PCAP Functions and Modules 2

Question 1

What is a closure in Python?

Accepted Answer

A function that captures variables from its enclosing scope

Answer

A closure is a function that remembers the variables from its enclosing scope even after that scope has exited.

Question 2

What does the `global` keyword do inside a function?

Accepted Answer

Declares that a variable refers to the global scope

Answer

`global` tells Python that the variable inside the function refers to the global namespace, not a local one.

Question 3

What is a decorator in Python?

Accepted Answer

A function that wraps another function to add behavior

Answer

A decorator is a callable that takes a function and returns a new function with added behavior.

Question 4

What does the `__name__ == '__main__'` guard do?

Accepted Answer

Prevents code from running when the module is imported

Answer

Code under `if __name__ == '__main__':` runs only when the script is executed directly, not when imported.

Question 5

What is a generator function in Python?

Accepted Answer

A function using `yield` to produce a sequence lazily

Answer

A generator function uses `yield` to produce values one at a time, suspending state between calls.

PCAP - Certified Associate in Python Programming Practice Test