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DU0-001 Sample Questions Answers

Questions 4

What is the primary feature of a smart card?

Options:

A.

A picture

B.

A bar code

C.

A silicon chip

D.

An expiration date

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Questions 5

What is a fundamental purpose of a step-up or step-down transformer?

Options:

A.

Supply a neutral reference on the secondary side that is different than what is supplied on the primary side.

B.

Supply a ground reference on the secondary side that is different than what is supplied to the primary side.

C.

Deliver a voltage reference on the secondary side of the transformer different than what is supplied to the primary side.

D.

Deliver the same voltage reference on the secondary side of the transformer equal to that supplied on the primary side.

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Questions 6

Which fire class involves live electrical equipment?

Options:

A.

Class A

B.

Class B

C.

Class C

D.

Class D

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Questions 7

Click the Exhibit button.

In the exhibit, which power problem is illustrated?

Options:

A.

DC offset

B.

Voltage fluctuation

C.

Harmonic distortion

D.

Frequency variation

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Questions 8

In network data cabling, what is currently the medium of choice for short cable runs?

Options:

A.

Arcnet

B.

Copper

C.

Ethernet

D.

Twisted pair

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Questions 9

Your data center has a 75 kW load and is located in a building that would require long distances between the indoor and outdoor cooling units. There is no cooling tower available and reducing capital cost is a priority.

Which heat rejection method should be used?

Options:

A.

Chilled water system

B.

Water cooled system

C.

Glycol cooled system

D.

Air cooled split system

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Questions 10

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

Options:

A.

Glycol

B.

Diesel

C.

Gasoline

D.

Methanol

E.

Natural gas

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Questions 11

What is the major weakness of a bar code card system?

Options:

A.

The cards are expensive.

B.

The cards interfere with RFID systems.

C.

It is relatively easy to duplicate the cards.

D.

Running a magnet next to a card reader will disrupt the accuracy of the reader.

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Questions 12

Click the Exhibit button.

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

Options:

A.

DC offset

B.

Overvoltage

C.

Undervoltage

D.

Harmonic distortion

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Questions 13

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

Options:

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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Questions 14

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

Options:

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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Questions 15

Which statement defines "service entrance"?

Options:

A.

The switchgear delivering AC power to a UPS

B.

The secondary side of a transformer at 208 V or 230 V

C.

The point at which power is distributed from a panel board to a receptacle or local power distribution within an IT enclosure

D.

The point where the responsibility of the electrical power infrastructure shifts from the utility company to the owner or tenants of the building

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Questions 16

What makes network-critical physical infrastructure (NCPI) management different from traditional building management systems?

Options:

A.

Availability of safety resources

B.

Safety of the people in the building

C.

Availability of computing resources

D.

Comfort of the people in the building

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Questions 17

How do non-insulated water pipes impact humidity in the data center?

Options:

A.

They can increase the humidity in the data center.

B.

They can decrease the humidity in the data center.

C.

They do not affect the overall humidity of the data center.

D.

The affect they have on humidity depends on whether the pipes are copper or steel.

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Questions 18

What is a common concern when specifying the depth of a rack / enclosure?

Options:

A.

Seismic zone

B.

Server dimensions

C.

Available mounting units

D.

Ambient room temperature

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Questions 19

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

Options:

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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Questions 20

A co-location company invested huge amounts of capital to develop a solid, high security infrastructure and planned for "worse case" in terms of capacity.

What are two possible reasons this company failed? (Choose two.)

Options:

A.

They tied up unnecessary capital.

B.

The power capacity forecast was underestimated.

C.

They could not adapt to changing customer needs.

D.

They ran out of floor space to host additional clients.

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Questions 21

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

Options:

A.

Battery

B.

Starter cables

C.

Engine block heater

D.

Automatic charging system

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Questions 22

What is an advantage of choosing a four-post open frame rack over a two-post open frame rack?

Options:

A.

Lower cost

B.

Smaller footprint

C.

Easier assembly

D.

