WorksheetsTopic 5 Quiz Review - Information Technologies
Total questions: 16
Worksheet time: 12mins
With the large number of devices communicating wirelessly these days, how are the signals kept from going to the wrong place?
Each device has an internal code that has to match the code of an incoming transmission.
Different devices operate on different wavelengths of the electromagnetic spectrum.
The signals are routed through the wireless network like a post office sorts mail by zip code.
Devices with larger antennae use higher frequencies and devices with smaller antennae use lower frequencies to communicate.
What differences are there between digital and analog recordings? Choose the TWO that apply.
Digital signals are continuous.
Analog signals are higher resolution because they are continuous.
Digital signals can be more easily stored electronically because they take up less storage space.
Analog signals consist of numerical values recorded at a specific time interval.
When describing technology, what does the software refer to?
the soft parts of the technology, such as the rubber coating around the wires
the antenna within the technology that sends and receives the data
the procesor that controls the physical parts of the technology
the programming that makes the physical parts of the technology run
When describing technology, what does the hardware refer to?
the physical components of the computer, such as the circuit boards and processors
the information stored in binary code
the code that controls the physical parts of the technology
the programming that makes the physical parts of the technology run
If you want to convert an analog recording into a digital signal, what could you do to get the highest quality digital signal from the analog recording?
lower the amplitude of the analog signal
the increase the amplitude of the analog signal stored in binary code
lower the sampling rate of the analog signal
increase the sampling rate of the analog signal
What advantages do electromagnetic signals have over electronic signals?
electromagnetic signals are sent over wires
electromagnetic signals are faster and can be sent wirelessly
electronic signals cannot transmit information
electronic signals are less reliable
What is the benefit of reducing the number of pixels in a digital image?
it would use less storage space
it would provide better quality
it would be better for creating large posters
it is less boxy-looking
Mark plays a song on a guitar. It is recorded using a microphone, and the information is encoded into binary code and stored on a hard drive. Mark then uploads the song on his website and plays it for his family. When is the song a digital signal?
The entire time.
When he plays the song back for his family.
When it is encoded as binary, stored on his hard drive and uploaded on his website.
Only when it is uploaded to the website.
Analog signals are sampled at _________.
a continuous rate
a coding rate
a digital rate
a sampling rate
Which type of signal would be more difficult to erase the noise from?
analog, because it is a continuous signal and the noise is blended in
digital, because it is a continuous signal and the noise is blended in
both, because analog and digital signals are both continuous and the noise is blended in
Which statement best describes the two signals?
Both signals were likely analog.
Both signals were likely digital.
The top signal was likely analog and the bottom signal was likely digital.
The top signal was likely digital and the bottom signal was likely analog.
Which of the following are advantages of transmitting a digital signal from a recording studio to someone's computer?
Only digital signals can be recorded.
Only digital signals can be transmitted through wires.
Digital singals can be recorded in smaller files, copied more easily and transmitted more quickly.
Digital signals better reflect the original sound waves produced by the singer.
Morse code is an example of which type of signal?
analog
digital
noise
QED
Which of the following would make a digital signal more closely resemble an original analog signal?
Increasing the bandwidth
Increasing the sampling rate
Decreasing the bandwidth
Decreasing the sampling rate
What is noise in a signal?
random signals from the environment
intentionally collected information
What does the bandwidth describe?
the amount of information that can be transmitted
the size of the cell phone
the distance around the bands
the length of the wire used to send electronic signals
