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  • Exam Name: Data Center University Associate Certification
  • Last Update: Jul 14, 2024
  • Questions and Answers: 324
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DU0-001 Practice Exam Questions with Answers Data Center University Associate Certification

Question # 6

What is defined as the force of electricity moving through a circuit?

A.

Volt

B.

Amp

C.

Ohm

D.

Frequency

Full Access
Question # 7

What is the primary feature of a smart card?

A.

A picture

B.

A bar code

C.

A silicon chip

D.

An expiration date

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Question # 8

What are two advantages that the isolated redundant configuration has over a capacity configuration? (Choose two.)

A.

The isolated redundant configuration has a lower operating cost than a capacity design.

B.

The isolated redundant configuration provides redundancy but the capacity configuration does not.

C.

The isolated redundant configuration can scale to larger capacities than the capacity configuration.

D.

The isolated redundant configuration allows multiple vendor UPSs. The capacity configuration must use the same UPS manufacturers.

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Question # 9

What function do patch panels serve in a data center?

A.

They convert Internet protocols (IP).

B.

They convert copper signals into fiber optic light signals.

C.

They serve as a demarcation point where ends of bulk cable converge.

D.

They improve the data cable signal capacity from 100 Base-T to 10 Gigabyte Ethernet.

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Question # 10

Click the Exhibit button.

DU0-001 question answer

In the exhibit, which power problem is illustrated?

A.

DC offset

B.

Voltage fluctuation

C.

Harmonic distortion

D.

Frequency variation

Full Access
Question # 11

Which fire class involves live electrical equipment?

A.

Class A

B.

Class B

C.

Class C

D.

Class D

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Question # 12

Physical security can be increased by which three activities? (Choose three.)

A.

Adding more IT personnel

B.

Adding live security guards

C.

Changing from smart cards to bar code badges

D.

Adding concentric security zones to increase "depth of security"

E.

Adding password or fingerprint verification at a card-reading checkpoint

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Question # 13

What is the primary security disadvantage of a bar code card?

A.

High cost

B.

Easily damaged

C.

Easy to counterfeit

D.

Does not have a picture

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Question # 14

Where should applications that use side-to-side cooling or high cable densities be installed?

A.

Seismic enclosure

B.

600 mm enclosures

C.

750 mm enclosures

D.

Wall-mount enclosures

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Question # 15

The power cable should be marked, at minimum, with which two pieces of information? (Choose two.)

A.

The source PDU

B.

The date installed

C.

The circuit breaker it is fed from

D.

The voltage capacity of the cable

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Question # 16

What is a common limiting factor when specifying a 48U rack / enclosure?

A.

Ceiling height

B.

Cable capacity

C.

Cooling requirements

D.

Enclosure door clearance

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Question # 17

Which statement describes the capability of a data cable installation?

A.

Category 5 cable can support 1 Gigabit Ethernet.

B.

Category 5e cable can support 1 Gigabit Ethernet

C.

Category 6a cable can support 10 Gigabit Ethernet.

D.

Category 6a cable can support 100 Gigabit Ethernet.

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Question # 18

What is the actual horizontal mounting hole spacing (center-to-center) based on the EIA-310 standard for 482.6 mm (19 inch) racks?

A.

450 mm (17.72 inches)

B.

465 mm (18.31 inches)

C.

482.6 mm (19 inches)

D.

495.3 mm (19.5 inches)

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Question # 19

Which capacity management technique addresses power, rack space, cooling, and cabling needs?

A.

Tracking server and infrastructure performance in high heat areas

B.

Maintaining status quo of the data center infrastructure

C.

Building the data center infrastructure with a raised floor environment

D.

Optimizing physical infrastructure layout of existing and new equipment

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Question # 20

What is the definition of reliability?

A.

The fraction of time a system is unable to perform its intended function.

B.

The likelihood that a system failure will occur for a specified time range.

C.

The ability of a system to perform its required functions for a specified period of time.

D.