Increased strength

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Questions 23

What is the historical / traditional architecture of data center cooling?

Options:

A.

Rack

B.

Row

C.

Room

D.

Building

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Questions 24

Which fire class consists of fires of ordinary combustible materials such as paper, wood, cloth, and some plastics?

Options:

A.

Class A

B.

Class B

C.

Class C

D.

Class D

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Questions 25

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

Options:

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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Questions 26

Hot aisle containment systems serve which primary function?

Options:

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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Questions 27

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

Options:

A.

Structural integrity

B.

Non-standardized racks

C.

Slow speed of deployment

D.

Floor space requirements

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Questions 28

What two characteristics can result in poor performance of network cables? (Choose two.)

Options:

A.

Tie wraps that are too tight

B.

Vertical cable management

C.

A bend radius that is too small

D.

An overhead deployment with cables run in troughs

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Questions 29

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

Options:

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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Questions 30

Which data center network-critical physical infrastructure (NCPI) component has the ability to control relative humidity?

Options:

A.

Rack enclosure

B.

Fire suppression system

C.

Uninterruptible power supply (UPS)

D.

Computer room air conditioner (CRAC)

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Questions 31

Which three statements describe a circuit breaker? (Choose three.)

Options:

A.

It regulates voltage.

B.

It is a type of switch.

C.

It serves as a best source selector.

D.

It comes in a wide range of voltages and amps.

E.

It is designed to protect electrical equipment from damage caused by overload or short circuit.

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Questions 32

Which represents the highest expense when pricing out a cabling solution?

Options:

A.

Delivery cost

B.

Installation cost

C.

Inventory and storage cost

D.

Patch cable maintenance cost

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Questions 33

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

Options:

A.

Who you are

B.

Where you are

C.

What you have

D.

What you know

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Questions 34

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

Options:

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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Questions 35

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

Options:

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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Questions 36

Click the Exhibit button.

This picture illustrates which type of cooling architecture?

Options:

A.

Hybrid

B.

Row-oriented

C.

Rack-oriented

D.

Room-oriented

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Questions 37

What are three power distribution components found in data centers? (Choose three.)

Options:

A.

Ground loop

B.

Branch circuit

C.

Metered outlet strip

D.

Power distribution unit (PDU)

E.

Valve regulated lead acid (VRLA) battery

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Questions 38

Which of the following is an example of equipment that would be monitored by a building management system (BMS) ?

Options:

A.

A network router

B.

A telephone switch

C.

A data center server

D.

A comfort-air conditioning system

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Questions 39

Which three access control methods are examples of "what you have"? (Choose three.)

Options:

A.

Fingerprint

B.

Smart card

C.

Badge with photo

D.

Badge with bar code

E.

Personal identification number

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Questions 40

A previously built data center inherited the existing wet pipe sprinkler system. There are smoke detectors in the data center and the local authority having code jurisdiction mandates a sprinkler system in the data center.

How can you further protect the data center's IT equipment while meeting the mandated requirements?

Options:

A.

Replace the wet-pipe sprinkler system with a FM-200 system.

B.

Replace the wet-pipe sprinkler system with a pre-action system.

C.

Install linear heat detectors along the cable trays in addition to the existing sprinkler system.

D.

Install heat detectors next to each of the sprinkler heads and then connect them to the fire control panel.

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Questions 41

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

Options:

A.

High cost

B.

Easily damaged

C.

Easy to counterfeit

D.

Does not have a picture

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Questions 42

What is the largest cause of downtime in data centers?

Options:

A.

Sabotage

B.

Human error

C.

Natural disasters

D.

Equipment failure

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Questions 43

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?

Options:

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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Questions 44

Chilled water produced by a chiller is typically within which temperature range?

Options:

A.

34 - 38 F (1 - 3 C)

B.

44 - 48 F (6 - 9 C)

C.

56 - 60 F (13 - 16 C)

D.

