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NCTI Tech I to Tech II exam 2023 with 100% correct answers
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NCTI Tech I to Tech II
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Voorbeeld 2 van de 14 pagina's
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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.
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