CDCP General 3

Question 1

Which metric measures the ratio of IT equipment power to total facility power consumption in a data center?

Accepted Answer

Power Usage Effectiveness (PUE)

Answer

PUE is the standard metric defined by The Green Grid that divides total facility power by IT equipment power.

Question 2

What does the 'N+1' redundancy model mean in data center design?

Accepted Answer

One extra component beyond what is needed for normal operation

Answer

N+1 redundancy means one additional component beyond the minimum required (N) to handle failure of any single unit.

Question 3

What is the standard hot-aisle/cold-aisle arrangement in a data center?

Accepted Answer

Server fronts face each other, backs face each other

Answer

Hot-aisle/cold-aisle containment places server fronts (intake) facing cold aisles and server backs (exhaust) facing hot aisles.

Question 4

According to ANSI/TIA-942, what is the highest data center tier classification?

Accepted Answer

Tier IV

Answer

Tier IV represents the highest level with fault-tolerant infrastructure allowing 99.9995% availability and simultaneous maintainability.

Question 5

What is the primary function of a Computer Room Air Handler (CRAH) unit?

Accepted Answer

To cool server rooms using chilled water from a central plant

Answer

CRAH units cool data center air by circulating it over coils supplied with chilled water from a central chiller plant.

CDCP - Certified Data Centre Professional Practice Test