The degree to which a system is accessible when required for use at an instant in time.

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Question # 21

What is one positive effect of using standardized racks / enclosures that are universally compatible with vendors' equipment?

A.

Improved monitoring

B.

Increased load capacity

C.

Mixing of hot and cold air

D.

Decreased lifecycle costs

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Question # 22

Which external factor will affect the level of moisture in the data center?

A.

Outside temperature

B.

Outside barometric air pressure

C.

Outside air coming in to supplement cooling

D.

Chilled water being pumped down from the roof

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Question # 23

Which two characteristics do all static UPS topologies share? (Choose two.)

A.

A battery

B.

An inverter

C.

A transfer switch

D.

A single-phase input

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Question # 24

What does the term "short cycling" mean?

A.

The fire suppression system clean agents are running low and have not been recycled.

B.

Cool air from the CRAC bypasses the IT equipment and flows directly into the CRAC return air duct.

C.

The raised floor is obstructed with excess cables and cool air is not getting through the vented floor tiles.

D.

The UPS supplies less runtime than anticipated because of overall wear and tear on the internal batteries.

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Question # 25

How is the problem of Electro-Static Discharge(ESD) in the data center solved?

A.

By installing TVSS devices

B.

By installing RCD breakers in the PDU

C.

By connecting bimetallic strips to all racks

D.

By insulating IT equipment with rubber bushings

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Question # 26

In which three locations are smoke detectors commonly placed in the data center? (Choose three.)

A.

On ceilings

B.

Below raised floors

C.

In cable trays

D.

Above drop down ceilings

E.

Inside the power distribution unit

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Question # 27

Click the Exhibit button.

DU0-001 question answer

This picture illustrates which type of cooling architecture?

A.

Hybrid

B.

Row

C.

Rack

D.

Room

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Question # 28

A data center manager wants to purchase a reliable UPS and specifies an MTBF of one million hours.

What are two reasons this specification is flawed? (Choose two.)

A.

Assumptions are not stated.

B.

No definition of failure is provided.

C.

Manufacturers do not provide MTBF.

D.

MTBF is not a measure of reliability.

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Question # 29

Which two ways does a transient voltage surge suppressor (TVSS) work? (Choose two.)

A.

Absorbs transient energy

B.

Short circuits the energy to ground

C.

Closes the circuit and stops the energy flow

D.

Compensates for the voltage change with battery power

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Question # 30

What is an advantage of using natural gas as a fuel source for a standby generator?

A.

Reduced fire hazard

B.

Easy on-site storage

C.

Minimum carbon build-up

D.

More hours of operation between overhauls

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Question # 31

Which two types of cables would you expect to see used in a network backbone?(Choose two.)

A.

Power cables

B.

Fiber optic cables

C.

Category 5/5e/6a cables

D.

Audio / video cables

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Question # 32

What is the correct order of the refrigeration cycle datacenter precision cooling?

A.

Condensation > evaporation > expansion > compression

B.

Compression > condensation > evaporation > expansion

C.

Evaporation > expansion > condensation > compression

D.

Evaporation > compression > condensation > expansion

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Question # 33

Data cabling infrastructure consists of which broad categories of cable?

A.

Data cables and power cables

B.

Fiber cables and copper cables

C.

Solid cables and stranded cables

D.

Category (CAT) 5 cables and category (CAT) 6 cables

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Question # 34

The rear of an IT equipment rack is fitted with a fan-assist device that is connected to a drop ceiling plenum, which is in turn connected to the perimeter CRAC unit.

This is an example of which type of air distribution system?

A.

Flooded supply

B.

Fully ducted return

C.

Locally ducted return

D.

Locally ducted supply

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Question # 35

Which component of a line interactive UPS increases its battery life?

A.

Dual mains input

B.

Voltage regulating transformer

C.

Low impedance DC disconnect

D.

High impedance battery charge circuit

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Question # 36

How do enclosures improve rack system cooling?

A.

By improving natural air flow

B.

