Difference between revisions of "CSC111 Mid-Semester Review 2018"

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[[Image:TheAnswerPad.png|right|150px]]
 
[[Image:TheAnswerPad.png|right|150px]]
 
* We'll use a clicker (The Answer-Pad) during this review.  Go to [http://app.theanswerpad.com/student#interactive http://app.theanswerpad.com/student] to answer various questions.
 
* We'll use a clicker (The Answer-Pad) during this review.  Go to [http://app.theanswerpad.com/student#interactive http://app.theanswerpad.com/student] to answer various questions.
 +
 +
=Format=
 +
 +
* What is printed by this statement?
 +
 
 +
print( "({0:3}) {1:3}-{2:4}".format( "413", "584", "3854" ) )
 +
 +
* What is output by this statement?
 +
 +
print( "({0:1}) {1:1}-{2:1}".format( "413", "584", "3854" ) )
 +
 +
* What is output by this statement?
 +
 +
print( "({1:3}) {0:3}-{2:4}".format( "413", "584", "3854" ) )
 +
  
 
=Range=
 
=Range=
Line 45: Line 60:
  
 
=Functions=
 
=Functions=
 +
 +
* Is this function valid (i.e. Python will not report an error if it finds it in our program)?
 +
::<source lang="python">
 +
def doNothing( a ):
 +
    return 1
 +
</source>
 +
* What is <tt>None</tt>?
 +
* Is this function valid?
 +
::<source lang="python">
 +
def doNothing2( a ):
 +
    return
 +
</source>
 +
* The output of this program is 7.  What did the user enter?
 +
::<source lang="python">
 +
def f1( a, b ):
 +
    return a - b
 +
 +
x = eval( input( "> " ) )
 +
print( f1( x, 3 ) )
 +
</source>
 +
* The output of this program is 5.  What did the user enter?
 +
::<source lang="python">
 +
def f2( y, x ):
 +
    return y - x
 +
 +
x = eval( input( "> " ) )
 +
y = 10
 +
print( f2( x, y ) )
 +
</source>
 +
* What is printed by the program?
 +
::<source lang="python">
 +
def f2( y, x ):
 +
    z = 4
 +
    return y - x
 +
 +
print( f2( 5, 3 ) )
 +
print( z )
 +
</source>

Latest revision as of 20:33, 4 March 2018

D. Thiebaut (talk) 19:17, 4 March 2018 (EST)

Preparation

TheAnswerPad.png

Format

  • What is printed by this statement?
print( "({0:3}) {1:3}-{2:4}".format( "413", "584", "3854" ) )
  • What is output by this statement?
print( "({0:1}) {1:1}-{2:1}".format( "413", "584", "3854" ) )
  • What is output by this statement?
print( "({1:3}) {0:3}-{2:4}".format( "413", "584", "3854" ) )

Range

  • Is range a function?
  • How many parameters does it take?
  • What are they?
  • Can range crash if we give it incompatible parameters?
  • Can its parameters be variables? i.e. range( a, b, c)?
  • When is range() useful?

Lists

  • How are lists defined?
  • What different symbols are used to define lists?
  • Can we mix the symbols to open and close the list?
  • Can lists be empty? If so, give examples of empty lists.
  • Can list elements be of different types? Can a list element be another list?
  • Can list grow? How?
  • How can we replace the first element of a non-empty list with a different value?
  • How can we remove the first element of a non-empty list?
  • How can we remove the last element of a non-empty list?
  • How can we create a list that is the concatenation of two lists?

Strings

  • Are strings mutable?
  • is 
a = ""
a valid string?
  • How can we remove the first letter of a non-empty string?
  • How can we remove the last letter of a non-empty string?
  • How can we create the reverse of a string ("hello" --> "olleh")
  • How do we go from "The quick red fox" to [ "The", "quick", "red", "fox"]?
  • How do we go from " The quick red fox " to [ "The", "quick", "red", "fox"]?
  • How do we print the first word of a sentence, i.e. extract "Viva" from the string "Viva Fresh Pasta"?
  • Give the name of 5 string methods

Functions

  • Is this function valid (i.e. Python will not report an error if it finds it in our program)?
 def doNothing( a ):
     return 1
  • What is None?
  • Is this function valid?
 def doNothing2( a ):
     return
  • The output of this program is 7. What did the user enter?
def f1( a, b ):
    return a - b

x = eval( input( "> " ) )
print( f1( x, 3 ) )
  • The output of this program is 5. What did the user enter?
def f2( y, x ):
    return y - x

x = eval( input( "> " ) )
y = 10
print( f2( x, y ) )
  • What is printed by the program?
def f2( y, x ):
    z = 4
    return y - x

print( f2( 5, 3 ) )
print( z )
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