PROFESSIONAL EXIN NEW CDCS EXAM FORMAT ARE LEADING MATERIALS & TRUSTABLE CDCS: EXIN EPI CERTIFIED DATA CENTRE SPECIALIST

Professional EXIN New CDCS Exam Format Are Leading Materials & Trustable CDCS: EXIN EPI Certified Data Centre Specialist

Professional EXIN New CDCS Exam Format Are Leading Materials & Trustable CDCS: EXIN EPI Certified Data Centre Specialist

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EXIN EPI Certified Data Centre Specialist Sample Questions (Q40-Q45):

NEW QUESTION # 40
What should be considered when installing overhead data cabling?

  • A. Copper data cabling should not be placed in metal cable trays.
  • B. All cabling should make sharp bends directly into the rack to avoid usage of additional space and blocking the airflow on top of the rack.
  • C. Optical fiber cabling should always be positioned on top of the copper cabling in the same cable tray to avoid damage to the sensitive optical fiber.
  • D. To maintain minimum separation from power and ensure that the fire detection and suppression systems are not hindered.

Answer: D

Explanation:
When installing overhead data cabling, it's crucial to maintain minimum separation from power cables to prevent electromagnetic interference. Additionally, cabling should be arranged so that it does not obstruct fire detection and suppression systems, allowing for proper sensor function and suppression agent dispersion in the event of a fire.
Detailed Explanation:
Separation between power and data cabling minimizes the risk of interference and helps ensure compliance with standards for signal integrity. Proper placement relative to fire suppression systems ensures that any smoke or heat can be effectively detected, and suppression agents can be evenly distributed without obstruction from cabling.
EPI Data Center Specialist References:
EPI guidelines emphasize maintaining adequate separation between power and data cables for safety and performance and ensuring cabling does not interfere with essential safety systems in data centers.


NEW QUESTION # 41
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. There will be more switches to manage.
  • C. You need a separate rack to install all your ToR (Top of Rack) switches.
  • D. A ToR (Top of Rack) switch has only optical interfaces.

Answer: B

Explanation:
A Top of Rack (ToR) design typically requires more switches because each rack has its own switch to manage network connections, as opposed to End of Row (EoR) or centralized designs, which consolidate switches. While ToR designs improve cabling efficiency and reduce latency, they also increase the number of switches, thus raising management complexity and potentially increasing capital and operational costs.
Detailed Explanation:
In a ToR setup, each rack's individual switch allows for quick access and streamlined cabling within the rack. However, this setup means more devices to configure, monitor, and maintain, which can increase administrative overhead and network management complexity.
EPI Data Center Specialist References:
EPI documentation notes that ToR designs can improve performance but also lead to increased management needs due to the higher switch count, making them less ideal in environments where simplified network management is prioritized.


NEW QUESTION # 42
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. Any cooling system can be efficient because the outside air temperature will not influence the temperature of the air intake of the ICT equipment
  • B. Standard air conditioning units, as spares might not be readily available
  • C. Airside economizer
  • D. Waterside economizer

Answer: C

Explanation:
In locations with consistently cold temperatures, such as above the Arctic Circle, an airside economizer is the most energy-efficient cooling solution. Airside economizers use cool outside air to lower indoor temperatures, reducing or even eliminating the need for mechanical cooling. Given the consistently low temperatures, this method maximizes energy efficiency by leveraging natural cooling.
Detailed Explanation:
Airside economizers are ideal in environments where outside temperatures are consistently low. By drawing in and filtering cold outdoor air, they directly cool the indoor environment, thereby reducing energy consumption significantly compared to traditional air conditioning. This cooling approach aligns with energy efficiency goals by minimizing mechanical cooling demands.
EPI Data Center Specialist References:
EPI recommends the use of airside economizers in cold climates to achieve high energy efficiency, as they allow data centers to capitalize on ambient conditions for cooling, aligning with sustainability and cost-saving practices.


NEW QUESTION # 43
Three data centers are benchmarked on facilities energy efficiency.
Data center A has achieved a PUE of 2.45.
Data center B has achieved a PUE of 1.20.
Data center C has achieved a PUE of 1.90.
Which of the data centers is operating at the highest facility efficiency?

  • A. PUE does not indicate efficiency
  • B. Data center B
  • C. Data center A
  • D. Data center C

Answer: C

Explanation:
A Power Usage Effectiveness (PUE) of 1.20 (achieved by Data Center B) indicates the highest facility efficiency among the three data centers. A lower PUE value signifies better energy efficiency, as it means that a greater proportion of the total energy consumed is used directly for IT equipment rather than for cooling, lighting, or other facility needs.
Detailed Explanation:
PUE is calculated as the ratio of total facility energy to IT equipment energy. A PUE close to 1.0 suggests that almost all the energy is dedicated to computing processes, with minimal overhead. With PUE values of 2.45, 1.20, and 1.90, Data Center B (1.20) operates most efficiently by devoting a higher percentage of its total energy to IT equipment.
EPI Data Center Specialist References:
The EPI curriculum emphasizes PUE as a key metric for data center efficiency, with lower values representing better performance. Achieving a PUE near 1.0 aligns with industry best practices for energy-efficient data center design and operation.


NEW QUESTION # 44
A computer room needs to be fitted out with a gas-based fire suppression system. The computer room will be a high-density data center with about 30% of the racks being closed circuit cooling blade-center racks.
Should the supplier of the fire suppression system be informed on the design of the racks?

  • A. Only when the rack height obstructs a potential fire suppression release point.
  • B. Yes, the design of the racks has an influence on the fire suppression system design.
  • C. Only when the racks might block access to the fire panel.
  • D. No, cooling and design of racks have no influence on the fire suppression system design.

Answer: B

Explanation:
The design and configuration of racks, particularly high-density and closed-circuit cooling racks, directly impact the fire suppression system design. Closed-circuit cooling racks, like blade-center racks, can affect airflow and potentially trap heat, influencing how fire suppression agents are distributed within the space. Therefore, it is essential to inform the fire suppression system supplier about the rack design to ensure effective coverage and proper agent distribution.
Detailed Explanation:
High-density racks can change how smoke and heat travel, which in turn affects fire detection and suppression. Closed racks with built-in cooling can isolate airflow, requiring adjustments in fire suppression design to ensure that suppression agents reach all necessary areas, including within enclosed spaces. The supplier may need to account for these factors to ensure proper protection coverage.
EPI Data Center Specialist References:
The EPI Data Center Specialist training underscores that fire suppression systems must be tailored to the specific environmental characteristics of the data center. The design of racks, particularly high-density configurations, should always be considered to ensure that suppression agents can effectively control a fire, even in contained rack spaces.


NEW QUESTION # 45
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