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

Questions # 71:

Which type of humidification system rapidly vibrates water to create a fog or mist that is introduced into the air?

Options:

Infrared humidifier

Ultrasonic humidifier

Electromagnetic humidifier

Steam canister humidifier

Questions # 72:

What are three elements of the network-critical physical infrastructure (NCPI)? (Choose three.)

Questions # 73:

Which two statements describe the parallel redundant UPS configuration? (Choose two.)

Options:

It uses older and outdated technology.

The parallel redundant UPS configuration is not scalable.

If one UPS module goes down, the other UPS module(s) assumes the load.

Both modules must be the same design, manufacturer, rating, technology, and configuration.

Questions # 74:

What is the difference between reliability and availability?

Options:

MTTR is only factored into reliability.

MTBF is only factored into availability.

Reliability is composed of MTBF and MTTR.

Availability is composed of MTBF and MTTR.

Questions # 75:

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

Options:

Frequency variation helps server performance.

Computer power supplies are frequency tolerant.

Frequency variation is strictly a theoretical problem.

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

Questions # 76:

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

Options:

Obstructs airflow

Adds weight to servers

Requires the need for more cabling

Causes cable to exceed bend radius

Questions # 77:

Which two are characteristics of an agile data center? (Choose two.)

Options:

Provision a UPS module with a different power capacity.

Change out plug types when new IT equipment is installed.

Design for "worse case" capacity to prevent future downtime.

Have N+1 redundancy in part of the data center and 2N in another part based on equipment criticality.

Questions # 78:

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

Options:

Star

Ring

Tree

Wheel

Questions # 79:

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

Options:

Planned down time

Infrastructure improvement

Availability metrics reporting

Advanced warning for failure

Questions # 80:

What is a result of an undervoltage condition?

Options:

Transients

Motors overheating

Power distribution oversizing

UPS frequency compensation

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