Python Quiz

471. What will this code output?

print(0.1 + 0.2 == 0.3)

True

False

Depends on Python version

Raises an Error

472. What is the result of this expression?

{1, 2, 3} & {2, 3, 4}

{2, 3}

{1, 4}

{1, 2, 3, 4}

None

473. What is the output of:

print(type((1)))

<class 'tuple'>

<class 'int'>

<class 'list'>

<class 'str'>

474. What does this expression return?

''.join(['a', 'b', 'c'])

'a b c'

'abc'

['a', 'b', 'c']

'a, b, c'

475. What is the output of:

print('abc' * 0)

''

'abc'

None

Error

476. What is the difference between `isinstance(obj, cls)` and `type(obj) == cls`?

`type()` supports inheritance, `isinstance()` does not

`isinstance()` supports inheritance, `type()` does not

They are functionally identical

`type()` is always preferred over `isinstance()`

477. What will this print?

print(all([]))

True

False

None

Error

478. What does `re.match()` return if no match is found?

None

False

0

Raises an Exception

479. What is the purpose of `__str__` in a class?

Controls string representation via str() or print()

Defines object equality

Creates an instance

Controls memory address of an object

480. What is the result of:

print([i for i in range(3) if i % 2])

[1]

[0, 2]

[0, 1, 2]

[2]