EMC E10-001 Online Practice Questions and Exam Preparation

EMC E10-001 Online Questions & Answers

• Question 211:

  What is an accurate statement about application virtualization?

  A. Avoids conflicts between different versions of the same application
  B. Runs applications with the help of underlying computing components
  C. Runs applications without requiring the use of cache memory
  D. Presents more memory to an application than is physically available
  A. Avoids conflicts between different versions of the same application

• Question 212:

  Click on the calculator icon in the upper left corner.

  When a service is described as "three 9s available", what is the approximate amount of downtime allowed per week?

  A. 10 seconds
  B. 10 minutes
  C. 10 hours
  D. 10 days
  B. 10 minutes

• Question 213:

  What describes a community cloud model?

  A. Cloud services are made available to the social community at no cost
  B. Cloud infrastructure is operated solely for an organization
  C. Cloud infrastructure is shared by organizations with shared concerns
  D. Organizations consume resources from two or more clouds
  C. Cloud infrastructure is shared by organizations with shared concerns

• Question 214:

  How many Domain IDs are reserved in the fabric in the Fibre Channel address space?

  A. 16
  B. 17
  C. 239
  D. 256
  B. 17

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  FC Addressing in Switched Fabric

  The number of RESERVED Domain IDs = 256 - 239 = 17

  An FC address is dynamically assigned when a node port logs on to the fabric. The FC address has a distinct format, as shown in the slide.

  The first field of the FC address contains the domain ID of the switch. A Domain ID is a unique number provided to each switch in the fabric.

  Although this is an 8-bit field, there are only 239 available addresses for domain ID because some addresses are deemed special and reserved for fabric management services. For example, FFFFFC is reserved for the name server, and

  FFFFFE is reserved for the fabric login service.

  

  EMC E10-001 Student Resource Guide. Module 5: Fibre Channel Storage Area Network (FC SAN)

• Question 215:

  What refers to an IT infrastructure's ability to function during its specified time of operations, based on business expectations?

  A. Information availability
  B. Disaster recovery
  C. Disaster restart
  D. Business agility
  A. Information availability

• Question 216:

  Which data deduplication method increases the chance of identifying duplicate data even when there is only a minor difference between two documents?

  A. Variable-length segment
  B. Single-instance
  C. File level
  D. Fixed-block
  A. Variable-length segment

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  Data Deduplication Methods

  File-level deduplication (also called single-instance storage) detects and removes redundant copies of identical files. It enables storing only one copy of the file; the subsequent copies are replaced with a pointer that points to the original file.

  File-level deduplication is simple and fast but does not address the problem of duplicate content inside the files. For example, two 10-MB PowerPoint presentations with a difference in just the title page are not considered as duplicate files,

  and each file will be stored separately.

  Subfile deduplication breaks the file into smaller chunks and then uses specialized algorithm to detect redundant data within and across the file. As a result, subfile deduplication eliminates duplicate data across files. There are two forms of

  subfile deduplication: fixedlength block and variable-length segment. The fixed-length block deduplication divides the files into fixed-length blocks and uses a hash algorithm to find the duplicate data. Although simple in design, fixed- length

  blocks might miss many opportunities to discover redundant data because the block boundary of similar data might be different. Consider the addition of a person's name to a document's title page. This shifts the whole document, and all the

  blocks appear to have changed, causing the failure of the deduplication method to detect equivalencies. In variable- length segment deduplication, if there is a change in the segment, the boundary for only that segment is adjusted, leaving the

  remaining segments unchanged.

  This method vastly improves the ability to find duplicate data segments compared to fixed-block.

  EMC E10-001 Student Resource Guide. Module 10: Backup and Archive

• Question 217:

  An application generates 4200 small random I/Os at peak workloads with a read/write ratio of

  2:1.

  What is the disk load at peak activity for a RAID 1/0 configuration?

  A. 2,800
  B. 5,600
  C. 8,400
  D. 11,200
  B. 5,600

• Question 218:

  What is a characteristic of cloud-optimized storage?

  A. Secure multitenancy
  B. Single access mechanism
  C. Server-centric
  D. Native source-based deduplication
  A. Secure multitenancy

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  Cloud-optimized storage Content-rich applications combined with the growth of unstructured data are challenging to manage with traditional approach of storing data at scale. This combination of massive growth, new information types, and the need to serve multiple locations and users around the world, has led to requirements for information storage and management at a global scale. Cloud-optimized storage is a solution to meet these requirements. It delivers scalable and flexible architecture that provides rapid elasticity, global access and storage capacity ondemand.