70 - 74 F (21 - 23 C)

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Questions 45

Which statement is correct about using Halon as a fire suppression agent in data centers?

Options:

A.

It is lethal to humans.

B.

It damages the ozone layer.

C.

It is corrosive to computer equipment.

D.

It is conductive and may cause computer faults.

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Questions 46

Which statement illustrates a characteristic of nominal voltage?

Options:

A.

Nominal voltage is the voltage reference published by the power company.

B.

In most geographies, nominal voltage is fixed at either 380 V or 460 V.

C.

Nominal voltage is calculated based upon the load characteristics of the end user.

D.

Nominal voltage is the voltage that is supplied to the building and factors in power distribution losses.

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Questions 47

The highest density per rack heat loads should be cooled with which cooling architecture?

Options:

A.

Row

B.

Rack

C.

Room

D.

Building

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Questions 48

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

Options:

A.

Reliability

B.

Availability

C.

Manageability

D.

Maintainability

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Questions 49

Which type of cooling equipment can IT professionals install without requiring assistance from facilities personnel?

Options:

A.

Portable systems

B.

Floor mounted systems

C.

Ceiling mounted systems

D.

Wall mounted split-systems

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Questions 50

Which two would be used for biometric access control? (Choose two.)

Options:

A.

Voice

B.

Fingerprint

C.

Smart cards

D.

Personal identification number

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Questions 51

Which statement correctly defines direct current (DC)?

Options:

A.

Only high voltage is used.

B.

Electricity flows in one direction only.

C.

The circuit does not have multiple paths.

D.

The circuit is directly attached to the power source.

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Questions 52

Which temperature range is optimal for the proper function of a data center?

Options:

A.

62-65F (17-18C)

B.

72-75F (22-24C)

C.

82-85F (28-29C)

D.

92-95F (33-35C)

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Questions 53

What are three components of power distribution? (Choose three.)

Options:

A.

Flexible conduit

B.

Circuit / branch circuit

C.

Automatic Transfer Switch (ATS)

D.

Uninterruptible Power Supply (UPS)

E.

Ground Loop

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Questions 54

What are the three stages of combustion? (Choose three.)

Options:

A.

Incipient

B.

Back draft

C.

Thermal flux

D.

Intense heat

E.

Visible smoke

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Questions 55

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

Options:

A.

One to three months

B.

Three to six months

C.

Six to nine months

D.

Nine to twelve months

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Questions 56

Planned downtime is necessary for many data centers. management tools that ignore planned downtime can have which consequence?

Options:

A.

Spurious alerts leading to incorrect actions by personnel

B.

Insufficient runtime specifications for blade server deployments

C.

Downtime that can result from individual components failing

D.

Reduction in the training and knowledge that is necessary to maintain the NCPI system

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Questions 57

Which statement describes the capability of a data cable installation?

Options:

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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Questions 58

How does a rack-mounted side air distribution unit improve air flow?

Options:

A.

It pulls air from cold aisles and directs it to side equipment inlets.

B.

It pulls air from the sides of the enclosure and directs it through the top.

C.

It pulls air from the sides of the enclosure and directs it to the hot aisles.

D.

It pulls air from the raised floor and directs it through the sides of the enclosure.

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Questions 59

What is the most common direction of airflow through a rack mount blade server assembly?

Options:

A.

Side to side

B.

Front to back

C.

Back to front

D.

Bottom to top

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Questions 60

What is the difference between reliability and availability?

Options:

A.

MTTR is only factored into reliability.

B.

MTBF is only factored into availability.

C.

Reliability is composed of MTBF and MTTR.

D.

Availability is composed of MTBF and MTTR.

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Questions 61

Which approach is used to redundantly power IT servers?

Options:

A.

Dual power whips

B.

Dual cord, dual power supply

C.

Both 120 V and 208 V circuits

D.

Both solid and stranded copper cables

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Questions 62

Seismic enclosures are designed to protect installed equipment from what hazards?

Options:

A.

Earthquakes

B.

Liquids

C.

Dusty environments

D.

