DATA CENTER TECHNICIAN CERTIFICATION
PRACTICE EXAM – 100 QUESTIONS
1. What is the primary purpose of a data center?
a) Storing customer laptops
b) Hosting IT equipment and critical applications
c) Training employees
d) Billing and accounting
Answer: b
Rationale: Data centers are designed to host servers, networking
equipment, and critical digital services.
2. Which of the following best describes a rack unit (U)?
a) 2.5 inches
b) 1.75 inches
c) 1 inch
d) 5 inches
Rationale: One rack unit (U) equals 1.75 inches in height.
3. Which type of cable is most commonly used for server network
connections in modern data centers?
a) Coaxial
b) Telephone cable
c) Ethernet (Cat6/Cat6a)
d) Fiber-to-home cable
Rationale: Cat6/Cat6a Ethernet cables are standard for copper
networking in data centers.
4. What does PDU stand for?
a) Power Delivery Unit
b) Power Distribution Unit
, c) Power Draft Utility
d) Power Diode Unit
Rationale: PDUs distribute electrical power to racks and
equipment.
5. Which fire suppression system is common in data centers?
a) Water sprinkler
b) FM-200
c) Dry leaves
d) None
Rationale: FM-200 is a clean agent safe for electronics.
6. Hot aisle/cold aisle design improves:
a) Security
b) Cooling efficiency
c) Fire suppression
d) Electrical grounding
Rationale: Separating hot and cold air reduces cooling costs and
thermal issues.
7. What is the purpose of grounding?
a) Increase speed
b) Reduce electrical hazards
c) Track equipment
d) Improve bandwidth
Rationale: Grounding prevents electrical shock and equipment
damage.
8. A dual power-supply server is used for:
a) Redundancy
b) Cooling
c) Cabling
, d) Data wiping
Rationale: Redundant PSUs increase uptime.
9. UPS stands for:
a) United Power Service
b) Uninterruptible Power Supply
c) Universal Power Station
d) Under Power Source
Rationale: UPS provides temporary battery backup.
10. A common voltage for North American data center servers
is:
a) 12V
b) 48V
c) 208V
d) 1000V
Rationale: 208V is typical for rack-level power distribution.
11. What device connects multiple network segments?
a) Firewall
b) Modem
c) Switch
d) Transceiver
Rationale: Switches manage local network traffic.
12. Fiber LC connectors are typically:
a) Large metal connectors
b) Small form-factor snap-in connectors
c) Screw-in cable connectors
d) Telephone-type connectors
Rationale: LC connectors are compact and widely used in data
centers.
PRACTICE EXAM – 100 QUESTIONS
1. What is the primary purpose of a data center?
a) Storing customer laptops
b) Hosting IT equipment and critical applications
c) Training employees
d) Billing and accounting
Answer: b
Rationale: Data centers are designed to host servers, networking
equipment, and critical digital services.
2. Which of the following best describes a rack unit (U)?
a) 2.5 inches
b) 1.75 inches
c) 1 inch
d) 5 inches
Rationale: One rack unit (U) equals 1.75 inches in height.
3. Which type of cable is most commonly used for server network
connections in modern data centers?
a) Coaxial
b) Telephone cable
c) Ethernet (Cat6/Cat6a)
d) Fiber-to-home cable
Rationale: Cat6/Cat6a Ethernet cables are standard for copper
networking in data centers.
4. What does PDU stand for?
a) Power Delivery Unit
b) Power Distribution Unit
, c) Power Draft Utility
d) Power Diode Unit
Rationale: PDUs distribute electrical power to racks and
equipment.
5. Which fire suppression system is common in data centers?
a) Water sprinkler
b) FM-200
c) Dry leaves
d) None
Rationale: FM-200 is a clean agent safe for electronics.
6. Hot aisle/cold aisle design improves:
a) Security
b) Cooling efficiency
c) Fire suppression
d) Electrical grounding
Rationale: Separating hot and cold air reduces cooling costs and
thermal issues.
7. What is the purpose of grounding?
a) Increase speed
b) Reduce electrical hazards
c) Track equipment
d) Improve bandwidth
Rationale: Grounding prevents electrical shock and equipment
damage.
8. A dual power-supply server is used for:
a) Redundancy
b) Cooling
c) Cabling
, d) Data wiping
Rationale: Redundant PSUs increase uptime.
9. UPS stands for:
a) United Power Service
b) Uninterruptible Power Supply
c) Universal Power Station
d) Under Power Source
Rationale: UPS provides temporary battery backup.
10. A common voltage for North American data center servers
is:
a) 12V
b) 48V
c) 208V
d) 1000V
Rationale: 208V is typical for rack-level power distribution.
11. What device connects multiple network segments?
a) Firewall
b) Modem
c) Switch
d) Transceiver
Rationale: Switches manage local network traffic.
12. Fiber LC connectors are typically:
a) Large metal connectors
b) Small form-factor snap-in connectors
c) Screw-in cable connectors
d) Telephone-type connectors
Rationale: LC connectors are compact and widely used in data
centers.
