ROC II, Course I: Lesson Quizzes Only Latest 2024/2025 Updated Questions and Answers Guaranteed 100% Success.
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ROC II, Course I:
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ROC II, Course I:
Why are NAND and NOR gates the most used logic gates and categorized as universal gates? - in
combinations of two or three, they can be configured to construct any other logic gate
What position in the American Standard Code for Information Interchange (ASCII) character string is a
single parity...
ROC II, Course I: Lesson Quizzes Only
Why are NAND and NOR gates the most used logic gates and categorized as universal gates? - in
combinations of two or three, they can be configured to construct any other logic gate
What position in the American Standard Code for Information Interchange (ASCII) character string is a
single parity bit added? - the eighth-bit position to become the most significant bit (MSB)
Why is the transmission control protocol (TCP) unsuitable for voice over Internet protocol (VoIP)
applications? - TCP created delays from sequencing, error correction, acknowledgements, etc,
which are unacceptable for a quality telephone call
Which was the first version of the Data Over Cable Service Interface Specification (DOCSIS) that enabled
multiple downstream and upstream channels to be used to transport data to and from a single modem?
- DOCSIS 3.0
Which generation of wireless access technology is operation in the millimeter frequency band around 30
GHz being considered? - 5G for the fifth generation
Which is the only 802.11 series of standards that operate at 900 MHz for reliable, slower-throughput
connectivity with Internet of Things (IoT) sensors in the customer's home? - 802.11ah
Voice activated personal assistants are always listening for commands, but are programmed to respond
only when hearing what? - a wake word, such as the assistant's name
What technology is plain old telephone service (POTS) built on? - circuit switching
What does a cell phone seek when it tunes to its control channel frequency? - the system
identification code (SID) assigned to the phone
,How is the perception of three-dimensional high definition TV (3D HDTV) created? - by displaying
an image from two slightly different angles, like a pair of human eyes
High-dynamic range (HDR) video calls for a minimum color depth of 10-bits, which provides up to how
many shades of each color? - 1,024
In what applications are broadband cable operators implementing Internet protocol TV (IPTV)
technology? - in TV everywhere applications
How many base-10 numbers can be expressed with two digits? - 99
What is the decimal range of an 8-bit binary number? - 0-255
What form of compression is Huffman coding? - lossless
In what scenario does an AND gate have a logical 1 output? - when all inputs are logical 1
What characterizes an OR gate? - its output is always logical 1, unless all inputs are logical 0
In a NAND gate, what reverses the voltage state from that of an AND gate? - the NOT gate that
follows that AND gate
Which logic gate combines different logic gates to act as a logical either/or operator? - the
exclusive-OR (XOR) gate
Which logic gate acts as a logical either/or operator followed by a NOT gate? - the exclusive-NOR
(XNOR) gate
What geometric shape is a sine wave based upon? - a right-degree triangle
, What is the ideal sampling rate for any analog signal? - twice the highest frequency perceived by
the human eyes and ears
What does quantizing do? - it rounds the values of sampled voltage levels to the closest numeric
value in a numeric set
In the audio compression coding schemes defined by ITU-T G.711 that compress 16-bit linear data down
to 8-bit logarithmic data, what does the most significant bit (MSB), bit 1, identify? - the segment
polarity
For quadrature phase shift keying (QPSK), how many bits are in each symbol? - 2 bits
What is the purpose of the forward error correction (FEC) interleaving layer? - to reduce the
probability of an impairment event corrupting more than one bit in a string
Why is randomizing included in the forward error correction (FEC) process? - to help the receiver
maintain synchronization with the modulator
How does Trellis coding provide error correction? - it adjusts the symbol transitions to a robust
set, enabling the receiver decoder to calculate the most probable transition, even if the received data is
corrupt
In which forward error correction (FEC) stage does an algorithm calculate a 3-bit binary code that is
transmitted as the 8-level symbols of eight-level vestigial sideband (8-VSB)? - the trellis encoder
stage
Which signal parameters can be viewed in the frequency domain? - channel amplitude,
bandwidth, and nearby impairments
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