Specialist – Implementation Engineers: 68 (DES-1423) - EMC

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Sample DES-1423 Exam Questions & Explanations

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Question #1 Verified Q&A
When reviewing the actual protection output of N+4/2, what does the number “4” represent?
A FEC stripe units per file system
B FEC stripe units per stripe
C Volume stripes per file system
D Hard drives used per stripe
Correct Answer: FEC stripe units per stripe
Explanation:
It's OneFS FEC protection nomenclature for our "hybrid" protection polices. More generally, it's written as: N+M/b<br />
<br />
where "N" is the number of data stripe units in a stripe, "M" is the number of FEC stripe units in a<br />
stripe, and "b" is the number of stripe units in a stripe which are allowed to reside on the same node.
Question #2 Verified Q&A
What impact can obsolete drive firmware have on an Isilon cluster?
A Increases runtime and cluster performance.
B Reduces administrative overhead and increases performance.
C Affects cluster performance or hardware reliability.
D Affects redundancy settings and FEC coding.
Correct Answer: Affects cluster performance or hardware reliability.
Question #3 Verified Q&A
What defines FEC link aggregation mode?
A Balances outbound traffic across all active ports in the aggregated link.
B Switches to the next interface when the primary interface becomes unavailable.
C Balances outgoing traffic based on hashed protocol header information that includes source and destination addresses.
D Balances outgoing traffic based on hashed protocol header information that includes source and destination addresses, and VLAN tag.
Correct Answer: Balances outgoing traffic based on hashed protocol header information that includes source and destination addresses.
Explanation:
References: 126 Isilon Administration and Management participant guide
Question #4 Verified Q&A
In Isilon OneFS, what is a characteristic of CoW with snapshots?
A Used for more substantial changes such as deletes.
B Used for small changes, inodes, and directories.
C Increases file fragmentation.
D Avoids the double write penalty.
Correct Answer: Used for small changes, inodes, and directories.
Explanation:
With copy on write, as the name suggests, a new write to HEAD results in the old blocks being copied out to the snapshot version first. Although this incurs a double write penalty, it results in less fragmentation of the HEAD file, which is better for cache prefetch, etc. Typically, CoW is most prevalent in OneFS and is primarily used for small changes, inodes and directories.
Question #5 Verified Q&A
Which OneFS networking option enables Isilon for DNS multitenant functionality?
A Subnet
B Groupnet
C Pool
D Access zone
Correct Answer: Groupnet
Explanation:
Groupnets are designed to enable multi-tenant DNS support per access zone.

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Our DES-1423 (Specialist – Implementation Engineers: 68) practice question bank currently includes 68 verified questions with comprehensive explanations.
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Yes, all EMC DES-1423 practice questions are regularly updated and verified against current exam objectives.
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