Data Center University Associate Certification (DU0-001) Practice Test

Questions # 51:

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

three.)

Options:

VESD protocols

User friendliness

Cost of equipment

Color of security hardware components

Likelihood of locking out legitimate users

Questions # 52:

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

Options:

A battery

An inverter

A transfer switch

A single-phase input

Questions # 53:

What is the most likely cause of unreliability in biometric technology?

Options:

Spoofing by an imposter

Failure of the scanning device

Failure to recognize a legitimate user

Incorrect recognition (user recognized as the wrong person)

Questions # 54:

What is the definition of reliability?

Options:

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

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

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

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

Questions # 55:

Which statement describes a difference between fiber and copper cabling?

Options:

Copper is generally less expensive than fiber for long runs.

Copper is generally less expensive than fiber for short runs.

Signals can be transmitted longer distances over copper than multi-mode fiber.

Signals can be transmitted longer distances over copper than single-mode fiber.

Questions # 56:

Which statement illustrates a characteristic of nominal voltage?

Options:

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

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

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

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

Questions # 57:

Which substance transfers heat most efficiently?

Options:

Gas

Solid

Liquid

Vapor

Questions # 58:

Click the Exhibit button.

Question # 58

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

Options:

DC offset

Overvoltage

Undervoltage

Harmonic distortion

Questions # 59:

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:

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

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

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

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.

Questions # 60:

Which NCPI component protects the data center during long duration outages (several hours to days)?

Options:

Generator

Static UPS

Flywheel UPS

Automatic transfer switch

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