DATA CENTER TECHNICIAN CERTIFICATION EXAM
PRACTICE – 100 QUESTIONS
1–25
1. What is the primary purpose of a data center hot aisle?
A. Provide space for cable trays
B. Reduce interference
C. Channel hot exhaust air away from equipment
D. Improve lighting
Rationale: Hot aisles collect and direct hot exhaust air for
efficient cooling.
2. Which UPS topology provides the highest level of protection?
A. Offline
B. Line-interactive
C. Double-conversion
D. Standby
Rationale: Double-conversion UPS isolates equipment from
power fluctuations.
3. The standard rack width in most data centers is:
A. 12 inches
B. 19 inches
C. 19 inches (standardized by EIA-310)
D. 24 inches
Rationale: EIA-310 defines standard racks as 19 inches wide.
4. Which fire suppression agent is most common in data centers?
A. Water
, B. CO₂
C. FM-200
D. Sand
Rationale: FM-200 protects electronics without water damage.
5. What is PDU an acronym for?
A. Power Distribution Utility
B. Power Distribution Unit
C. Power Data Utility
D. Power Drive Unit
Rationale: PDUs distribute power to rack-mounted equipment.
6. Raised floors are used primarily for:
A. Cabling aesthetics
B. Airflow and cable routing
C. Worker comfort
D. Noise reduction
Rationale: Raised floors support cooling distribution and cable
management.
7. What does “five nines” availability represent?
A. 95%
B. 98.9%
C. 99.999%
D. 100%
Rationale: Five nines equals 99.999% uptime.
8. A CRAC unit is designed to:
A. Generate power
B. Cool the data center and maintain humidity
C. Move racks
D. Provide backup networking
Rationale: CRAC units regulate temperature and humidity.
, 9. What is the typical voltage for server power supplies in a data
center?
A. 120V only
B. 208V or 230V
C. 480V
D. 12V
Rationale: Servers commonly run on 208–240V to increase
efficiency.
10. What type of cable is used for 10GBASE-SR?
A. Copper
B. Multimode fiber
C. Coax
D. Single-mode only
Rationale: 10GBASE-SR operates over multimode fiber.
11. What is the purpose of cold aisle containment?
A. Trap hot air
B. Isolate cold air for improved cooling efficiency
C. Prevent fire spread
D. Direct airflow to ceiling
Rationale: Cold aisle containment improves cooling efficiency by
separating cold air.
12. The standard unit of rack height is:
A. Meter
B. Inch
C. Foot
D. Rack Unit (U)
Rationale: Rack unit (1U = 1.75 inches) is the industry standard.
13. A redundant power configuration uses:
A. One PDU
PRACTICE – 100 QUESTIONS
1–25
1. What is the primary purpose of a data center hot aisle?
A. Provide space for cable trays
B. Reduce interference
C. Channel hot exhaust air away from equipment
D. Improve lighting
Rationale: Hot aisles collect and direct hot exhaust air for
efficient cooling.
2. Which UPS topology provides the highest level of protection?
A. Offline
B. Line-interactive
C. Double-conversion
D. Standby
Rationale: Double-conversion UPS isolates equipment from
power fluctuations.
3. The standard rack width in most data centers is:
A. 12 inches
B. 19 inches
C. 19 inches (standardized by EIA-310)
D. 24 inches
Rationale: EIA-310 defines standard racks as 19 inches wide.
4. Which fire suppression agent is most common in data centers?
A. Water
, B. CO₂
C. FM-200
D. Sand
Rationale: FM-200 protects electronics without water damage.
5. What is PDU an acronym for?
A. Power Distribution Utility
B. Power Distribution Unit
C. Power Data Utility
D. Power Drive Unit
Rationale: PDUs distribute power to rack-mounted equipment.
6. Raised floors are used primarily for:
A. Cabling aesthetics
B. Airflow and cable routing
C. Worker comfort
D. Noise reduction
Rationale: Raised floors support cooling distribution and cable
management.
7. What does “five nines” availability represent?
A. 95%
B. 98.9%
C. 99.999%
D. 100%
Rationale: Five nines equals 99.999% uptime.
8. A CRAC unit is designed to:
A. Generate power
B. Cool the data center and maintain humidity
C. Move racks
D. Provide backup networking
Rationale: CRAC units regulate temperature and humidity.
, 9. What is the typical voltage for server power supplies in a data
center?
A. 120V only
B. 208V or 230V
C. 480V
D. 12V
Rationale: Servers commonly run on 208–240V to increase
efficiency.
10. What type of cable is used for 10GBASE-SR?
A. Copper
B. Multimode fiber
C. Coax
D. Single-mode only
Rationale: 10GBASE-SR operates over multimode fiber.
11. What is the purpose of cold aisle containment?
A. Trap hot air
B. Isolate cold air for improved cooling efficiency
C. Prevent fire spread
D. Direct airflow to ceiling
Rationale: Cold aisle containment improves cooling efficiency by
separating cold air.
12. The standard unit of rack height is:
A. Meter
B. Inch
C. Foot
D. Rack Unit (U)
Rationale: Rack unit (1U = 1.75 inches) is the industry standard.
13. A redundant power configuration uses:
A. One PDU
