Hackerrank Functions and Modularity 3

Question 1

What does the `**kwargs` parameter collect inside a function?

Accepted Answer

Extra keyword arguments as a dictionary

Answer

Extra positional arguments as a list

Answer

All arguments as a set

Answer

Only named parameters with default values

Question 2

Which decorator marks a function to be called with no arguments and caches its result after the first call?

Accepted Answer

@functools.lru_cache

Answer

@staticmethod

Answer

@classmethod

Answer

@property

Question 3

What is the correct way to define a function that accepts positional-only arguments in Python 3.8+?

Accepted Answer

Use `/` after the positional-only parameters

Answer

Use `*` before the parameters

Answer

Prefix parameter names with `_`

Answer

Use `@positional` decorator

Question 4

What happens when you call `dir()` on a module?

Accepted Answer

It returns a list of names defined in the module

Answer

It lists the files in the module's directory

Answer

It prints the module's docstring

Answer

It removes unused imports from the module

Question 5

What does the `functools.partial` function do?

Accepted Answer

Creates a new function with some arguments pre-filled

Answer

Returns only part of a function's return value

Answer

Splits a function into multiple smaller functions

Answer

Partially evaluates a function for type checking

Question 6

What is the result of the following expression?
```python
list(filter(lambda x: x % 2 == 0, [1, 2, 3, 4, 5]))
```

Accepted Answer

[2, 4]

Answer

[1, 3, 5]

Answer

[True, False, True, False, True]

Answer

[False, True, False, True, False]

Question 7

In Python, what is the purpose of `__all__` in a module?

Accepted Answer

It controls which names are exported when `from module import *` is used

Answer

It lists all installed packages

Answer

It defines all global variables in the module

Answer

It automatically imports all submodules