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Python Data Structures Week 4 Quiz Answers

Chapter Eight: Lists

Question 1) How are “collection” variables different from normal variables?

• Collection variables can only store a single value
• Collection variables pull multiple network documents together
• Collection variables merge streams of output into a single stream
• Collection variables can store multiple values in a single variable

Question 2) What are the Python keywords used to construct a loop to iterate through a list?

• for / in
• def / return
• foreach / in
• try / except

Question 3) For the following list, how would you print out ‘Sally’?

friends = [ 'Joseph', 'Glenn', 'Sally' ]

• print friends[3]
• print(friends[2:1])
• print(friends[2])
• print(friends[‘Sally’])

Question 4) What would the following Python code print out?

fruit = 'Banana'
fruit[0] = 'b'
print(fruit)

• banana
• b
• B
• [0]
• Banana
• Nothing would print – the program fails with a traceback error</span >

Question 5) Which of the following Python statements would print out the length of a list stored in the variable data?

• print(strlen(data))
• print(data.Len)
• print(length(data))
• print(data.length)
• print(len(data))
• print(data.length())

Question 6) What type of data is produced when you call the range() function?1x = list(range(5)).

• A string
• A list of integers
• A list of characters
• A boolean (true/false) value
• A list of words

Question 7) What does the following Python code print out?

a = [1, 2, 3]
b = [4, 5, 6]
c = a + b
print(len(c))

• [1, 2, 3]
• [4, 5, 6]
• [1, 2, 3, 4, 5, 6]
• 15
• 6
• 21

Question 8) Which of the following slicing operations will produce the list [12, 3]?

• t = [9, 41, 12, 3, 74, 15]
• t[1:3]
• t[2:2]
• t[2:4]
• t[:]
• t[12:3]

Question 9) What list method adds a new item to the end of an existing list?

• push()
• add()
• pop()
• index()
• forward()
• append()

Question 10) What will the following Python code print out?

friends = [ 'Joseph', 'Glenn', 'Sally' ]
friends.sort()
print(friends[0])

• Glenn
• Joseph
• friends
• Sally