By improving fire suppression

C.

By allowing hot and cold air to mix together

D.

By preventing hot and cold air from mixing together

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Question # 37

A UPS system consists of three modules in a parallel redundant configuration. Each module is rated to provide 200 kW of power. If the electrical load grows from 350 kW to 420 kW, what will happen?

A.

The UPS system will not provide any additional power beyond 400 kW.

B.

The UPS system will reach an overload state and switch to its static bypass.

C.

The UPS system's response will vary depending on the rate of electrical load growth.

D.

The UPS system will continue to support the load and become a capacity configuration.

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Question # 38

Which is an example of a rack-oriented cooling architecture?

A.

A cooling unit is located in the ceiling plenum to cool the data center racks.

B.

A cooling unit is located within the rack itself to cool the contents of that rack.

C.

A cooling unit utilizes perforated raised floor tiles to deliver cool air to the rack.

D.

A cooling unit is located along the perimeter wall of the data center to cool a specific zone of racks.

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Question # 39

Which two should be used as a basis for determining the UPS redundancy configuration? (Choose two.)

A.

Voltage level

B.

Cost of downtime

C.

Availability requirements

D.

Size of the electrical load

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Question # 40

During a power outage, a retail store is likely to exhibit which cost of downtime profile?

A.

Cost of downtime per hour remains the same.

B.

Cost of downtime per hour increases with time.

C.

Cost of downtime per hour decreases with time.

D.

Cost of downtime per hour is exponential with time.

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Question # 41

When considering data center physical security, which two are examples of "what you know" ? (Choose two.)

A.

Password typed at a card reader

B.

Numbers punched into a coded lock

C.

The procedure for obtaining a replacement smart card

D.

The sequence of actions for entering and leaving a "man trap"

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Question # 42

Why will touching a doorknob after walking across a carpet only cause a slightly painful spark, but touching a live utility wire inside the data center could cause death?

A.

The utility company's voltage is much higher than that of the spark.

B.

The spark generates DC power but the utility company generates AC power.

C.

The current available from a spark is much less than the current available from the utility company.

D.

The human skin has a high enough resistance to keep from being hurt from the spark's voltage but not from the utility company's voltage.

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Question # 43

Which three factors should be considered when evaluating physical security systems? (Choose

three.)

A.

VESD protocols

B.

User friendliness

C.

Cost of equipment

D.

Color of security hardware components

E.

Likelihood of locking out legitimate users

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Question # 44

In which heat rejection system is the compressor located outside of the CRAC unit?

A.

Chilled water systems

B.

Water cooled systems

C.

Glycol cooled systems

D.

Air cooled self-contained systems

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Question # 45

Which statement describes the system + system redundant configuration?

A.

Identical UPS systems are required.

B.

It is the most expensive configuration.

C.

Only single corded loads can be supported.

D.

Design capacities are much smaller than other configurations.

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Question # 46

What is the critical element of a conventional starter motor in a generator?

A.

Battery

B.

Starter cables

C.

Engine block heater

D.

Automatic charging system

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Question # 47

A coded lock is an example of which general type of access control?

A.

Who you are

B.

Where you are

C.

What you have

D.

What you know

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Question # 48

Which two practices help prevent data center fires? (Choose two.)

A.

Using an FM-200 clean agent

B.

Mandating a no-smoking policy

C.

Avoiding the use of acoustic foam

D.

Using trash receptacles without covers

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Question # 49

What are two reasons for choosing enclosures with square holes and cage nuts? (Choose two.)

A.

Eases repair of mounting rails

B.

Eases installation

C.

Eases bolt alignment

D.

Eases enclosure stabilization

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Question # 50

Why are frequency variations a small concern for data center managers?

A.

Frequency variation helps server performance.

B.

Computer power supplies are frequency tolerant.

C.

Frequency variation is strictly a theoretical problem.

D.

Frequency variation occurs during sag conditions, which the UPS resolves.

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Question # 51

What are two causes of impulsive transients? (Choose two.)

