Advanced Collections — Series 3

Preview — 3 of 10 questions

What is the output of the following code?

javascript

from collections import Counter

c = Counter(b=1, a=3, z=0)
print(list(c.elements()))
print(sorted(c.elements()))

A['b', 'a', 'a', 'a'], ['a', 'a', 'a', 'b']

B['b', 'a', 'a', 'a', 'z'], ['a', 'a', 'a', 'b', 'z']

C['a', 'a', 'a', 'b'], ['a', 'a', 'a', 'b']

D['b', 'a', 'z'], ['a', 'b', 'z']

What is the output of the following code?

javascript

nums = {"a": 1, "b": 2, "c": 3, "d": 4}
evens = {k: v for k, v in nums.items() if v % 2 == 0}
print(evens)

squared_odds = {k: v * v for k, v in nums.items() if v % 2 != 0}
print(squared_odds)

A{2: 'b', 4: 'd'}, {1: 'a', 9: 'c'}

B{'b': 2, 'd': 4}, {'a': 1, 'c': 9}

C{'a': 1, 'c': 3}, {'b': 4, 'd': 16}

D{'b': 2, 'd': 4}, {'a': 1, 'c': 3}

What is the output of the following code?

javascript

lst = [1, 2, 3]
lst.extend("abc")
print(lst)

lst2 = [1, 2, 3]
lst2.append("abc")
print(lst2)

A[1, 2, 3, 'a', 'b', 'c'], [1, 2, 3, 'a', 'b', 'c']

BTypeError: 'str' object is not a list, [1, 2, 3, 'abc']

C[1, 2, 3, 'a', 'b', 'c'], [1, 2, 3, 'abc']

D[1, 2, 3, 'abc'], [1, 2, 3, 'abc']

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