NCTI - Installer UPDATED ACTUAL Questions And Correct Answers
C
Terms in this set (151)
Which of the following will strengthen signals as they B) Distribution amplifiers.
move farther away from the headend through the trunk
express system?
Which of the following describes a carrier wave? B) A wave with a much higher frequency than the input signal.
Which of the following describes modulation? B) The reshaping of a carrier wave to include information contained by an input
signal.
Which of the following is the symbol for power? W = watts
Which of the following describes the process of Sampling
measuring an analog signal at a specific interval?
Which of the following is true about the base 10 system? B) Digits 0 through 9 are used.
Which of the following best describes post bit-error-rate A) A measurement of all bit error after forward error correction has been applied.
(BER)?
Which of the following compression rates will enable six 6:1
digital programs to be transmitted rather than one analog
channel in a 6 MHz bandwidth?
At what modulation error ratio (MER) should a 256- 32db or greater
quadrature amplitude modulation (QAM) signal operate?
On the return path, signals from many sources must be B) Time division multiple access (TDMA).
sent on the same cable. What is the name of the
technique that allows the signals to be sent without
losing data integrity?
In a coaxial cable, what is the purpose of the shielding? C) Prevents ingress and egress.
Which of the following describes attenuation? A reduction in signal strength through a cable system.
Which of the following is a feature of multimode fiber? B) It is easier to handle and terminate than single-mode fiber.
Which of the following describes the structure of fiber- B) Drop fiber cables may use buffer tubes containing steel wire.
optic cable?
Which of the following is true about CAT-1 cabling? C) It is typically used in voice applications.
, Which of the following twisted-pair cable types is the A) CAT-5.
only one that is approved by certifying bodies for data
rates in excess of 10 Mbps?
Which of the following is responsible for reducing A) Number of twists.
crosstalk in twisted-pair cable?
Wireless networks use low-power RF signals; therefore, A) The greater the distance between wireless devices, the lower the signal
which of the following is true about signal strength? strength and data rate.
Which of the following is true about Wi-Fi technology? D) The connection between the router and modem is always wired.
What percentage does a cables attenuation increase or 1%
decrease for every 10° change in temperature?
Which of the following is a characteristic of high- D) Audio surround sound using Dolby Digital technology.
definition television (HDTV)?
Which type of screen display has been known to use a plasma
great deal of energy, can have a short lifespan, but has
high-contrast, vibrantly accurate color images?
Which TV digital format was originally designed for EDTV
progressive scan DVDs?
Which type of television display has a deeper cabinet, rear projector
which affects the size of the screen?
Which device enables customers to schedule recordings B) Digital video recorder (DVR). dvr
of television programs?
The cable modem termination system (CMTS) is one of B) Cable modem.
the two main components of DOCSIS architecture. What
is the other?
Which of the following is the CableLabs-led project built C) PacketCable.
to define the architecture for the delivery of real-time
Internet protocol (IP) applications?
A cable gateway typically includes a cable modem, C) Convert legacy DTV services being transported on QAM carriers to an IP
multiple quadrature amplitude modulation (QAM) tuners, format that can be received by IP devices.
a telephone interface, and a multiport and wireless
router. What is the function of the multiple quadrature
amplitude modulation (QAM) tuners?
What is the function of the central processing unit (CPU) A) It controls input, processing, storage, and output functions.
in a computer, laptop, or tablet?
Which operating system is used exclusively on a Mac OS X
computer?
C
Terms in this set (151)
Which of the following will strengthen signals as they B) Distribution amplifiers.
move farther away from the headend through the trunk
express system?
Which of the following describes a carrier wave? B) A wave with a much higher frequency than the input signal.
Which of the following describes modulation? B) The reshaping of a carrier wave to include information contained by an input
signal.
Which of the following is the symbol for power? W = watts
Which of the following describes the process of Sampling
measuring an analog signal at a specific interval?
Which of the following is true about the base 10 system? B) Digits 0 through 9 are used.
Which of the following best describes post bit-error-rate A) A measurement of all bit error after forward error correction has been applied.
(BER)?
Which of the following compression rates will enable six 6:1
digital programs to be transmitted rather than one analog
channel in a 6 MHz bandwidth?
At what modulation error ratio (MER) should a 256- 32db or greater
quadrature amplitude modulation (QAM) signal operate?
On the return path, signals from many sources must be B) Time division multiple access (TDMA).
sent on the same cable. What is the name of the
technique that allows the signals to be sent without
losing data integrity?
In a coaxial cable, what is the purpose of the shielding? C) Prevents ingress and egress.
Which of the following describes attenuation? A reduction in signal strength through a cable system.
Which of the following is a feature of multimode fiber? B) It is easier to handle and terminate than single-mode fiber.
Which of the following describes the structure of fiber- B) Drop fiber cables may use buffer tubes containing steel wire.
optic cable?
Which of the following is true about CAT-1 cabling? C) It is typically used in voice applications.
, Which of the following twisted-pair cable types is the A) CAT-5.
only one that is approved by certifying bodies for data
rates in excess of 10 Mbps?
Which of the following is responsible for reducing A) Number of twists.
crosstalk in twisted-pair cable?
Wireless networks use low-power RF signals; therefore, A) The greater the distance between wireless devices, the lower the signal
which of the following is true about signal strength? strength and data rate.
Which of the following is true about Wi-Fi technology? D) The connection between the router and modem is always wired.
What percentage does a cables attenuation increase or 1%
decrease for every 10° change in temperature?
Which of the following is a characteristic of high- D) Audio surround sound using Dolby Digital technology.
definition television (HDTV)?
Which type of screen display has been known to use a plasma
great deal of energy, can have a short lifespan, but has
high-contrast, vibrantly accurate color images?
Which TV digital format was originally designed for EDTV
progressive scan DVDs?
Which type of television display has a deeper cabinet, rear projector
which affects the size of the screen?
Which device enables customers to schedule recordings B) Digital video recorder (DVR). dvr
of television programs?
The cable modem termination system (CMTS) is one of B) Cable modem.
the two main components of DOCSIS architecture. What
is the other?
Which of the following is the CableLabs-led project built C) PacketCable.
to define the architecture for the delivery of real-time
Internet protocol (IP) applications?
A cable gateway typically includes a cable modem, C) Convert legacy DTV services being transported on QAM carriers to an IP
multiple quadrature amplitude modulation (QAM) tuners, format that can be received by IP devices.
a telephone interface, and a multiport and wireless
router. What is the function of the multiple quadrature
amplitude modulation (QAM) tuners?
What is the function of the central processing unit (CPU) A) It controls input, processing, storage, and output functions.
in a computer, laptop, or tablet?
Which operating system is used exclusively on a Mac OS X
computer?
