EMC E20-393 Online Practice Questions and Exam Preparation

EMC E20-393 Online Questions & Answers

• Question 1:

  When defining which resources on the destination system the replicated item will use for an asynchronous session, which settings must be provided?

  A. Replication Mode, RPO, and Replicate To
  B. Name, Pool, and Storage Provisioning
  C. Ethernet Port, Subnet/Prefix Length, and Gateway
  D. Management IP Address, User Name, and Password
  B. Name, Pool, and Storage Provisioning

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  Create a replication session Ensure that you have first created relevant replication interfaces and connections, and then you need the name, pool, storage provisioning, and tiering policy you want to use for the destination storage resource. The system will automatically created a destination storage resource as part of this process.

  References: https://www.emc.com/dam/uwaem/documentation/unity-p-replication-config.pdf (page 23)

• Question 2:

  What is the maximum recovery point objectives (RPOs) configurable when using Unity native asynchronous replication?

  A. Minimum = 1 minute Maximum = 60 minutes
  B. Minimum = 1 minute Maximum = 1440 minutes
  C. Minimum = 5 minutes Maximum = 60 minutes
  D. Minimum = 5 minutes Maximum = 1440 minutes
  D. Minimum = 5 minutes Maximum = 1440 minutes

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  References: https://www.dellemc.com/en-ie/documentation/unity-family/unity-p-replication-config/02-unity-rep-br-workflow.htm

• Question 3:

  How is encryption set for a Unity storage system?

  A. Clicking the "Mode" checkbox on the Manage Encryption page
  B. Selecting "Status" on the Manage Encryption page
  C. Automatically set at the factory
  D. First time the license is applied
  D. First time the license is applied

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  D@RE is included by default on Unity arrays and included in the Unity license file unless otherwise requested during ordering. Therefore, all that is needed to activate D@RE is to install the D@RE enabled license file. The license installation process is not specific to D@RE, and is required to be performed before using the array. When logging into Unisphere for the first time, license installation appears as a step of the Unisphere Configuration Wizard, prompting the administrator to install the license file obtained from EMC. If this license file includes D@RE functionality, D@RE will be enabled once the license file is installed successfully

  Note: Unity storage systems address sensitive data concerns through controller-based Data at Rest Encryption (D@RE), which encrypts stored data as it is written to disk. D@RE is a license controlled feature available by default on Unity storage systems, and, being designed to be largely invisible to administrative end users, requires almost no effort to enable or manage. Enabling the feature or backing up the encryption keys externally takes just seconds, and redundant keystore backups stored on array ensure that user data is always as available as it is secure.

• Question 4:

  What is the role of Protocol Endpoints in Dell EMC Unity VMware storage provisioning?

  A. Enable transparent host attach operations to Snapshots of VVol datastores
  B. Manage host IO workload balance between multiple paths to the VMware datastores
  C. Provide a write consistent view to the host when accessing multiple VMware datastores
  D. Establish a data path between the ESXi host and the respective VVol datastores
  B. Manage host IO workload balance between multiple paths to the VMware datastores

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  Reference: https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/h15091-dell-emc-unity-virtualization-integration.pdf

• Question 5:

  Where do the D@RE encryption/decryption functions occur in the Unity storage system?

  A. Host I/O Modules
  B. Storage Processor Cache
  C. SAS I/O Module
  D. Self-encrypting drives
  C. SAS I/O Module

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  Upon installation and activation of the feature, the following keys are generated by

  RSA BSAFE and persisted to the Lockbox:

  KEK Wrapping Key (KWK)

  Data Encryption Keys (DEKs) for all bound drives

  A new KEK is generated each time the array boots. The KEK is wrapped with the KWK and passed to the SAS controller during the system boot process. Using the persisted KWK, the SAS controller can decrypt the KEK.

  Incorrect Answers:

  D: Self-Encrypting Drive (SED) technology is another variation of D@RE which is widely used and offers similar functionality as CBE. However, with SEDs, you have to pay a premium on every drive and only certain drives are offered in SED form.

  References: https://www.emc.com/collateral/white-paper/h13296-dare-wp.pdf (page 8)

• Question 6:

  Which UnityVSA storage resource can be configured with Host I/O limits?

  A. NAS Server
  B. Pool
  C. File System
  D. LUN
  D. LUN

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  Host I/O limits is a feature which allows the user to control the amount of throughput and bandwidth consumed by block resources. This feature can be applied to LUNs, VMFS datastores, or attached snapshots.

• Question 7:

  What are characteristics of the file system Snapshot Copy operation?

  A. Parent can only be a read-only Snapshot Copy will be a read-only Snapshot Has an independent Retention Policy from the parent
  B. Parent can only be a read only Snapshot Copy will be a read/write Snapshot Inherits the parent Retention Policy
  C. Parent can be a read-only or a read/write Snapshot Copy will be a read/write Snapshot Inherits the parent Retention Policy
  D. Parent can be a read-only or read/write snapshot Copy will be a read-only Snapshot Has an independent Retention Policy from the parent
  B. Parent can only be a read only Snapshot Copy will be a read/write Snapshot Inherits the parent Retention Policy

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  Reference: https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/h15089-dell-emc-unity-snapshots-and-thin-clones.pdf

• Question 8:

  What is a connectivity rule for hosts that connect to multiple Unity systems?

  A. Must connect to all arrays using a single protocol.
  B. Can connect to different arrays with different protocols.
  C. CNA connections used with alternating protocols.
  D. iSCSI is required to connect a host to multiple arrays.
  C. CNA connections used with alternating protocols.

• Question 9:

  The preferred production interface is active. What does the Dell EMC Unity XT system do once a NAS Server starts outbound traffic to an external service?

  A. Selects interfaces based on advanced static routes
  B. Uses Packet Reflect for outbound communication
  C. Uses the active production interface
  D. Selects the shortest path available
  C. Uses the active production interface

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  Reference: https://www.dell.com/community/Unity/Unity-NAS-Server-Network-Interfaces/m-p/7116802

• Question 10:

  What is a consideration when managing Host I/O Limit polices?

  A. Only shared Host I/O Limit policies can be paused and resumed
  B. All policies are resumed when any single policy is resumed
  C. Each policy can be paused or resumed independently.
  D. All policies are paused if a single policy is paused.
  C. Each policy can be paused or resumed independently.