EMC E10-001 prüfung

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Exam Code: E10-001
Prüfungsname: Information Storage and Management Exam Version 2
Aktulisiert: 05-08-2015, E10-001 Antworten
Nummer: 344 Q&As

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E10-001 Information Storage and Management Version 2 Exam
OverviewThis exam is a qualifying exam for the EMC Information Storage Associate v2 (EMCISA)certification. The EMC Information Storage Associate (EMCISA) certification is a prerequisite Associate level certification for the following EMC Proven Professional tracks:Cloud Architect (EMCCA), Data Center Architect (EMCDCA), Storage Administrator(EMCSA), Technology Architect (EMCTA), Implementation Engineer (EMCIE), and Platform Engineer (EMCPE).

This exam focuses on information storage and management in classic, virtualized and cloud environments. It includes data center key elements, intelligent storage systems,storage networking technologies, and various business continuity options – along with security and management of a storage infrastructure. It also covers various aspects of cloud computing. A limited number of questions refer to product examples that are used in the training to reinforce the knowledge of technologies and concepts.
NO.1 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
Answer: C

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NO.2 Which process minimizes the exposure to a loss of uncommitted cached data when there is a
power failure?
A. Cache vaulting
B. Cache mirroring
C. Low watermarking
D. Prefetching
Answer: A

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Explanation:
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

NO.3 How is the internal transfer rate of disk drives defined?
A. Speed at which data moves from the read/write head to the platter
B. Speed at which data moves from a platter's surface to the internal buffer
C. Speed at which data moves from internal buffer to the host interface
D. Speed at which data moves from the innermost cylinder to the read/write head
Answer: B

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NO.4 Which NAS backup environment transfers data to be backed up over a private backup
network?
A. NDMP three-way
B. NDMP two-way
C. Server-based
D. Serverless
Answer: A

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NO.5 Which component of an archiving solution is responsible for scanning data that can be
archived based on a policy?
A. Archiving agent
B. Archiving server
C. Archiving policy server
D. Archiving storage device
Answer: A

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NO.6 What is a characteristic of asynchronous remote replication?
A. Only the last update is transmitted if there are multiple writes to the same location in the buffer
B. Writes are committed to the target before being committed to the source
C. Reads are always serviced from the target replica
D. Distance between the two sites is restricted to less than 200 km
Answer: A

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NO.7 In a copy on first access (CoFA) technique, when is data copied from the source to the target?
A. All writes are issued to a location on the source
B. All writes are issued to a location on the target
C. A read or write is issued for the first time to a location on the target
D. A read is issued for the first time from a location on the source
Answer: C

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NO.8 In a virtualized environment, which method enables a virtual machine to be rolled back in case
of a logical corruption to the virtual machine?
A. Virtual volume replication
B. VM snapshot
C. Storage array volume replication
D. VM clone
Answer: B

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