Quiz on Python Defaultdict

What is the main advantage of defaultdict over a regular dictionary?

Which module provides defaultdict?

What must you pass when creating a defaultdict?

What is the output of:

from collections import defaultdict
d = defaultdict(int)
print(d[‘a’])

Which of the following can be used as a default factory?

What is the result of:

d = defaultdict(list)
d[‘x’].append(10)
print(d[‘x’])

Which statement is true about `defaultdict`?

What happens if no default factory is passed?

What is the output?

d = defaultdict(str)
print(d[‘a’] + ‘hello’)

Which is best use case of `defaultdict(list)`?

What does `d = defaultdict(lambda: 999)` do?

Can you convert a regular dictionary to a `defaultdict`?

Is `defaultdict` a subclass of dict?

Which method removes a key in `defaultdict`?

What is the behavior of:

d = defaultdict(list)
d[‘x’] += [5]
print(d)