EXTRON UPDATED ACTUAL QUESTIONS WITH
CORRECT ANSWERS
Question 1.
Which of the following is a multipurpose interface for connecting peripheral devices such as a mouse,
keyboard, printer, scanner, or flash drive to a computer for communication?
ANSWER
USB
Question 2.
When the angle at which light strikes the cladding is low enough, what occurs when all of the light is
reflected back into the core?
ANSWER
Total Internal Reflection
Question 3.
Which one of the following is the smallest component of a screen image, composed of individual Red,
Green, and Blue - RGB primary colors?
ANSWER
Pixels
Question 4.
Which one of the following OSI Reference layers provides logical IP addressing for all devices that
communicate over a network?
ANSWER
Network Layer 3
Question 5.
Which of the following determines how much a cable can hold an electrical charge, expressed in
picofarads per foot (pF/ft)?
ANSWER
Capacitance
,Question 6.
Which of the following light sources have a low power output, and wide spectral width that radiates
out in all directions, like a light bulb?
ANSWER
LED
Question 7.
Which one of the following is a method of transporting media content over a network as a steady,
continuous flow, allowing playback to proceed while subsequent data is received?
ANSWER
Streaming
Question 8.
Interlaced scanning may be described as:
ANSWER
Images drawn in two alternate fields as odd & even numbered lines
Question 9.
Which one of the following creates a permanent joint between the ends of two fibers by mechanically
joining them or fusing together with heat?
ANSWER
Splices
Question 10.
Which of the following work as transmitter and receiver pairs to facilitate digital signal transmission
over long distances via shielded or unshielded twisted pair, or fiber optic cable?
ANSWER
Extenders
, Question 11.
Which of the following control methods is a wireless one-way interface designed to control a single
device?
ANSWER
Infrared
Question 12.
Adjacent wires within an improperly shielded cable may internally experience which of the following?
ANSWER
Crosstalk
Question 13.
Which of the following carries two independent channels for left and right audio, and creates the
impression of sound heard from various directions?
ANSWER
Stereo sound signals
Question 14.
Which of the following is the average rate of speed at which sound travels through air, measured at
sea level and 70F/20C degrees?
ANSWER
1128 feet/second (343 meters/second)
Question 15.
Which of the following is the smallest component of a digital image, composed of individual Red,
Green, and Blue - RGB color elements?
ANSWER
Pixel
Question 16.
Which of the following is transmitted as electrical impulses of encoded data?
ANSWER
Signals
CORRECT ANSWERS
Question 1.
Which of the following is a multipurpose interface for connecting peripheral devices such as a mouse,
keyboard, printer, scanner, or flash drive to a computer for communication?
ANSWER
USB
Question 2.
When the angle at which light strikes the cladding is low enough, what occurs when all of the light is
reflected back into the core?
ANSWER
Total Internal Reflection
Question 3.
Which one of the following is the smallest component of a screen image, composed of individual Red,
Green, and Blue - RGB primary colors?
ANSWER
Pixels
Question 4.
Which one of the following OSI Reference layers provides logical IP addressing for all devices that
communicate over a network?
ANSWER
Network Layer 3
Question 5.
Which of the following determines how much a cable can hold an electrical charge, expressed in
picofarads per foot (pF/ft)?
ANSWER
Capacitance
,Question 6.
Which of the following light sources have a low power output, and wide spectral width that radiates
out in all directions, like a light bulb?
ANSWER
LED
Question 7.
Which one of the following is a method of transporting media content over a network as a steady,
continuous flow, allowing playback to proceed while subsequent data is received?
ANSWER
Streaming
Question 8.
Interlaced scanning may be described as:
ANSWER
Images drawn in two alternate fields as odd & even numbered lines
Question 9.
Which one of the following creates a permanent joint between the ends of two fibers by mechanically
joining them or fusing together with heat?
ANSWER
Splices
Question 10.
Which of the following work as transmitter and receiver pairs to facilitate digital signal transmission
over long distances via shielded or unshielded twisted pair, or fiber optic cable?
ANSWER
Extenders
, Question 11.
Which of the following control methods is a wireless one-way interface designed to control a single
device?
ANSWER
Infrared
Question 12.
Adjacent wires within an improperly shielded cable may internally experience which of the following?
ANSWER
Crosstalk
Question 13.
Which of the following carries two independent channels for left and right audio, and creates the
impression of sound heard from various directions?
ANSWER
Stereo sound signals
Question 14.
Which of the following is the average rate of speed at which sound travels through air, measured at
sea level and 70F/20C degrees?
ANSWER
1128 feet/second (343 meters/second)
Question 15.
Which of the following is the smallest component of a digital image, composed of individual Red,
Green, and Blue - RGB color elements?
ANSWER
Pixel
Question 16.
Which of the following is transmitted as electrical impulses of encoded data?
ANSWER
Signals
