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Exin CDCS Exam Actual Questions

The questions for CDCS were last updated on Nov. 19, 2024.
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  • Viewing questions 1-4 out of 59 questions
 

Topic 1 - Exam A

Question #1 Topic 1

A 5kW (power consumption) server keeps crashing with the message ‘temperature too high’.
- The intake temperature is measured at 25 °C/77 °F and a relative humidity (RH) level of 50%.
- The exhaust temperature is 29 °C/84 °F and 45% RH.
- The raised floor is providing adequate amount of CFM/CMH at a reasonable velocity.
- The pressure under the raised floor is approximately 25 Pa/0.1 inch H20.
Analyze the situation and indicate what the most likely cause is for this server to crash.

  • A. Dust inside the server causing issues with convection-based heat transfer
  • B. The exhaust temperature is exceeding the ASHRAE recommended values
  • C. The raised floor pressure is too low and/or the raised floor tile % opening is not adequate
  • D. No cause could be determined as the CFM/CMH of the air conditioning equipment is not stated
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Correct Answer: A 🗳️

Question #2 Topic 1

What is the main disadvantage of using a ToR (Top of Rack) design?

  • A. A single ToR (Top of Rack) switch is more expensive than an EoR (End of Row) switch.
  • B. You need a separate rack to install all your ToR (Top of Rack) switches.
  • C. There will be more switches to manage.
  • D. A ToR (Top of Rack) switch has only optical interfaces.
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Correct Answer: C 🗳️

Question #3 Topic 1

The location of a data center is just above the Arctic Circle (North Pole). The outside air temperature is never above 21 °C/70 °F.
Taking energy efficiency as the highest priority, which cooling system should you recommend?

  • A. Standard air conditioning units, as spares might be not readily available
  • B. Any cooling system can be efficient, because the outside air temperature will not influence the temperature of the air intake of the ICT equipment
  • C. Waterside economizer
  • D. Airside economizer
Reveal Solution Hide Solution   Discussion  

Correct Answer: D 🗳️

Question #4 Topic 1

When are the wet bulb’s and dry bulb’s temperature identical?

  • A. When the dry bulb’s temperature is at the lowest allowable temperature for IT equipment as per the ASHRAE
  • B. When the dry bulb’s temperature is at the highest allowable temperature for IT equipment as per the ASHRAE
  • C. When the relative humidity is at the best practice value for relative humidity, being 50% RH
  • D. When the relative humidity is 100%
Reveal Solution Hide Solution   Discussion  

Correct Answer: D 🗳️

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