Free EXIN CDCS Practice Test & Real Exam Questions

Exam Code/Number: CDCS
Exam Name/Title: EXIN EPI Certified Data Centre Specialist
Certification Provider: EXIN
Corresponding Certification: EPI Data Centre

Exam Questions: 122
Updated On: Jun 27, 2026

Question #1

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

A. There will be more switches to manage.

B. A ToR (Top of Rack) switch has only optical interfaces.

C. You need a separate rack to install all your ToR (Top of Rack) switches.

D. A single ToR (Top of Rack) switch is more expensive than an EoR (End of Row) switch.

Discussion 0

Correct Answer: A Vote an answer

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Question #2

What is the main advantage of using an End-of-Row (EoR) design?

A. There will be fewer switches to manage (corrected typing: original said "more")

B. A ToR switch has only optical interfaces

C. A single Top-of-Rack (ToR) switch is more expensive than an EoR switch

D. You need a separate rack to install all your EoR switches

Discussion 0

Correct Answer: A Vote an answer

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Question #3

The UPS of a data center with ANSI/TIA-942 Rating-4 is installed with the rectifier connected to power feed A and the bypass/reserve input connected to power feed B. To which feed will the UPS output be synchronized?

A. Feed A

B. The UPS will not synchronize to any feed but use an internal clock

C. Depends on UPS settings, as it can be set to either feed

D. Feed B

Discussion 0

Correct Answer: C Vote an answer

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Question #4

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. Data center A

B. Data center C

C. PUE does not indicate efficiency

D. Data center B

Discussion 0

Correct Answer: A Vote an answer

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Question #5

What is the minimum requirement for power feeds to a Rated-4 data center (ANSI/TIA-942)?

A. Two feeds from one substation

B. Two feeds from two different substations, one power company not acceptable

C. Two feeds from two different substations, one power company acceptable

D. One feed split into two distribution boards

Discussion 0

Correct Answer: C Vote an answer

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Question #6

What is the advantage or disadvantage of using MPO (Multi-fiber Push On)/pre-terminated fiber?

A. It speeds up installation and provides an easy upgrade to transmission speeds up to 40 Gbit/s -100 Gbit
/s.

B. There is no advantage, as it creates additional heat load in the data center.

C. It is a very flexible system as it can be used for both copper cables and optical fiber cables.

D. There is no advantage, as it cannot be used with OM4 optical fiber cables.

Discussion 0

Correct Answer: A Vote an answer

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Question #7

It is assumed that EMF shielding material must be installed as the EMF levels coming from the transformer room into the computer room are measured at 100mG. The transformer room is approximately 10 meters away from the computer room and is separated by a corridor. You can assume that no physical issues are present for installing shielding material at any area/location.
Where should you recommend the shielding material to be installed?

A. It does not matter, either close to the transformer room or the computer room is okay as there is no impact to cost or shielding material performance

B. As close as possible to the computer room

C. As close as possible to the transformer room

D. Shielding is not required to be installed as 100mG is within the acceptable levels for computer rooms

Discussion 0

Correct Answer: C Vote an answer

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Question #8

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?

A. No, as concurrently maintainable only applies to electrical and mechanical (power and cooling).

B. Yes, amongst other aspects, the network architecture should be Rated-3 compliant with the requirements of ANSI/TIA-942.

C. No, only the type of cabling used will be audited.

D. Yes, but only if the network administration does not comply with ANSI/TIA-606.

Discussion 0

Correct Answer: B Vote an answer

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