Post Test Quiz PPL 01-13102023

Which of the following is not a valid way to define this dictionary in Python:

• d = dict([

  ('foo', 100),

  ('bar', 200),

  ('baz', 300)

  ])

• d = {}

  d['foo'] = 100

  d['bar'] = 200

  d['baz'] = 300

• d = dict(foo=100, bar=200, baz=300)

• d = {'foo': 100, 'bar': 200, 'baz': 300}

• d = { ('foo', 100), ('bar', 200), ('baz', 300) }

You have the following dictionary definition:

d = {'foo': 100, 'bar': 200, 'baz': 300}

What method call will delete the entry whose value is 200?

• delete d('bar')

• d.pop("bar")

• d.remove("bar")

• None of the above

What would be the output of the following code snippet?

a_dict = {'color': 'blue', 'fruit': 'apple', 'pet': 'dog'}

for key in a_dict:

print(key)

• 'blue'

  'apple'

  'dog'

• color

  fruit

  pet

• blue

  apple

  dog

• 'color'

  'fruit'

  'pet'

Consider the following statement:

If you just need to work with the keys of a dictionary, then you can use .keys(), which is a method that returns a new view object containing the dictionary’s keys.

Is this statement True or False?

• False

• True

What is the output of the program above

• e

• y

• t

• g

The output of the code above is

• [101, 102, 103, 104]

• [3.6, 3.7, 3.8, 4]

What is the output of the code above

• [3.6, 3.7, 3.8, 4]

• [101, 102, 103, 104]

Square brackets in an assignment statement will create which type of data structure?

( s=[] )

• List

• Queue

• Dictionary

• Set

What will be the output of the following Python code?

nums = set([1,1,2,3,3,3,4,4])

print(len(nums))

• 7

• Error, invalid syntax for formation of set

• 4

• 8

What will be the output of the following Python code?

s=set()

type(s)

• <’set’>

• <class ‘set’>

• set

• class set