MCQs for Python Dictionaries: Exam-Style Practice

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

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

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

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

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

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

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

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