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DU0-001 Data Center University Associate Certification Questions and Answers

Questions 4

During a power outage, a retail store 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 5

Tracking achievement against agreed upon service levels is an example of which specific management process?

Options:

A.

Planned down time

B.

Infrastructure improvement

C.

Availability metrics reporting

D.

Advanced warning for failure

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Questions 6

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 7

What percentage of electricity used to power IT equipment is typically converted into heat?

Options:

A.

85%

B.

90%

C.

95%

D.

99%

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Questions 8

"The degree to which a system or component is operational and accessible when required for use" is the definition for which term?

Options:

A.

Reliability

B.

Availability

C.

Serviceability

D.

Maintainability

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Questions 9

MTTR is presented in which format?

Options:

A.

Hours

B.

Weight

C.

Fraction

D.

Distance

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Questions 10

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

Options:

A.

Volume

B.

Viscosity

C.

Pressure

D.

Conductivity

E.

Temperature

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Questions 11

What are three characteristics of a water mist suppression system? (Choose three.)

Options:

A.

Requires manual activation

B.

Uses minimal storage space

C.

Discharges very fine water droplets

D.

Is popular in industrial environments

E.

Extinguishes fire by absorbing oxygen

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Questions 12

Which management challenge can provide advance warning for failure?

Options:

A.

Change management

B.

Incident management

C.

Capacity management

D.

Availability management

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Questions 13

How do enclosures improve rack system cooling?

Options:

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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Questions 14

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 15

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 16

Typical data centers function to what percent of their capacity?

Options:

A.

10%

B.

33%

C.

66%

D.

75%

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Questions 17

What is the highest cost UPS configuration?

Options:

A.

System + system

B.

Parallel redundant

C.

Isolated redundant

D.

Distributed redundant

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Questions 18

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 19

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 20

How do blanking panels improve cooling within an enclosure?

Options:

A.

By increasing the mixture of hot and cold air

B.

By increasing air intake through vented doors

C.

By directing exhaust heat into IT equipment intakes

D.

By limiting the recirculation of air into IT equipment

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Questions 21

What does the term "short cycling" mean?

Options:

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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Questions 22

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

Options:

A.

Condensation > evaporation > expansion > compression

B.

Compression > condensation > evaporation > expansion

C.

Evaporation > expansion > condensation > compression

D.

Evaporation > compression > condensation > expansion

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Questions 23

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

Options:

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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Questions 24

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 25

Which two clean agents are commonly specified for data center fire suppression? (Choose two.)

Options:

A.

Inergen

B.

FE-130

C.

FM-200

D.

Halon 1211

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Questions 26

Which benefit is provided when air distribution methods return the warmest air to the CRAC units?

Options:

A.

Decreased heat load in the data center

B.

Increased capacity of the cooling system

C.

Maximized mixing of supply and return air

D.

Elimination of resistance created by underfloor cables

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Questions 27

What characteristic is common to all cooling architectures?

Options:

A.

Deployable with on a raised floor

B.

Top or bottom airflow configuration

C.

Cooling equipment occupies white space

D.

Easily adaptable with changes in infrastructure

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Questions 28

Standby generators typically use which type of engine?

Options:

A.

Rotary

B.

Turbine

C.

Two-stroke

D.

Four-stroke

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Questions 29

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 30

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

Options:

A.

Water cooled system

B.

Glycol cooled system

C.

Air cooled DX system

D.

Air cooled self-contained system

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Questions 31

Click the Exhibit button.

Which type of power problem is illustrated in the exhibit?

Options:

A.

Harmonics

B.

Overvoltage

C.

Overcurrent

D.

Frequency variation

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Questions 32

Consider a data center installation where circuit panels are installed at the end of each row of IT racks. Conduit is then run from power distribution units (PDUs) to the circuit panels and then to a subset of connections to the racks.

What are the two primary advantages to this power cabling approach? (Choose two.)

Options:

A.

It improves electrical efficiency.

B.

Shorter electrical conduit makes it easier to manage.

C.

It is more resistant to physical accident in the data center.

D.

It is compatible of with all makes and models of racks / enclosures.

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Questions 33

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

Options:

A.

Seismic enclosure

B.

600 mm enclosures

C.

750 mm enclosures

D.

Wall-mount enclosures

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Questions 34

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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Questions 35

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

Options:

A.

Lightning strikes

B.

Generator switch-over

C.

Air conditioner starting up

D.

Electrostatic discharge (ESD)

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Questions 36

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

Options:

A.

Network cabling

B.

Storage disk arrays

C.

Rack-mounted UPS

D.

Shelf-mounted tower servers

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Questions 37

Which type of rack / enclosure would you select if you wanted to rely on natural convection to dissipate heat from your equipment?

Options:

A.

Open frame rack

B.

Seismic enclosure

C.

Enclosure with perforated doors

D.

Enclosure with rack-mounted fans

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Questions 38

In fire suppression systems, which two clean agents are composed entirely of inert gas(es)? (Choose two.)

Options:

A.

FE-13

B.

Inergen

C.

FM-200

D.

Carbon dioxide

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Questions 39

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 40

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 41

Why are dry chemical fire extinguishers a poor practice for data center fire protection?

Options:

A.

They set off smoke alarms.

B.

They are corrosive to IT equipment.

C.

They cause condensation on equipment.

D.

They are ineffective against electrical fires.

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Questions 42

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 43

What is the purpose of grounding?

Options:

A.

To protect against electric shock

B.

To step down 208 V power to 120 V power

C.

To maintain the voltage during neutral wire bonding

D.

To provide a path for the Ground Fault Interrupt (GFI) circuit

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Questions 44

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 45

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

Options:

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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Questions 46

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 47

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?

Options:

A.

Row

B.

Rack

C.

Room

D.

Ceiling

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Questions 48

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

Options:

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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Exam Code: DU0-001
Exam Name: Data Center University Associate Certification
Last Update: May 11, 2024
Questions: 325
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