A.

Lightning strikes

B.

Generator switch-over

C.

Air conditioner starting up

D.

Electrostatic discharge (ESD)

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Question # 52

Which two does the network-critical physical infrastructure (NCPI) management system monitor at the rack level? (Choose two.)

A.

The monitoring of a chiller at the rack level.

B.

The monitoring of comfort cooling at the rack level.

C.

The monitoring of supplemental cooling devices at the rack level.

D.

The monitoring of rack based transfer switches at the rack level.

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Question # 53

What is the main function of a UPS?

A.

To provide battery back-up power to IT equipment

B.

To regulate the voltage of power going to the racks

C.

To distribute power from the transformer to the racks

D.

To supply diesel-generated power when the utility is out

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Question # 54

Which method of heat transfer occurs when stepping barefoot onto hot pavement?

A.

Radiation

B.

Convection

C.

Conduction

D.

Evaporation

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Question # 55

Which NCPI change management challenge is faced when optimizing business agility?

A.

Maximizing the ratio of rack efficiency to cost over runs.

B.

Maximizing the ratio of the UPS to batteries needed for uptime.

C.

Maximizing the ratio of planned to unplanned work in a data center.

D.

Maximizing the ratio of leak detection to computer room air conditioners.

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Question # 56

Which is an example of a row-oriented cooling architecture?

A.

Each cooling unit works to cool the load through a raised floor plenum.

B.

Each cooling unit is ceiling mounted and targets cool air to the cold aisles.

C.

Each cooling unit works directly to cool the heat load of a specific equipment rack.

D.

Each cooling unit is placed along the data center wall and cools the general air space.

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Question # 57

What is the unit of measurement of the electrical current moving through a circuit?

A.

Volt

B.

Amp

C.

Ohm

D.

Frequency

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Question # 58

When constructing a new data center, what is a best practice for controlling the influence of outside humidity?

A.

Use water-based paints for the walls.

B.

Install vapor barriers in walls and around doors.

C.

Increase the number of doors leading out of the data center.

D.

Use 2 foot by 6 foot ( .61 meters by 1.83 meters) steel framing for the walls, floors, and ceilings.

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Question # 59

What is a disadvantage of an 'N' or capacity UPS configuration when compared to the other configurations?

A.

Not scalable

B.

Not redundant

C.

Most difficult to design

D.

Most recent design that is not yet widely accepted

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Question # 60

The Ideal Gas Law governs the relationship of which three state variables? (Choose three.)

A.

Volume

B.

Viscosity

C.

Pressure

D.

Conductivity

E.

Temperature

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Question # 61

Click the Exhibit button.

DU0-001 question answer

What does the shaded area in the exhibit represent?

A.

Deferred investment

B.

Waste due to oversizing

C.

Total redundant capacity

D.

Additional power needed

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Question # 62

Which two would cause a swell? (Choose two.)

A.

Ground fault interrupt

B.

Sudden load reductions

C.

Single-phase fault in a three-phase system

D.

Automatic transfer switch (ATS) transfer to secondary power

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Question # 63

Which NCPI management technique specifically addresses the challenge of maintaining spare equipment at compatible firmware revision levels to avoid downtime?

A.

Change management

B.

Capacity management

C.

Reliability management

D.

Availability management

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Question # 64

During a power outage, a semi-conductor manufacturing plant is likely to exhibit which cost of downtime profile?

A.

Cost of downtime per hour remains the same.

B.

Cost of downtime per hour increases with time.

C.

Cost of downtime per hour decreases with time.

D.

Cost of downtime per hour is exponential with time.

Full Access
Question # 65

Which three situations can physical security systems help prevent? (Choose three.)

A.

Network viruses

B.

Accidental EPO activation

C.

Theft of generator batteries

D.

Power outages caused by the utility company

E.

Circuit overloads due to unauthorized addition of servers

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Question # 66

How does poor network cable management within an IT rack lead to IT equipment damage?

A.

