Learning CDCS Mode - 100% Useful Questions Pool

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EXIN CDCS Exam Syllabus Topics:

TopicDetails
Topic 1
  • Designing and Implementing a Data Centre: In this module, the exam assesses the knowledge of Exin data center professionals tasked with the design and implementation of data centers. Candidates will learn the key principles of creating an efficient data center layout, including considerations for scalability, redundancy, and security.
Topic 2
  • Data Centre Environmental Considerations and Efficiency: This section evaluates the proficiency of data center professionals in addressing environmental factors and promoting efficiency within data center operations. The target audience, including data center managers and engineers, will be tested on their ability to identify and implement measures that enhance energy efficiency, cooling management, and sustainable practices.
Topic 3
  • Data Centre Life Cycle and Standards: This section of the exam measures the skills of data center professionals and covers the various stages involved in the life cycle of a data center, from planning and design to implementation and decommissioning.

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2026 Learning CDCS Mode | Professional EXIN CDCS: EXIN EPI Certified Data Centre Specialist 100% Pass

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EXIN EPI Certified Data Centre Specialist Sample Questions (Q12-Q17):

NEW QUESTION # 12
The air intake of the mission-critical server at the top of the rack is measuring 25 °C/77 °F.
Is this acceptable?

Answer: B

Explanation:
An air intake temperature of 25 °C (77 °F) at the top of the rack is acceptable according to data center standards and guidelines, such as those from ASHRAE. This temperature falls within the recommended range for inlet temperatures, which is typically between 18°C (64°F) and 27°C (81°F).
Detailed Explanation:
ASHRAE standards provide guidelines on acceptable temperature ranges for air intake in data centers to balance cooling efficiency and equipment safety. A temperature of 25°C is within the recommended operational range, allowing data centers to optimize energy efficiency while maintaining safe conditions for IT equipment.
EPI Data Center Specialist References:
EPI guidelines align with ASHRAE recommendations for server intake temperatures, confirming that 25°C is within acceptable limits for most mission-critical equipment. This ensures the data center maintains an efficient and reliable environment.


NEW QUESTION # 13
Do all residual current devices (RCDs) use the same operating principle?

Answer: D

Explanation:
Residual current protection has evolved:
* ELCB (Earth Leakage Circuit Breaker): Older type; voltage-operated. It trips when voltage develops between earth and exposed metal.
* RCD/RCCB (Residual Current Device/Circuit Breaker): Current-operated. It detects imbalance between live and neutral conductors (indicating leakage current to earth).
Modern data centers use RCDs/RCCBs exclusively, since ELCBs are obsolete and unreliable if multiple earth connections exist. Thermal-magnetic breakers (D) provide overcurrent protection, not earth leakage.
Thus, not all residual current devices are based on the same principle.
References: IEC 61008, IEC 61009 (RCCB/RCD definitions), IEC 60364 (Electrical Installations - Protective Measures).


NEW QUESTION # 14
The temperature in the computer room is increased from 18 °C (64 °F) to 27 °C (81 °F). What is the impact on the amount of gas required to suppress a fire assuming a halocarbon agent?

Answer: D

Explanation:
Design concentrations for halocarbons (e.g., FM-200/HFC-227ea, Novec 1230) increase with ambient temperature; higher temperature # higher minimum extinguishing concentration # more agent mass.
References: NFPA 2001 (Clean Agent Fire Extinguishing Systems) §5.4 & Annex A (temperature correction for halocarbons); ISO 14520-1 §5.4.


NEW QUESTION # 15
A data center requires an audit to find out whether it conforms with ANSI/TIA-942 Rated-3 (concurrently maintainable).
Will the network architecture be part of this audit?

Answer: A

Explanation:
For a Rated-3 data center, network architecture is indeed a key component of the audit under ANSI/TIA-942. This rating requires concurrent maintainability across all systems, including telecommunications infrastructure. The network architecture must therefore meet specific redundancy and reliability standards to ensure uninterrupted operations during maintenance or failure of any single component.
Detailed Explanation:
Rated-3 requirements extend beyond electrical and mechanical systems to include network architecture. This ensures that telecommunications systems are also designed for concurrent maintainability, thus contributing to overall uptime and resilience.
EPI Data Center Specialist References:
EPI endorses comprehensive assessments for Rated-3 facilities, emphasizing that network systems must meet standards for redundancy and concurrent maintainability, which align with ANSI/TIA-942's holistic approach to data center reliability.


NEW QUESTION # 16
Should aerosol cleaning solutions be used in the computer room?

Answer: C

Explanation:
Aerosol sprays release particulates and residues into the environment, which can contaminate sensitive ICT equipment. Such contamination accelerates corrosion, interferes with airflow, and increases particulate levels beyond ASHRAE recommended limits.
Proper cleaning should use HEPA-filtered vacuum systems or dry wipes, not aerosols. Even odor control aerosols are disallowed in critical rooms.
Therefore, aerosol cleaning solutions must never be used.
References: ASHRAE TC 9.9 "Contamination Guidelines," NFPA 75 §8.4.


NEW QUESTION # 17
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