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MCQs for Python Dictionaries: Exam
practice.

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Q61

What will be the output of the following Python code?

>>> a={i: i*i for i in range(6)}
>>> a

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Q62

What will be the output of the following Python code snippet?

a = {}
a[1] = 1
a['1'] = 2
a[1.0]=4
count = 0
for i in a:
    count += a[i]
print(count)

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Q63

Which of the following is not a declaration of the dictionary?

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Q64

What will be the output of the following Python code snippet?

d = {"john":40, "peter":45}
"john" in d

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Q65

What will be the output of the following Python code snippet?

total={}
def insert(items):
    if items in total:
        total[items] += 1
    else:
        total[items] = 1
insert('Apple')
insert('Ball')
insert('Apple')
print (len(total))

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Q66

If a is a dictionary with some key-value pairs, what does a.popitem() do?

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Q67

What will be the output of the following Python code snippet?

d = {"john":40, "peter":45}
d["john"]

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Q68

What will be the output of the following Python code snippet?

a={1:"A",2:"B",3:"C"}
print(a.get(5,4))

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Q69

What will be the output of the following Python code snippet?

a={1:"A",2:"B",3:"C"}
print(a.setdefault(3))

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Q70

Suppose d = {"john":40, "peter":45}, to delete the entry for "john" what command do we use?

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Q71

What will be the output of the following Python code snippet?

a = {}
a[1] = 1
a['1'] = 2
a[1]=a[1]+1
count = 0
for i in a:
    count += a[i]
print(count)

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Q72

What will be the output of the following Python code?

>>> import collections
>>> a=dict()
>>> a=collections.defaultdict(int)
>>> a[1]

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Q73

Suppose d = {"john":40, "peter":45}, what happens when we try to retrieve a value using the expression d["susan"]?

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Q74

What will be the output of the following Python code snippet?

a={}
a['a']=1
a['b']=[2,3,4]
print(a)

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Q75

What will be the output of the following Python code?

>>> a={'B':5,'A':9,'C':7}
>>> sorted(a)

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Q76

What will be the output of the following Python code?

>>> import collections
>>> b=dict()
>>> b=collections.defaultdict(lambda: 7)
>>> b[4]

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Q77

What will be the output of the following Python code?

>>> a={"a":1,"b":2,"c":3}
>>> b=dict(zip(a.values(),a.keys()))
>>> b

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Q78

Which of the following isn't true about dictionary keys?

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Q79

What will be the output of the following Python code?

>>> a={i: 'A' + str(i) for i in range(5)}
>>> a

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Q80

What will be the output of the following Python code?

>>> b={}
>>> all(b)

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