them for 48 hours The storage administrator must present a copy of the database volume to a test environment

  Which action does the storage administrator take to meet this requirement?

  A. Restore the snapshot to a new test volume

  B. Create a thin clone of the database volume and map it to the test host

  C. Create a new snapshot policy for the test volume

  D. Create a snapshot of the database volume and map it to the test host

  Correct Answer: B

  A thin clone is a writeable copy of a volume, which shares the same data blocks as the parent volume. This allows the administrator to provide a copy of the production database volume to the test environment without affecting the production data. It also allows to test the data without affecting the production data, and also it doesn't require additional storage space.

• Question 108:

  How are vVol datastores mounted in Dell EMC PowerStore storage during the creation of vVol datastores in the vSphere environment shared by ESXi hosts?

  A. Volume Groups

  B. Storage containers

  C. Storage Groups

  D. VMFS datastores

  Correct Answer: B

  A storage container is used to present vVol storage from a PowerStore cluster to vSphere. vSphere mounts the storage container as a vVol datastore and makes it available for VM storage. When a PowerStore cluster is used to provide VM storage, user VMs should be provisioned on the vVol datastores. The default storage container is mounted automatically on the nodes of the cluster.

• Question 109:

  When designing a Dell EMC Unity 480F solution, what is the maximum number of enclosures and drive slots, per bus?

  A. 10 enclosures and 250 drive slots

  B. 10 enclosures and 750 drive slots

  C. 3 enclosures and 240 drive slots

  D. 10 enclosures and 500 drive slots

  Correct Answer: A

  NOTE General DAE back-end bus configuration rules:

  Maximum number of enclosures per bus is 10.

  Maximum number of drive slots per bus is 250, up to specific system limitations for drive slots.

• Question 110:

  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

  Correct Answer: B

  (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.