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Exin CDCS Exam Questions
- Topic 1: 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.
- Topic 2: 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 3: 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.
Free Exin CDCS Exam Actual Questions
Note: Premium Questions for CDCS were last updated On Oct. 26, 2026 (see below)
What is the advantage of using Multi-fiber Push-On (MPO) connectors?
MPO connectors are multi-fiber connectors that support 12, 24, or more fibers in a single connector. Their key advantage is enabling parallel optics---where multiple fibers transmit simultaneously. This makes them ideal for 40GBASE-SR4 and 100GBASE-SR10 Ethernet links.
With OM4 or OM5 fiber, MPO cabling supports short-reach high-speed links in modern data centers.
Option A is incorrect; MPO works with OM3/OM4/OM5.
Option C is misleading; all connectors degrade with repeated use.
Option D is false because MPO is optical-only.
The real advantage is parallel multi-fiber transmission in one connector, simplifying cabling for high-speed networking.
What is the floor loading requirement for a Rated-3 data center according to ANSI/TIA-942?
ANSI/TIA-942 specifies minimum floor live load capacities based on Rated levels:
Rated-1/2: ~7.2--8.4 kPa
Rated-3: 12 kPa
Rated-4: 15 kPa
These values ensure raised floors can support racks, cabling trays, cooling units, and maintenance loads without structural compromise. For Rated-3, concurrent maintainability requires higher floor robustness to handle additional infrastructure.
Therefore, the correct requirement is 12 kPa.
Given: A = attenuation in dB, R = real measured value, M = maximum acceptable value. Which formula should be used to calculate the required attenuation factor of EMF shielding material?
Attenuation is the logarithmic ratio between input and output signals. For power, we use 10 log; for voltage or current, 20 log. Since EMF shielding is measured as field strength (V/m or A/m), power relationship is proportional to the square of field. Thus the correct attenuation calculation for shielding effectiveness is:
where:
M = maximum permissible field strength
R = measured field strength after shielding
This ensures the shield reduces field intensity to below allowable limits.
The building requires sprinklers and is equipped with a wet-pipe system. What action should you recommend for the computer room?
NFPA 75 (IT equipment rooms) recommends pre-action sprinklers for data processing spaces to minimize accidental water discharge risk; wet-pipe is generally discouraged directly over IT hardware.
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A sprinkler system employs automatic sprinklers attached to a piping system containing water and connected to a water supply so that water discharges immediately when a head opens. What is this called?
In a wet pipe system, the piping is always filled with water under pressure. When a sprinkler head is triggered by heat, water is discharged immediately. This is the most common sprinkler system for general buildings.
Dry pipe: Pipes contain air or nitrogen; water enters only after valve activation.
Deluge: Pipes are empty, and all heads open simultaneously, releasing water everywhere.
Pre-action: Pipes are dry until detection and valve activation; reduces accidental discharge risk, recommended for IT rooms.
Since the definition describes immediate discharge from water-filled pipes, this is a wet pipe system.
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