Python Collection Module

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    Question 1

    Which of the following is not a part of the collections module in Python?

    • Counter

    • OrderedDict

    • ArrayList

    • deque

    Question 2

    What is the output of the following code?


    from collections import

    Counterprint(Counter('gfg'))

    • Counter({'g': 1, 'f': 1})

    • Counter({'g': 2, 'f': 1})

    • Counter({'f': 2, 'g': 1})

    • {'g': 2, 'f': 1}

    Question 3

    What is the output of this code?

    Python 
    from collections import defaultdict
d = defaultdict(lambda: 'Not Present')
d['a'] = 10
print(d['a'], d['b'])



    • 10 KeyError

    • 10 Not Present

    • 10 None

    • KeyError Not Present

    Question 4

    Which collections class maintains the order in which keys are inserted?

    • OrderedDict

    • defaultdict

    • Counter

    • deque

    Question 5

    What will be the final order of keys in this code?

    Python 
    from collections import OrderedDict

od = OrderedDict()
od['a'] = 1
od['b'] = 2
od['c'] = 3

od.move_to_end('b')

print(list(od.keys()))

    • ['a', 'c', 'b']

    • ['b', 'a', 'c']

    • ['a', 'b', 'c']

    • ['c', 'b', 'a']

    Question 6

    Given this code, what will be the output?

    Python 
    from collections import namedtuple

Point = namedtuple('Point', ['x', 'y'])
p = Point(1, y=3)
print(p.x + p.y)

    • 4

    • 3

    • TypeError

    • SyntaxError

    Question 7

    Which collection type is best for implementing a stack or queue efficiently?

    • list

    • deque

    • set

    • tuple

    Question 8

    What will be the result of this code?

    Python 
    from collections import Counter
c = Counter(a=2, b=3)
d = Counter(a=1, b=2)
print(c - d)

    • Counter({'a': 1, 'b': 1, 'c': 0})

    • Counter({'a': -1, 'b': -1})

    • Counter()

    • Counter({'a': 1, 'b': 1})


    Question 9

    Which of the following features is unique to ChainMap?

    • It chains multiple dictionaries into a single view

    • It maintains the insertion order of keys

    • It counts frequency of elements

    • It provides default values for missing keys

    Question 10

    What will the following code print?

    Python 
    from collections import ChainMap

dict1 = {'a': 1, 'b': 2}
dict2 = {'b': 3, 'c': 4}
cm = ChainMap(dict1, dict2)
print(cm['b'])

    • 4

    • 3

    • 2

    • KeyError

    There are 10 questions to complete.

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