EMC E10-001 Online Practice Questions and Exam Preparation

EMC E10-001 Online Questions & Answers

• Question 321:

  What describes a hybrid cloud?

  A. Composed of distinct clouds that are bound together by standardized or proprietary technology
  B. Composed of two or more distinct data centers that enable data and application portability
  C. Combination of two distinct cloud infrastructures (on-premise and externally-hosted) that are managed together
  D. Combination of a private cloud and a public cloud that are owned, managed, and operated by a single organization
  A. Composed of distinct clouds that are bound together by standardized or proprietary technology

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  Hybrid Cloud

  

  In a hybrid cloud model, the cloud infrastructure is a composition of two or more distinct cloud infrastructures (private, community, or public) that remain unique entities, but are bound together by standardized or proprietary technology that enables data and application portability (example, cloud bursting for load balancing between clouds). The hybrid model allows an organization to deploy less critical applications and data to the public cloud, leveraging the scalability and cost-effectiveness of the public cloud. The organization's mission-critical applications and data remain on the private cloud that provides greater security. EMC E10-001 Student Resource Guide. Module 13: Cloud Computing

• Question 322:

  What is an advantage of using content addressed storage as an archival solution?

  A. Ensures content authenticity and integrity
  B. Supports location independence using different content IDs for an object
  C. Enables the ability to reuse tapes for storing archive data
  D. Enables modification of archived data
  A. Ensures content authenticity and integrity

• Question 323:

  In an FCIP environment, which switch-specific feature helps to tunnel FC fabrics through an IP network?

  A. Fibre Channel Routing Services
  B. Bit and Frame Synchronization
  C. Enhanced Transmission Selection
  D. Upper Layer Protocol Mapping
  A. Fibre Channel Routing Services

• Question 324:

  What is a characteristic of unified storage?

  A. Supports multiple protocols for data access and managed through a single management interface
  B. Supports a common protocol for data access and managed through a unified management interface
  C. Provides compute, storage, and network virtualization products in one solution
  D. Stores all data in the form of objects and managed through a unified management interface
  A. Supports multiple protocols for data access and managed through a single management interface

• Question 325:

  What is the RAID 5 write penalty for random, small write I/Os?

  A. 1
  B. 2
  C. 4
  D. 6
  C. 4

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  RAID Impacts on Performance

  

  EMC E10-001 Student Resource Guide. Module 3: Data Protection - RAID

• Question 326:

  Which fabric service is responsible for distributing SW-RSCNs to every other switch in a Fibre Channel SAN?

  A. Fabric controller
  B. Fabric login server
  C. Name server
  D. Management server
  A. Fabric controller

• Question 327:

  What is a type of an active attack on an IT infrastructure?

  A. Attempt to modify information for malicious purposes
  B. Attempt to leak the data from the storage system
  C. Attempt to gain unauthorized access into the system
  D. Attempt to gain access to data in transit
  A. Attempt to modify information for malicious purposes

• Question 328:

  What is an accurate statement about a gateway NAS solution?

  A. NAS head and storage are managed independently
  B. Consolidates file-level and block-level access on a single storage platform
  C. Provides integrated management for both NAS head and storage
  D. Creates a single file system that runs on all NAS heads
  A. NAS head and storage are managed independently

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  A gateway NAS device consists of one or more NAS heads and uses external and independently managed storage. Similar to unified NAS, the storage is shared with other applications that uses block-level I/O. Management functions in this type of solution are more complex than those in a unified NAS environment because there are separate administrative tasks for the NAS head and the storage. A gateway solution can use the FC infrastructure, such as switches and directors for accessing SAN-attached storage arrays or direct-attached storage arrays. The gateway NAS is more scalable compared to unified NAS because NAS heads and storage arrays can be independently scaled up when required. For example, NAS heads can be added to scale up the NAS device performance. When the storage limit is reached, it can scale up, adding capacity on the SAN, independent of NAS heads. Similar to a unified NAS, a gateway NAS also enables high utilization of storage capacity by sharing it with the SAN environment.

  EMC E10-001 Student Resource Guide. Module 7: Network-Attached Storage (NAS)

• Question 329:

  An organization plans to deploy a deduplication solution by retaining their legacy backup application. They are concerned about the application servers' performance and long backup window during backup.

  Which deduplication solution(s) should be recommended to the organization?

  A. Post-process
  B. Inline
  C. Variable-length segment and source-based
  D. Fixed-length block and source-based
  A. Post-process

• Question 330:

  What is the name of the drive sub-assembly which contains the platters and read/write heads?

  A. ATA
  B. SATA
  C. HDA
  D. IDE
  C. HDA

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  Disk Drive Components

  

  The key components of a hard disk drive are platter, spindle, read-write head, actuator arm assembly, and controller board. I/O operations in a HDD is performed by rapidly moving the arm across the rotating flat platters coated with magnetic particles. Data is transferred between the disk controller and magnetic platters through the read-write (R/W) head which is attached to the arm. Data can be recorded and erased on magnetic platters any number of times. Platter: A typical HDD consists of one or more flat circular disks called platters. The data is recorded on these platters in binary codes (0s and 1s). The set of rotating platters is sealed in a case, called Head Disk Assembly (HDA). A platter is a rigid, round disk coated with magnetic material on both surfaces (top and bottom). The data is encoded by polarizing the magnetic area, or domains, of the disk surface. Data can be written to or read from both surfaces of the platter. The number of platters and the storage capacity of each platter determine the total capacity of the drive.

  Spindle: A spindle connects all the platters and is connected to a motor. The motor of the spindle rotates with a constant speed. The disk platter spins at a speed of several thousands of revolutions per minute (rpm). Common spindle speeds are 5,400 rpm, 7,200 rpm, 10,000 rpm, and 15,000 rpm. The speed of the platter is increasing with improvements in technology; although, the extent to which it can be improved is limited.

  Read/Write Head: Read/Write (R/W) heads, read and write data from or to platters. Drives have two R/W heads per platter, one for each surface of the platter. The R/W head changes the magnetic polarization on the surface of the platter when writing data. While reading data, the head detects the magnetic polarization on the surface of the platter. During reads and writes, the R/W head senses the magnetic polarization and never touches the surface of the platter. When the spindle is rotating, there is a microscopic air gap maintained between the R/W heads and the platters, known as the head flying height. This air gap is removed when the spindle stops rotating and the R/W head rests on a special area on the platter near the spindle. This area is called the landing zone. The landing zone is coated with a lubricant to reduce friction between the head and the platter. The logic on the disk drive ensures that heads are moved to the landing zone before they touch the surface. If the drive malfunctions and the R/W head accidentally touches the surface of the platter outside the landing zone, a head crash occurs. In a head crash, the magnetic coating on the platter is scratched and may cause damage to the R/W head. A head crash generally results in data loss.

  Actuator Arm Assembly: R/W heads are mounted on the actuator arm assembly, which positions the R/W head at the location on the platter where the data needs to be written or read. The R/W heads for all platters on a drive are attached to one actuator arm assembly and move across the platters simultaneously.

  Drive Controller Board: The controller is a printed circuit board, mounted at the bottom of a disk drive. It consists of a microprocessor, internal memory, circuitry, and firmware. The firmware controls the power to the spindle motor and the speed of the motor. It also manages the communication between the drive and the host. In addition, it controls the R/W operations by moving the actuator arm and switching between different R/W heads, and performs the optimization of data access. EMC E10-001 Student Resource Guide. Module 2: Data Center Environment