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MCQs for Python Dictionaries: Exam
practice.

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85

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Q41

What will be the output of the following Python code?

>>> a=dict()
>>> a[1]

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Q42

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

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

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Q43

What will be the output of the following Python code?

a={1:5,2:3,3:4}
print(a.pop(4,9))

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Q44

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

>>> import collections
>>> a=collections.Counter([3,3,4,5])
>>> b=collections.Counter([3,4,4,5,5,5])
>>> a&b

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Q45

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

d1 = {"john":40, "peter":45}
d2 = {"john":466, "peter":45}
d1 > d2

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Q46

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

>>>import collections
>>> b=collections.Counter([2,2,3,4,4,4])
>>> b.most_common(1)

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Q47

Suppose d = {"john":40, "peter":45}. To obtain the number of entries in dictionary which command do we use?

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Q48

The following Python code is invalid.

class demo(dict):
  def __test__(self,key):
    return []
a = demo()
a['test'] = 7
print(a)

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Q49

What will be the output of the following Python code?

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

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Q50

What will be the output of the following Python code?

>>> import collections
>>> a=dict()
>>> a=collections.defaultdict(str)
>>> a['A']

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Q51

What will be the output of the following Python code?

count={}
count[(1,2,4)] = 5
count[(4,2,1)] = 7
count[(1,2)] = 6
count[(4,2,1)] = 2
tot = 0
for i in count:
    tot=tot+count[i]
print(len(count)+tot)

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Q52

What will be the output of the following Python code?

a={1:"A",2:"B",3:"C"}
for i in a:
    print(i,end=" ")

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Q53

Which of these about a dictionary is false?

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Q54

What will be the output of the following Python code?

a={1:"A",2:"B",3:"C"}
b=a.copy()
b[2]="D"
print(a)

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Q55

What will be the output of the following Python code?

a={1:5,2:3,3:4}
a.pop(3)
print(a)

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Q56

What will be the output of the following Python code?

a={1:"A",2:"B",3:"C"}
b={4:"D",5:"E"}
a.update(b)
print(a)

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Q57

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

>>>import collections
>>> a=collections.Counter([1,1,2,3,3,4,4,4])
>>> a

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Q58

If b is a dictionary, what does any(b) do?

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Q59

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

>>> a={1:"A",2:"B",3:"C"}
>>> del a

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Q60

What will be the output of the following Python code?

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

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