  It also addresses the constraints of rigid, mount-point based interaction between storage and consumer by presenting a singular access point to the entire storage infrastructure. It leverages a built-in multi-tenancy model and enables self-service, fully metered access to storage resources thereby delivers storage-as-a- service on a shared infrastructure. Cloud-optimized storage typically leverages object-based storage technology that uses customizable, value-driven metadata to drive storage placement, protection and lifecycle policies.

  Key characteristics of cloud-optimized storage solution are: Massively scalable infrastructure that supports large number of objects across a globally distributed infrastructure Unified namespace that eliminates capacity, location, and other file system limitations Metadata and policy- based information management capabilities that optimizes data protection, availability and cost, based on service levels Secure multitenancy that enables multiple applications to be securely served from the same infrastructure. Each application is securely partitioned and data is neither co-mingled nor accessible by other tenants Provide access through REST and SOAP web service APIs and file-based access using variety of client devices EMC E10-001 Student Resource Guide. Module 13: Cloud Computing

• Question 219:

  Which EMC block-level storage virtualization product enables hosts from two different data centers to access a single copy of data?

  A. VPLEX
  B. VMAX
  C. VNX
  D. Vblock
  A. VPLEX

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  EMC VPLEX EMC VPLEX is the next-generation solution for block-level virtualization and data mobility both within and across datacenters. The VPLEX appliance resides between the servers and heterogeneous storage devices. It forms a pool of distributed block storage resources and enables creating virtual storage volumes from the pool. These virtual volumes are then allocated to the servers. The virtual-to-physical- storage mapping remains hidden to the servers.

  VPLEX provides nondisruptive data mobility among physical storage devices to balance the application workload and to enable both local and remote data access. The mapping of virtual volumes to physical volumes can be changed dynamically by the administrator.

  VPLEX uses a unique clustering architecture and distributed cache coherency that enable multiple hosts located across two locations to access a single copy of data. VPLEX also provides the capability to mirror data of a virtual volume both within and across locations.

  This enables hosts at different data centers to access cache-coherent copies of the same virtual volume. To avoid application downtime due to outage at a data center, the workload can be moved quickly to another data center. Applications continue accessing the same virtual volume and remain uninterrupted by the data mobility.

  The VPLEX family consists of three products: VPLEX Local, VPLEX Metro, and VPLEX Geo. EMC VPLEX Local delivers local federation, which provides simplified management and nondisruptive data mobility across heterogeneous arrays within a data center. EMC VPLEX Metro delivers distributed federation, which provides data access and mobility between two VPEX clusters within synchronous distances that support round-trip latency up to 5 ms. EMC VPLEX Geo delivers data access and mobility between two VPLEX clusters within asynchronous distances (that support round-trip latency up to 50 ms). EMC E10- 001 Student Resource Guide. Module 5: Fibre Channel Storage Area Network (FC SAN)

• Question 220:

  A careful analysis of financial benefits provides a clear picture about the cost savings in cloud adoption. Which two factors should the analysis compare?

  A. ROI and CAPEX
  B. CAPEX and OPEX
  C. TCO and SLA
  D. TCO and ROI
  D. TCO and ROI

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  Financial Advantage A careful analysis of financial benefits provides a clear picture about the cost-savings in adopting the cloud. The analysis should compare both the Total Cost of Ownership (TCO) and the Return on Investment (ROI) in the cloud and non cloud environment and identify the potential cost benefit. While calculating TCO and ROI, organizations and individuals should consider the expenditure to deploy and maintain their own infrastructure versus cloud adoption costs. While calculating the expenditures for owning infrastructure resources, organizations should include both the capital expenditure (CAPEX) and operation expenditure (OPEX). The CAPEX includes the cost of servers, storage, OS, application, network equipment, real estate, and so on. The OPEX includes the cost incurred for power and cooling, personnel, maintenance, backup, and so on. These expenditures should be compared with the operation cost incurred in adopting cloud computing. The cloud adoption cost includes the cost of migrating to the cloud, cost to ensure compliance and security, and usage or subscription fees. Moving applications to the cloud reduces CAPEX, except when the cloud is built on-premise. EMC E10-001 Student Resource Guide. Module 13: Cloud Computing