SAQ 4.1

Using a for loop, we can iterate through the items of a Python list in either a "by item" or a "by index" manner.

• True

• False

This function is supposed to sum all of the elements in a list of numbers. Which of the following should replace the comment line?

def sumList(myList):

acc = 0

# what goes here?

acc = acc + myList[i]

return acc

•  

  for i in range(len(myList)):

• for acc in myList:

•  

  for myList:

•  

  for x in myList:

Assuming the parameter myList is a list of integers between zero and 100, what does this function return?

def foo(myList):

  x = -1

  for y in myList:

    if y > x:

      x = y

 

  return x

•  

  The second largest value in myList

•  

  The smallest value in myList

•  

  The second smallest value in myList

•  

  The largest value in myList

What is the output of this code?

myList = [-1, 4, 5, -3, 8, 4, 1, 0, -3, 0]

acc = 0

for i in myList:

  if i > 0:

    acc = acc + i

acc

•  

  -7

• 22

•  

  7

•  

  45

What is output by the following code?

changeList = [1, 2, "buckle my shoe", 3, 4, "shut the door"]

changeList[2] = "the sky is blue"

changeList

•  

  'the sky is blue'

• [1, 2, "the sky is blue", 3, 4, "shut the door"]
•  

  [1, 'the sky is blue', "buckle my shoe", 3, 4, 'shut the door']

•  

  TypeError:object does not support item assignment

Python provides the _________ function to create a list from a range or string.

• list

• append

• insert

•  

  [ ]

The __________ list method removes and returns the last item in a list.

• remove
• reverse

• count

• pop

In Python, strings are mutable collections of data in which individual items within the string are characters.

• true

• false

What is the output of the following code?

myList = [3, "cat", 6.5, 2]

myList

• 3

• 4

•  

  [3, 'cat', 6.5, 2]

•  

  An error message because a list cannot contain different types of data

If myList is a Python list, then this for loop "visits" each of the elements in the list, in order, from first to last: for x in myList:

• true

• false