Where weve been

1
Where weve been
2

• How many bits are required to store the number
  256?
• a.      3
• b.     8
• c.      9
• d.     10

3

• In a balanced tree with 8 leaf nodes, how many
  steps will it take to reach a leaf?
• a. 1
• b. 2
• c. 3
• d. 4

4

• A URL specifies
• The protocol to be used to download the web page
• The domain name of the web server that contains
  the web page
• The path of the web page on the web server
• All of the above
• Both (b) and (c)

5

• What does the following program compute?
• A 0
• B 0
• for R firstRow to lastRow
• For C firstCol to lastCol
• A A SheetR,C
• B B1
• C A/B
• Computes the sum of all the numbers in Sheet
• Computes the average of all the numbers in Sheet
• Computes the standard deviation of all the
  numbers in Sheet
• Finds the maximum value of all the numbers in
  Sheet.

6

• Suppose you have a continuous tone image of a
  cat, and you would like to digitize it. Which of
  the following would tend to improve the quality
  of the resulting digital image?
• a. increasing the resolution
• b. decreasing the number of samples taken for
  each pixel
• c.      increasing the dynamic range
• d.     all of the above
• e.      a and b
• f.       b and c
• g.      a and c

7

• Which of the images is generated by the following
  HTML file?
•  
• lthtmlgt
• ltscriptgt
• inWord "the"
• theWord "In"
• begWord "beginning"
• alert(theWordbegWord)
• lt/scriptgt
• lt/htmlgt

8

• The following HTML file generates the example
  form. Suppose that the user was to click on the
  Hello check box (where the arrow is pointing).
  Which of the image choices below would be
  generated?
•  
• lthtmlgt
• ltscriptgt
• function whenClicked()
• document.aForm.msg.value"say "
• document.aForm.hello.checked
• lt/scriptgt
• lth2gtTry thislt/h2gt
• ltform name"aForm"gt
• ltinput type"checkbox" name"hello"gtHello
• ltbrgtltinput type"checkbox" name"bye"gtGood-bye
• ltbrgtMessage ltinput type"text" name"msg"gt
• lt/formgt
• lt/htmlgt

Answer Hello box becomes checked, nothing else
happens
9
How many arguments does the function have?

• function doSomethingElse(value, num)      if
  (value lt 5)                 return num - 1
             else                 return num
  1      

Answer 2
10
What is the value returned by the function?

• function doSomething(number, firstName,
  lastName)      var message      if (number
  1)           message "Hello"      
       else           message "Goodbye"
             message message " " firstName
  " " lastName      alert(message)
• return message
• doSomething(1,"Fred","Flintstone") ?

Answer Hello Fred Flintstone
11

• Object representations of pictures are?
• a.     easy to create but difficult to edit
• b. more difficult to edit than pixel
  representations of pictures
• c.     easier to edit than pixel representations
  of pictures
• d. difficult to create and difficult to edit

12

• Which of the following picture types uses indexed
  color?
• a.      .gif
• b.     .jpeg
• c.      .png
• d.     .bmp

13

• Computer screens and televisions use an
• a.     additive color model
• b.     subtractive color model
• c.     hue, saturation and brightness model
• d.     none of the above

14

• Inkjet and other printers use a
• a.     additive color model
• b.     subtractive color model
• c.     hue, saturation and brightness model
• d.     none of the above

15

• Suppose you have an RGB color image, and for each
  pixel there are 256 possible values of red, 256
  possible values of green, and 256 possible values
  of blue. How many bits are required to store the
  value of each pixel?
• a.     1
• b.     3
• c.     8
• d.     24
•  

16

• The following HTML script can generate the image
  below it. What will happen after the user clicks
  on Hide (where the arrow is pointing)?
•  
• lthtmlgt
• lth2gtClick taglt/h2gt
• ltform name"aForm"gt
• ltinput type"checkbox" name"say"gtIt
• ltbrgtltinput type"checkbox" name"say"gtNot It
• ltbrgtltinput type"checkbox" name"do"gtRun
• ltbrgtltinput type"checkbox" name"do"gtSafe
• ltbrgtltinput type"checkbox" name"do"
• onClick"document.aForm.say1.checkedtrue"gtHi
  de
• lt/formgt
• lt/htmlgt

Answer Hide becomes unchecked, Not It becomes
checked
17

• Suppose that you have an uncompressed 256x256 RGB
  color image in which each row of pixels is a
  different color (a total of 256 different
  colors). How many bytes would be required to
  store this image?
• 512
• 65,536
• 131,072
• 196,608

18

• Now suppose that you compress the file from the
  previous question using run-length encoding. How
  many bytes would be required to store the
  compressed image?
• 512
• 768
• 1024
• 1280

19

• This time take the (uncompressed) image and
  compress it using run-length encoding with
  indexed color. How many bytes would be required
  to store the compressed image?
• 512
• 768
• 1024
• 1280