Fire or excessive heat

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Questions 63

What is an indirect cost of downtime that is difficult to quantify?

Options:

A.

Legal fees

B.

Lost revenues

C.

Idle employees

D.

Damaged brand perception

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Questions 64

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

Options:

A.

Volt

B.

Amp

C.

Ohm

D.

Frequency

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Questions 65

What does GFCI mean?

Options:

A.

Ground Fault Circuit Interrupter

B.

General Facilities Cooling Index

C.

Gaussian Filter Charge Indicator

D.

Grounded Flaw Circuitry Installed

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Questions 66

Which method will allow IT and Facilities to monitor every aspect of the data center?

Options:

A.

Enterprise management system (EMS) only

B.

Network-critical physical infrastructure (NCPI) only

C.

EMS and building management systems (BMS) through an NCPI element manager

D.

Enterprise management system (EMS) and building management systems (BMS) with integrated backbone

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Questions 67

According to the Ideal Gas Law, what happens to the temperature and pressure inside an aerosol can that is being sprayed?

Options:

A.

Temperature and pressure both increase.

B.

Temperature and pressure are decreased.

C.

Temperature and pressure are unchanged.

D.

Temperature is unchanged and pressure is decreased.

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Questions 68

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

Options:

A.

An overloaded circuit

B.

A loose connection

C.

Compatibility errors

D.

Electrical interference

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Questions 69

MTBF is presented in which form?

Options:

A.

Hours

B.

Percent

C.

Distance

D.

Currency

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Questions 70

Which air conditioning system must have a one-to-one relationship between the indoor unit and the outdoor heat exchanger?

Options:

A.

Air cooled systems

B.

Chilled water systems

C.

Water cooled systems

D.

Glycol cooled systems

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Questions 71

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

three.)

Options:

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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Questions 72

Which three preventative maintenance activities are required to ensure reliability of a standby generator and automatic transfer switch? (Choose three.)

Options:

A.

Take coolant samples.

B.

Perform a thermal scan.

C.

Perform a diagnostic on the rectifier.

D.

Perform an inverter voltage regulation check.

E.

Perform a trip setting check of all major circuit breakers.

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Questions 73

Which network topology does IEEE 802.3 UTP/STP Ethernet use?

Options:

A.

Star

B.

Ring

C.

Tree

D.

Wheel

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Questions 74

What is the core management component of any fire protection system?

Options:

A.

Fire control panel

B.

Intelligent smoke detector

C.

Energy management system

D.

Building management system

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Questions 75

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

Options:

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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Questions 76

What does NFPA mean?

Options:

A.

National Fire Prevention Agency

B.

National Flammable Protection Act

C.

National Fire Protection Association

D.

National Firefighter & Paramedic Alliance

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Questions 77

What is a limiting factor when specifying the height of a rack / enclosure?

Options:

A.

Cable capacity

B.

Cooling requirements

C.

Overhead fire sprinklers

D.

Enclosure door clearance

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Questions 78

What are the three basic physical security categories that describe technologies for personnel identification? (Choose three.)

Options:

A.

Who you are

B.

Where you are

C.

What you have

D.

Who you know

E.

What you know

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Questions 79

According to the Ideal Gas Law, as the pressure inside a balloon increases to a point that it exceeds the pressure on the outside of the balloon, which property of the balloon also increases?

Options:

A.

Color Intensity

B.

Density

C.

Volume

D.

Temperature

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Questions 80

In order to determine the most appropriate UPS configuration for your business, which two factors should be considered? (Choose two.)

Options:

A.

How long recovery from failure will take

B.

How many employees will support the UPS

C.

How much money is budgeted for IT equipment

D.

How much money is flowing through the company every minute

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Questions 81

Which access method is used for channeling high traffic through a security checkpoint?

Options:

A.

Coded lock

B.

Ordinary key

C.

Fingerprint reader

D.

Contactless smart card

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Questions 82

What is the primary purpose of a UPS?

Options:

A.