Obstructs airflow

B.

Adds weight to servers

C.

Requires the need for more cabling

D.

Causes cable to exceed bend radius

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Question # 67

Which statement is true about humidity?

A.

If the relative humidity is zero, there is no water vapor present.

B.

As the air temperature decreases, its ability to hold water increases.

C.

If the relative humidity is 50%, the air is holding all the water vapor it can.

D.

The amount of water that can be contained in the room air is fixed regardless of the room temperature.

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Question # 68

What would be a comprehensive strategy for protecting the most critical racks of a data center?

A.

Key access to the critical racks

B.

Video camera pointed directly at critical racks

C.

Iris scanner at the entrance to the data center

D.

Nested security perimeters with racks at the innermost level

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Question # 69

What are two primary challenges for optimizing lifecycle costs with regard to rack systems? (Choose two.)

A.

Structural integrity

B.

Non-standardized racks

C.

Slow speed of deployment

D.

Floor space requirements

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Question # 70

In three-phase power, by how many degrees are the three basic power waveforms offset?

A.

60

B.

90

C.

120

D.

180

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Question # 71

Hot aisle containment systems serve which primary function?

A.

They enclose the top and bottom of racks to balance hot and cold air.

B.

They enclose the rear of racks to ensure mixing of hot and cold air.

C.

They enclose the front of racks to ensure reliable supply air delivery.

D.

They enclose the rear of racks to prevent mixing of hot and cold air.

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Question # 72

Which statement describes a three-phase power source?

A.

Two voltage sine wave references consisting of two "hot" wires and a ground

B.

One voltage sine wave reference consisting of a "hot" wire, a neutral wire, and a ground

C.

Three voltage sine wave references consisting of one "hot" wire, one neutral wire, and a ground

D.

Three voltage sine wave references consisting of three "hot" wires and accompanying neutral and a ground

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Question # 73

Which three fuels are used to power a generator? (Choose three.)

A.

Glycol

B.

Diesel

C.

Gasoline

D.

Methanol

E.

Natural gas

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Question # 74

What are two common UPS topologies? (Choose two.)

A.

Standby

B.

Delta interactive

C.

Standard interactive

D.

Double conversion on-line

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Question # 75

What does the CFD acronym stand for?

A.

Certified Field Dichotomy

B.

Circular Flow Determination

C.

Computational Finite Deviation

D.

Computational Fluid Dynamics

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Question # 76

What are three benefits of rack-oriented cooling architecture? (Choose three.)

A.

It reduces CRAC fan power required.

B.

It utilizes the entire rated CRAC capacity.

C.

It eliminates the need for humidity control.

D.

It is easy to deploy for high density applications.

E.

It reduces the number of air conditioning devices.

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Question # 77

What are two primary questions that any good physical security system should consider regarding any visitor to the data center?

A.

"Who are you?" and "Why are you here?"

B.

"Who are you?" and "Where are you going?"

C.

"Why are you here?" and "Where did you come from?"

D.

"Where did you come from?" and "Where are you going?"

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Question # 78

What are three benefits of row-oriented cooling architecture? (Choose three.)

A.

Predictable cooling

B.

Ease of deployment

C.

No raised floor required

D.

Reduced sensible heat ratio

E.

Increased mixing of air streams

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Question # 79

An infrared scan of cabling can detect what two problems? (Choose two.)

A.

An overloaded circuit

B.

A loose connection

C.

Compatibility errors

D.

Electrical interference

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Question # 80

For reliable generator operation, what are two critical elements of the prime mover? (Choose two.)

A.

Air filter

B.

Fuel filter

C.

Noise filter

D.

Harmonic filter

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Question # 81

A planning challenge for data center managers is to find an NCPI solution that allows incremental purchases of necessary resources on short time frames.

Which type of NCPI management is concerned with this challenge?

A.

Change management

B.

Incident management

C.

Capacity management

D.

Availability management

Full Access
Question # 82

What defines a sub-panel?

A.

