Python Dictionaries
Authored by Sangameshwar Biradar
Computers
University
Used 910+ times
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10 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of the following are true of Python dictionaries:
Dictionaries can be nested to any depth.
Dictionaries are accessed by key.
All the keys in a dictionary must be of the same type.
Dictionaries are mutable.
A dictionary can contain any object type except another dictionary.
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
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) }
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Consider this dictionary:
d = {'foo': 100, 'bar': 200, 'baz': 300}
What is the result of this statement:
d['bar':'baz']
It raises an exception
(200, 300)
200 300
[200, 300]
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Suppose x is defined as follows:
x = [
'a',
'b',
{
'foo': 1,
'bar':
{
'x' : 10,
'y' : 20,
'z' : 30
},
'baz': 3
},
'c',
'd'
]
What is the expression involving x that accesses the value 30?
x[2]["bar"]["z"]
x[2]["bar"]
x["bar"]["z"]
x[2]["bar"]["z"][3]
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of the following could be a valid dictionary key:
(3+2j)
('foo', 'bar')
dict(foo=1, bar=2)
'foo'
['foo', 'bar']
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
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
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Suppose you have a dictionary d1. Which of the following effectively creates a variable d2 which contains a copy of d1:
d2 = dict(d1.items())
d2 = dict(d1.keys())
d2 = {}
d2.update(d1)
d2 = dict(d1.values())
d2 = dict(d1)
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