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NCTI Tech I to Tech II Question and answers already passed 2023
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NCTI Tech I to Tech II Question and answers already passed 2023
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NCTI Tech I to Tech IIDetermining whether the cause of a problem is to one side or the other of a specific
device describes what type of troubleshooting method? - correct answer The 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. - correct answer The 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? - correct answer The 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? - correct
answer Try 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? - correct answer The
STB heats up after it is plugged in, which changes its performance.
List likely causes of remote control problems? - correct answer Likely 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? - correct answer A 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? - correct answer Some 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? - correct answer Unlike 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? -
correct answer The 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). -
correct answer The 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? - correct answer Change 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? - correct answer A 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? - correct answer Availability 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)? - correct answer QoE 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? - correct answer 5 - 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? - correct answer PQM are
objective metrics of human visual perception based on statistical analysis of quality of
service measurements and MPEG encoding data.
How many pixels are color-averaged in a 4:2:2 profile? - correct answer In a 4:2:2
profile, the colors from two pixels are averaged together and the resulting color fills
those two pixels.
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