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CompTIA

CV0-002 · Question #573

A cloud administrator was testing a new application on a VM in the private cloud environment with the following requirements: - Disk IO read latency below 5ms - Write latency below or equal to 8ms…

The correct answer is B. The test was successful because 800s is the same as 8ms. The test results successfully meet all specified requirements, assuming the '800s' write latency is a typographical error for '8ms'. With this interpretation, read latency, write latency, IOPS, and overall CPU usage all fall within the acceptable thresholds.

Operations

Question

A cloud administrator was testing a new application on a VM in the private cloud environment with the following requirements:

  • Disk IO read latency below 5ms
  • Write latency below or equal to 8ms
  • Number of IOPS at least 5000
  • Overall CPU usage below 80%

The test results were:

  • Read latency 4ms
  • Write latency 800s
  • 6000 IOPS
  • CPU1 average 75%
  • CPU2 average 82%

Which of the following BEST reflects the test results?

Options

  • AThe test was not successful because the CPU2 usage was too high.
  • BThe test was successful because 800s is the same as 8ms.
  • CThe test was successful because the average CPU was below 80%.
  • DThe test was not successful because write latency was too high.

How the community answered

(46 responses)
  • A
    9% (4)
  • B
    72% (33)
  • C
    15% (7)
  • D
    4% (2)

Why each option

The test results successfully meet all specified requirements, assuming the '800s' write latency is a typographical error for '8ms'. With this interpretation, read latency, write latency, IOPS, and overall CPU usage all fall within the acceptable thresholds.

AThe test was not successful because the CPU2 usage was too high.

The overall CPU usage (average of 75% and 82%) is 78.5%, which is below the 80% requirement, so CPU usage was not too high.

BThe test was successful because 800s is the same as 8ms.Correct

The test results for read latency (4ms), IOPS (6000), and overall CPU average (78.5%) all meet their respective requirements. The question's correct answer implies that '800s' for write latency is a typo for '8ms', which would also meet the requirement of 'below or equal to 8ms', thus making the test successful across all criteria.

CThe test was successful because the average CPU was below 80%.

While the average CPU was below 80%, this choice only addresses one aspect of the test results and does not acknowledge the critical interpretation required for the write latency.

DThe test was not successful because write latency was too high.

This statement would only be true if '800s' was interpreted literally as 800 seconds; however, the correct answer indicates it should be read as '8ms', which is not too high.

Concept tested: Interpreting performance metrics and requirements

Topics

#performance metrics#latency#IOPS#CPU utilization

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