MCQ Flashcards
7 cards from real CDCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 MCQ flashcards as text
What does PUE stand for in data centre efficiency metrics?
Answer: Power Usage Effectiveness
PUE (Power Usage Effectiveness) is the ratio of total facility power to IT equipment power, where 1.0 is perfect efficiency.
Which cooling approach delivers cold air directly to server intakes via enclosed channels between cabinet rows?
Answer: Hot aisle/cold aisle containment
Hot aisle/cold aisle containment separates exhaust and intake air streams to prevent mixing and improve cooling efficiency.
In data centre design, what is the purpose of an N+1 redundancy configuration?
Answer: To provide one additional component beyond minimum required for operation
N+1 redundancy means one extra component exists beyond the minimum needed (N), allowing one failure without service interruption.
What is the primary function of a DCIM (Data Centre Infrastructure Management) system?
Answer: Monitoring and managing physical data centre assets, power, and cooling
DCIM tools provide real-time visibility and management of physical infrastructure including power, cooling, space, and assets.
Which Uptime Institute Tier level requires all components to be fully redundant with no single points of failure?
Answer: Tier IV
Tier IV (Fault Tolerant) requires 2N redundancy and can sustain any planned or unplanned event without impact to critical load.
What is the recommended temperature range for data centre cold aisles according to ASHRAE guidelines?
Answer: 64–80°F (18–27°C)
ASHRAE A1 class guidelines recommend inlet temperatures of 64–80°F (18–27°C) for most data centre IT equipment.
A data centre's critical load is 500 kW and total facility power is 750 kW. What is the PUE?
Answer: 1.50
PUE = Total Facility Power ÷ IT Equipment Power = 750 kW ÷ 500 kW = 1.5.