An enclosure consisting of buss-bars and circuit breakers located at the service entrance to a building B. An enclosure consisting of buss-bars and circuit breakers with the fundamental purpose of distributing power to receptacles and the load

B.

An enclosure consisting of buss-bars and circuit breakers designed to accept two sources of power and operate as a best source selector

C.

An enclosure consisting of buss-bars and draw-out circuit breakers with the fundamental purpose of distributing power to branch distribution panels

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Question # 83

What are three functions of a data center fire protection system? (Choose three.)

A.

Detect the presence of a fire

B.

Automatically opens all fire doors

C.

Suppress the fire and limit any damage

D.

Communicate the threat of fire to occupants and authorities

E.

Automatically activate the emergency power off (EPO) button

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Question # 84

What is most critical for an aircraft that is in flight?

A.

Reliability

B.

Availability

C.

Manageability

D.

Maintainability

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Question # 85

Click the Exhibit button.

DU0-001 question answer

In the exhibit, which type of power problem is illustrated?

A.

DC offset

B.

Overvoltage

C.

Undervoltage

D.

Harmonic distortion

Full Access
Question # 86

What describes the ratio of watts to volt-amps?

A.

Frequency

B.

Power factor

C.

Actual power

D.

Apparent power

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Question # 87

What statement accurately describes the term "continuous load"?

A.

A load left on for 3 consecutive hours or more

B.

A load supported by a direct feed from the utility

C.

A load that supports a continuous run of 208 V cables

D.

A load that consists of components that support both AC and DC power

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Question # 88

When developing a management strategy, how long do organizations typically focus on fully implementing each management process before moving on to the next?

A.

One to three months

B.

Three to six months

C.

Six to nine months

D.

Nine to twelve months

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Question # 89

Cooling towers are a typical component of which heat rejection system?

A.

Water cooled system

B.

Glycol cooled system

C.

Air cooled split system

D.

Air cooled self-contained system

Full Access
Question # 90

In order to determine the exact level of redundancy available in the cooling system, which cooling architecture would require CFD analyses of every combination of system failures within the data center?

A.

Row

B.

Rack

C.

Room

D.

Ceiling

Full Access
Question # 91

DU0-001 question answer

Which air distribution method is displayed in this picture?

A.

Fully ducted supply, flooded return

B.

Flooded supply, fully ducted return

C.

Flooded supply, locally ducted return

D.

Locally ducted supply, flooded return

Full Access
Question # 92

Which type of application typically utilizes an enclosure wider than 600 mm?

A.

Network cabling

B.

Storage disk arrays

C.

Rack-mounted UPS

D.

Shelf-mounted tower servers

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Question # 93

Which is an example of an NCPI management system data point?

A.

Monitoring of network traffic

B.

Mislabeling of kirk-key interlock

C.

Advanced warning of UPS battery deficiency

D.

Reading of boiler room steam pressure levels

Full Access
Question # 94

What is the highest cost UPS configuration?

A.

System + system

B.

Parallel redundant

C.

Isolated redundant

D.

Distributed redundant

Full Access
Question # 95

Which statement describes biometrics?

A.

The design of ergonomic factors that affect data center efficiency

B.

Data trending and analysis of the traffic passing a security check point

C.

Access control based on a unique physical characteristic of an individual

D.

Monitoring of environmental factors, such as heat and humidity, that affect data center personnel

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Question # 96

What is an advantage of a large floor mount systems?

A.

Plugs into wall outlets

B.

Highest capacity units

C.

Rapid redeployment to a different location

D.

Does not take away from IT equipment space

Full Access
Question # 97

Which statement is a recognized characteristic of single-phase power?

A.

Single-phase power excludes the use of three-phase power in the data center.

B.

Single-phase power provides an effective means for delivering DC power to the data center.

C.

Single-phase power is an effective choice of power supply when data center users require large volumes of power.

D.

Single-phase power implies that power comes into the data center with one "hot" wire, along with accompanying neutral and ground.

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