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NCTI Tech I to Tech II Practice Exam Questions With Well Detailed Answers 2023
NCTI Tech I to Tech II Practice Exam Questions With Well Detailed Answers 2023
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Voorbeeld 2 van de 12 pagina's
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NCTI Tech I to Tech II Practice ExamQuestions With Well Detailed Answers
2023
Determining whether the cause of a problem is to one side or the other of a specific
device describes what type of troubleshooting method? - AnswerThe divide-and-
conquer method of troubleshooting determines whether a problem is to one side or the
other of a particular device.
What are the characteristics of a successful troubleshooter? Please provide a few more
of your own. - AnswerThe characteristics of a good troubleshooter include the desire to
solve problems and fix things, the know-how to use a variety of pieces of test
equipment, accuracy in documenting measurement results, and the pride in your work
that prevents you from settling for marginal results.
When considering which types of signal impairments can cause tiling artifacts on a
digital video channel, in what step of the six-step troubleshooting process is the
technician is most likely use? - AnswerThe technician is most likely to use Step 2.
Analyzing the Situation, when considering which types of signal impairments can cause
tiling artifacts on a digital video channel.
What is the best way to tell if a basic digital-to-analog converter is defective? -
AnswerTry the suspect converter on a different outlet or install a known "good"
converter on the suspect outlet and see if it works. If it works on the second outlet, then
the original outlet must be repaired. If the known "good" converter works on the original
outlet, then the original converter is defective.
What happens to an set-top box (STB) after it is plugged in? - AnswerThe STB heats up
after it is plugged in, which changes its performance.
List likely causes of remote control problems? - AnswerLikely causes of remote control
problems include: (1) A blocked line of sight between the remote control and the set-top
box (STB); (2) a defective STB; (3) weak or dead batteries in the remote control; (4) a
deprogrammed remote control; or (5) a defective remote control.
Are certain features included in specific version releases of High-Definition Multimedia
Interface (HDMI) guaranteed to work? - AnswerA particular HDMI version does not
guarantee a particular set of features because features are optional for the
manufacturer.
Although capable of delivering a high-definition (HD) signal, what are some limitations of
a component video signal? - AnswerSome limitations of a component video signal are
, that it is analog, it requires manual adjustment of resolution settings between the STB
and TV set, and it may not provide an HD signal out of some Blu-ray players
manufactured after 2010.
When using a digital video interface (DVI) connection and there is no audio, what is a
likely cause? - AnswerUnlike RF or High-Definition Multimedia Interface (HDMI)
connections, DVI connections requires a separate audio connection.
What is the intent of the Commercial Advertisement Loudness Mitigation (CALM) Act? -
AnswerThe intent of the CALM Act is to keep TV commercials from being louder than
the associated television program.
List some reasons why a customer may not be able to order video-on-demand (VOD). -
AnswerThe customer's credit limit has been reached, the customer's account is in a
delinquent status, the proper service codes have not been downloaded to the STB,
there are problems with the forward or return signals all are reasons that may keep a
customer from ordering VOD.
What can be done to keep recorded programming from being overwritten by new
recordings? - AnswerChange record settings in the set-top box (STB) to keep recorded
programming from being overwritten by new recordings.
How does a Multimedia over Coax Alliance (MoCA) filter alleviate potential problems
with the MoCA service? - AnswerA MoCA filter alleviates potential MoCA service
problems by keeping interference from MoCA signals inside as well as outside the
premises wiring, it creates a strong MoCA signal through advantageous reflections, and
mitigates harmful reflections from distant non-compliant devices.
How is availability different from reliability? - AnswerAvailability is the ratio of time that a
device, system, network, or service is available for use to total time. Reliability is the
probability that a system or device will not fail during a specified period.
What is the benefit of using quality of experience (QoE) compared to quality of service
(QoS)? - AnswerQoE is a subjective perception of digital video quality, whereas QoS is
a measure of objective network data.
What is the mean opinion score (MOS) grading scale? - Answer5 - Perfect. 4 - Fair;
imperfections can be seen but they are not too common as to be irritating. 3 - Artifacts
appear often enough to be annoying. 2 - Very annoying; nearly impossible to watch
anymore. 1 - No image.
What are perceptual quality metrics (PQM) used for? - AnswerPQM are objective
metrics of human visual perception based on statistical analysis of quality of service
measurements and MPEG encoding data.
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