EMC E10-001 Online Practice Questions and Exam Preparation

EMC E10-001 Online Questions & Answers

• Question 281:

  Which aspect of monitoring will allow you to prevent a file system from running out of space?

  A. Array Capacity
  B. Array Health
  C. Server Capacity
  D. Server Health
  C. Server Capacity

• Question 282:

  What is a component of an FCoE switch?

  A. Ethernet Bridge
  B. Host Bus Adapter
  C. Converged Network Adapter
  D. FCIP Forwarder
  A. Ethernet Bridge

• Question 283:

  Which benefit is provided by EMC PowerPath?

  A. Dynamic load balancing
  B. Deduplication of network traffic
  C. Multiplexing host traffic
  D. Segmentation of fabric to create VSANs
  A. Dynamic load balancing

• Question 284:

  Which NAS implementation requires separate management of the NAS head and the storage?

  A. Gateway
  B. Scale-out
  C. Unified
  D. Integrated
  A. Gateway

• Question 285:

  What is a benefit when a node is added to a scale-out NAS cluster?

  A. Increased cluster performance
  B. Reduced capital expenditure
  C. Simplified cluster management
  D. Decreased data duplication
  A. Increased cluster performance

• Question 286:

  How can the loss of uncommitted cached data be minimized when there is a cache failure?

  A. Cache vaulting
  B. Cache striping
  C. Cache flushing
  D. Cache mirroring
  D. Cache mirroring

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  Cache Data Protection Cache is volatile memory, so a power failure or any kind of cache failure will cause loss of the data that is not yet committed to the disk. This risk of losing uncommitted data held in cache can be mitigated using cache mirroring and cache vaulting: Cache mirroring: Each write to cache is held in two different memory locations on two independent memory cards. If a cache failure occurs, the write data will still be safe in the mirrored location and can be committed to the disk. Reads are staged from the disk to the cache; therefore, if a cache failure occurs, the data can still be accessed from the disk. Because only writes are mirrored, this method results in better utilization of the available cache. In cache mirroring approaches, the problem of maintaining cache coherency is introduced. Cache coherency means that data in two different cache locations must be identical at all times. It is the responsibility of the array operating environment to ensure coherency. Cache vaulting: The risk of data loss due to power failure can be addressed in various ways: powering the memory with a battery until the AC power is restored or using battery power to write the cache content to the disk. If an extended power failure occurs, using batteries is not a viable option. This is because in intelligent storage systems, large amounts of data might need to be committed to numerous disks, and batteries might not provide power for sufficient time to write each piece of data to its intended disk. Therefore, storage vendors use a set of physical disks to dump the contents of cache during power failure. This is called cache vaulting and the disks are called vault drives. When power is restored, data from these disks is written back to write cache and then written to the intended disks.

  EMC E10-001 Student Resource Guide. Module 4: Intelligent Storage System

• Question 287:

  What is a key benefit of virtualization?

  A. Improved resource utilization
  B. Improved performance
  C. Enhanced interoperability
  D. Unlimited resource scaling
  A. Improved resource utilization

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  Need for Compute Virtualization

  

  EMC E10-001 Student Resource Guide. Module 2: Data Center Environment

• Question 288:

  A customer wants to connect iSCSI-enabled hosts to an existing Fibre Channel (FC) storage array. Which networking device enables the connectivity between the host and the storage array?

  A. iSCSI gateway
  B. FCIP bridge
  C. FC gateway
  D. IP router
  A. iSCSI gateway

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  iSCSI Topologies: Bridged iSCSI

  

  Bridged topology enables the coexistence of FC with IP by providing iSCSI-to-FC bridging functionality. Figure in the slide illustrates an iSCSI host connectivity to an FC storage array. In this case, the array does not have any iSCSI ports. Therefore, an external device, called a gateway or a multiprotocol router, must be used to facilitate the communication between the iSCSI host and FC storage. The gateway converts IP packets to FC frames and vice versa. The bridge devices contain both FC and Ethernet ports to facilitate the communication between the FC and IP environments. In bridged iSCSI implementation, the iSCSI initiator is configured with the gateway's IP address as its target destination. On the other side, the gateway is configured as an FC initiator to the storage array. EMC E10-001 Student Resource Guide. Module 6: IP SAN and FCoE

• Question 289:

  What is a benefit of cloud computing over traditional computing?

  A. Reduces the time to provision and deploy new applications
  B. Eliminates consumer's IT operational expenditure
  C. Enables the use of proprietary APIs to access IT resources
  D. Lowers migration cost and prevents vendor lock-in
  A. Reduces the time to provision and deploy new applications

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  Benefits of Cloud Computing

  Cloud computing offers the following key benefits:

  Reduced IT cost: Cloud services can be purchased based on pay-per-use or subscription pricing. This reduces or eliminates consumer's IT capital expenditure (CAPEX).

  Business agility:

  Cloud computing provides the capability to allocate and scale computing capacity quickly. Cloud can reduce the time required to provision and deploy new applications and services from months to minutes.

  This enables businesses to respond more quickly to market changes and reduce time-to-market.

  Flexible scaling: Cloud computing enables consumers to scale up, scale down, scale out, or scale in the demand for computing resources easily. Consumers can unilaterally and automatically scale computing resources without any

  interaction with cloud service providers. The flexible service provisioning capability of cloud often provides a sense of unlimited scalability to the cloud service consumers.

  High availability: Cloud computing has the ability to ensure resource availability at varying levels depending on the consumer's policy and priority. Redundant infrastructure components (servers, network paths, and storage equipment, along

  with clustered software) enable fault tolerance for cloud deployments. These techniques can encompass multiple data centers located in different geographic regions, which prevents data unavailability due to regional failures. EMC E10-001

  Student Resource Guide. Module 13:

  Cloud Computing

• Question 290:

  What are the key components of an intelligent storage system?

  A. Front-end, cache, back-end, and physical disks
  B. Host, connectivity, back-end, and storage array
  C. Switch, ports, back-end, and physical disks
  D. Host, LUNs, cache, and physical disks
  A. Front-end, cache, back-end, and physical disks