Hackerrank Functions and Modularity 5

Question 1

What does `inspect.signature(func)` return?

Accepted Answer

A Signature object describing the function's parameters

Answer

`inspect.signature` returns a `Signature` object that contains information about a function's parameters and annotations.

Question 2

Which of the following correctly creates a package in Python?

Accepted Answer

A directory containing a file named `__init__.py`

Answer

A Python package is a directory that contains an `__init__.py` file, which marks it as a package to the interpreter.

Question 3

What is the output?
```python
def f(*args, **kwargs):
    return len(args), len(kwargs)
print(f(1, 2, x=3, y=4))
```

Accepted Answer

(2, 2)

Answer

Positional arguments 1 and 2 go into `args` (length 2), and keyword arguments x and y go into `kwargs` (length 2).

Question 4

What is the purpose of a decorator in Python?

Accepted Answer

To wrap a function and modify or extend its behavior

Answer

A decorator is a callable that takes a function and returns a modified version, allowing behavior to be added before or after the original function.

Question 5

Which keyword allows an inner function to reassign a variable defined in an enclosing (non-global) scope?

Accepted Answer

nonlocal

Answer

`nonlocal` explicitly declares that a variable belongs to the nearest enclosing scope, allowing reassignment inside inner functions.

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