1
Answers to Review Questions.
“Digita
l Media Primer” Yue
–
Li
ng Wong
“Digital Media Primer” Yue-Ling Wong,
Answers to Review Questions
Chapter 1
When applicable, please select all correct answers.
1. Digital data is _____ and analog information is _____.
A. continuous; discrete
B. discrete; continuous
3. Converting from analog to digital involves a two-step process: _____ and _____.
4. When analog information is converted to digital data, we must consider two properties that affect the
exactness of the digital representation, one from sampling and one from quantizing. Which of the following is
from sampling?
5. Which of the following refers to the number of allowable levels of digitized data?
A. sampling rate
B. bit depth
6. Which of the following can reduce the file size of digital media?
7. Our everyday decimal numbering system is base- _____. Computers use base-_____ , which is also known as
the _____ numbering system.
8. The smallest unit in a binary system is a _____ ,
A. bit
B. byte
which refers to a binary digit (i.e., a _____ or a _____.) (Enter a digit or number.)
9. Fill in the _.
11. If you want to use hand signals to communicate only two possibilities yes or no to your friend, what is
the minimum number of fingers you need? _____.
12. A pixel that can have only one of two possible color values requires _____ bit(s) to store the color
information.
13. If you use a byte to store the grayscale information of each pixel in a grayscale image, how many gray
levels are possible for each pixel?
14. How many bits are in the binary notation 0011010? How many possible values can this many bits
represent?
15. Which of the following sizes is the largest?
16. Fill in the names and abbreviations for the following:
Abbr.
Size in bytes
17. How many bits is each of the following binary numbers? Also, convert each to a decimal number.
i. 00000000
ii. 0000
iii. 01101000
iv. 0110100
v. 11
vi. 111
vii. 0000000000000010
18. Convert the following decimal numbers into binary.
i. 0
ii. 1
19. i. Name three general strategies to reduce the size of a digital media file.
ii. Which of these strategies does not necessarily sacrifice the quality of the media file? Why?
20. You should avoid using lossy compression for any file that you want to keep as the start file for further
editing because _____.