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