To remove transients from the power path

B.

To detect and report power factor problems

C.

To provide battery backup power should the utility fail

D.

To convert from three-phase power to Single-phase power

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Questions 83

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

Options:

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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Questions 84

What is the most cost effective UPS configuration for a company that operates 8 hours a day, 5 days a week and requires redundancy?

Options:

A.

Capacity

B.

System + system

C.

Parallel redundant

D.

Distributed redundant

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Questions 85

What represents the optimum scenario for investing in network-critical physical infrastructure (NCPI) technologies?

Options:

A.

NCPI cost is low and the risk/cost of downtime is high.

B.

NCPI cost is high and the risk/cost of downtime is low.

C.

The projected cost of downtime has not yet been established.

D.

Oversize the initial NCPI investment to minimize the possibility of downtime.

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Questions 86

Which three timeframes are included in MTTR? (Choose three.)

Options:

A.

The time to repair the system

B.

The time to diagnose a failure

C.

The time to assess the financial impact

D.

The time to write the failure resolution report

E.

The time to get the service technician onsite

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Questions 87

Which statement describes a difference between fiber and copper cabling?

Options:

A.

Signals transmit further over fiber than copper.

B.

Fiber is prone to electrical interference but copper is not.

C.

Copper is more fragile than fiber when laying cable runs.

D.

Signals over copper can travel at speeds approaching the speed of light.

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Questions 88

What are three advantages of biometric access control? (Choose three.)

Options:

A.

Cannot be lost

B.

Inexpensive to deploy

C.

Difficult to fool the sensor

D.

Cannot be shared with others

E.

Always correctly identifies the user

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Questions 89

Which standard ensures physical compatibility between racks, enclosures, and rack mounted equipment?

Options:

A.

RoHS

B.

EIA-310

C.

NFPA 70

D.

ASTM A653

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Questions 90

What are the three basic principles of identification from LEAST secure (1) to MOST secure (3)?

Options:

A.

(1) what you know, (2) what you have, (3) who you are

B.

(1) what you know, (2) who you are, (3) what you have

C.

(1) what you have, (2) who you are, (3) what you know

D.

(1) what you have, (2) what you know, (3) who you are

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Questions 91

What is the function of a circuit breaker?

Options:

A.

To distribute power from the UPS to critical loads

B.

To filter harmonics caused by non-power factor corrected computer loads

C.

To protect electrical equipment from damage caused by overload or short circuit

D.

To balance the loads in the data center to prevent stray currents on the ground wire

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Questions 92

Which cooling architecture has the shortest air flow paths between the cooling unit and the IT equipment?

Options:

A.

Row

B.

Rack

C.

Room

D.

Building

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Questions 93

Click the Exhibit button.

This picture illustrates which type of cooling architecture?

Options:

A.

Rack

B.

Row

C.

Room

D.

Building

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Questions 94

Which suppression system is most common in existing data centers?"

Options:

A.

Water sprinkler system

B.

Halon total flooding system

C.

Carbon dioxide total flooding system

D.

Water mist mercury switch sensor system

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Questions 95

What are the three elements of the fire triangle? (Choose three.)

Options:

A.

Fuel

B.

Heat

C.

Smoke

D.

Oxygen

E.

Nitrogen

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Questions 96

What is an advantage of using racks with threaded holes?

Options:

A.

Eases repair

B.

Eases bolt alignment

C.

Supports several thread sizes

D.

Increases speed of deployment

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Questions 97

What is the actual vertical hole spacing (center-to-center) based on the EIA-310 standard for one mounting unit or U?

Options:

A.

25.40 mm (1 inch)

B.

50.80 mm (2 inches)

C.

38.10 mm (1.5 inches)

D.

44.45 mm (1.75 inches)

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Exam Code: DU0-001
Exam Name: Data Center University Associate Certification
Last Update: Nov 20, 2024
Questions: 324
$64  $159.99
$48  $119.99
$40  $99.99
buy now DU0-001