E20-555 Exam Details

  • Exam Code
    :E20-555
  • Exam Name
    :Isilon Solutions and Design Specialist for Technology Architects
  • Certification
    :EMC Certifications
  • Vendor
    :EMC
  • Total Questions
    :344 Q&As
  • Last Updated
    :Jul 08, 2026

EMC E20-555 Online Questions & Answers

  • Question 41:

    You have been tasked with designing a solution for a company that wants to logically separate access to their Isilon storage by department. Each of their major internal departments currently uses different Active Directory authentication providers. In addition, they want to provide Isilon storage access to these departments while maintaining their authentication separation.

    Which feature will provide this functionality?

    A. Access Zones
    B. Network Segmentation
    C. Multi-Homing
    D. VLAN Trunking

  • Question 42:

    A customer is inquiring about expanding their primary cluster consisting of six S-Series nodes in order to improve performance. They have a second cluster with 11 X-Series nodes. Both clusters leverage 1GbE, but the customer recently installed a 10GbE network that can be utilized. They also have multiple Fibre Channel SAN arrays in their environment.

    They have a variety of workloads on each cluster and are in the process of determining which workloads belong on which cluster. They have discovered that one of the workloads- a SQL database that resides on the X-Series node cluster - is experiencing timeouts due to latency. The database vendor has suggested limiting latency to 5ms or less to eliminate these timeouts.

    How do you advise the customer?

    A. Consider migrating data from Isilon to one of their SAN platforms or proposing a new solution to handle the performance requirements of SQL.
    B. Merge the S-Series nodes and X-Series nodes into one cluster, upgrade the 1GbE to 10GbE, and leverage SmartPools to allow for the cluster to determine where data should reside.
    C. Suggest the customer consider leveraging SSDs in the new nodes they purchase and GNA to boost the performance of each cluster.
    D. Recommend they increase the amount of DRAM in the cluster or consider an Accelerator node in order to increase the amount of cache in their cluster.

  • Question 43:

    A customer has 10 nodes in a cluster using N+2 protection. What is the minimum number of nodes required to be online and in communication with one another to satisfy quorum?

    A. 4
    B. 5
    C. 6
    D. 7

  • Question 44:

    A telecommunications company has a substantial amount of data. This data is being created by network elements within their environment.

    The company wants to change the way the network elements Call Detail Records (CDR) are stored and analyzed. The existing infrastructure consolidates all of the CDRs into a table structure, and then ingests them into a large database. Once ingested, a query engine accesses the database and performs analysis on these files. The system is functional; however, since the amount of CDRs generated will increase exponentially over the next year, the company is open to alternatives for storing and analyzing these records.

    In evaluating alternatives, the key requirements are to reduce cost, the amount of storage, and the amount of time to analyze the data. The customer would like to use Hadoop to analyze the CDRs.

    After you have conducted an assessment of the workflow, you have recommended an Isilon Cluster to work within the Hadoop environment.

    Considering the customer's requirements, which is the best node type for the Isilon cluster?

    A. NL400 with 48GB RAM and no SSDs per node
    B. X400 with 96GB of RAM and no SSDs per node
    C. X400 with 24GB RAM and 1.6TB of SSD per node
    D. X200 with 24GB of RAM and 1.2TB of SSD per node

  • Question 45:

    Where is caching for disk blocks staged on an Isilon node?

    A. L2
    B. CPU
    C. L1 D. RAID

  • Question 46:

    How is the journal protected in Gen 6 hardware?

    A. Identical copy is maintained on all nodes of the cluster
    B. Identical copy is maintained on both nodes of each node pair
    C. Each node has a mirrored M.2 vault
    D. Each node has a mirrored write cache

  • Question 47:

    A customer has a data retention period of three years. They want a solution in which files cannot be deleted, changed, or modified. Which Isilon SmartLock version should they implement?

    A. Compliance version
    B. Standard version No WORM
    C. Enterprise version
    D. Standard version with WORM

  • Question 48:

    Which Isilon feature increases available space by consolidating copies of identical blocks of data?

    A. SmartDedupe
    B. SmartQuotas
    C. Compliance
    D. FlexProtect

  • Question 49:

    During a write process in OneFS 8.0, from which cache are blocks copied to disk?

    A. L3
    B. L2
    C. Endurant
    D. L1

  • Question 50:

    You are helping a customer create a cost-effective Isilon solution. The customer environment includes high IOPS-intensive, random access file-based applications. Which Isilon storage node type will meet the customer's needs?

    A. S-Series
    B. NL-Series
    C. X-Series
    D. Performance Accelerator

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