Hackerrank Functions and Modularity 2

Question 1

What does the `*args` parameter in a Python function allow?

Accepted Answer

Passing a variable number of positional arguments

Answer

Passing a variable number of keyword arguments

Answer

Unpacking a dictionary into function arguments

Answer

Defining default argument values

Question 2

Which statement correctly imports only the `sqrt` function from the `math` module?

Accepted Answer

from math import sqrt

Answer

import math.sqrt

Answer

import sqrt from math

Answer

include math.sqrt

Question 3

What is the output of the following code?
```python
def f(x, y=10):
    return x + y
print(f(5))
```

Accepted Answer

15

Answer

Error

Answer

5

Answer

10

Question 4

What does `__name__ == '__main__'` check for in a Python module?

Accepted Answer

Whether the script is being run directly (not imported)

Answer

Whether the module has a main() function

Answer

Whether the module name is 'main'

Answer

Whether the Python interpreter is in interactive mode

Question 5

What is a closure in Python?

Accepted Answer

A nested function that captures variables from its enclosing scope

Answer

A function that closes open file handles automatically

Answer

A function with no return statement

Answer

A class method that restricts attribute access

Question 6

Which built-in function applies a function to every item in an iterable and returns a map object?

Accepted Answer

map()

Answer

apply()

Answer

filter()

Answer

reduce()

Question 7

What will this code output?
```python
def counter():
    count = 0
    def increment():
        nonlocal count
        count += 1
        return count
    return increment
c = counter()
print(c(), c())
```

Accepted Answer

1 2

Answer

0 1

Answer

1 1

Answer

Error