Question 1
Which of the following are examples of analog devices?
a) Mercury thermometer
b) Traditional photograph camera (film camera)
c) Videocassette (VHS or Betamax)
d) All of the above
Question
2
Which of th
...
Question 1
Which of the following are examples of analog devices?
a) Mercury thermometer
b) Traditional photograph camera (film camera)
c) Videocassette (VHS or Betamax)
d) All of the above
Question
2
Which of the following are examples of digital devices?
a) Mercury thermometer
b) Traditional photograph camera
c) Computer
d) Both b and c
Question
3
A 512 KB digital file stored on a hard disk contains ____________________ MB (Megabytes).
Please give a numeric answer including comas and no decimals.
Answer: 05 MB (0.5, 0.5 MB)
Question 4
Following the example of the speedometer form the lecture on “Understanding the Digital Domain”, if
we want to use 256 possible values for the speed (from o Km/h to 255 km/h), how many bits should the
rounded-off binary code contain?
Answer: 8
Question 5
Which of the following are examples of transmission media used to transport electrical signals?
Copper wire.
Fiber optic cable
None of the above
All of the above
Question 6
Calculate the data rate if the bit period of a signal is 0.000000625 s.
a) 160 Kbps.
b) 1.6 Kbps.
c) 16 Kbps
d) 16 Mbps.
e) 1.6 Mbps.
Question
7
Calculate the bit period of a signal if the data rate is 2.5 Kbps.
a) 0.0004 s
b) 0.0000004 s
c) 0.004 s
d) 0.4 s
Question
8
Which of the following are advantages of the digital domain?
a) Ability for noise removal
b) Vulnerability to the addition of noise
c) Ability for compression
d) Both a) and c)
e) None of the above
Question
9
When music is recorded on a DVD-Audio, a digital recording device samples the sound 96,000 times per
second. Each sample is 3 bytes (24 bits) long, and a separate sample is taken for each of the two
speakers in a stereo system. Therefore to store a song of two and a half minutes long, the digital
recording device requires _________________KB(kilobytes) of memory.
Assume no compression is used.
a) 86,400
b) 2,756.25
c) 84,375
d) None of the above
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