POC Automation & Scripting 3

Question 1

Which Python module allows you to read and write `.env` files for environment variable management?

Accepted Answer

dotenv (python-dotenv)

Answer

`python-dotenv` loads variables from a `.env` file into `os.environ` using `load_dotenv()`.

Question 2

What does `os.walk(top)` yield when traversing a directory tree?

Accepted Answer

Tuples of (dirpath, dirnames, filenames) for each directory

Answer

`os.walk()` yields `(dirpath, dirnames, filenames)` tuples, where `dirnames` are subdirectory names and `filenames` are file names in that directory.

Question 3

In Selenium WebDriver automation, which method waits up to a maximum time for a condition to be true before throwing a TimeoutException?

Accepted Answer

WebDriverWait(driver, timeout).until(condition)

Answer

`WebDriverWait` polls the condition function every 500ms and raises `TimeoutException` if the condition isn't met within the timeout.

Question 4

Which `pathlib.Path` method creates a directory and all missing intermediate parents without error if the directory already exists?

Accepted Answer

Path.mkdir(parents=True, exist_ok=True)

Answer

`parents=True` creates intermediate directories and `exist_ok=True` suppresses the `FileExistsError` if the target already exists.

Question 5

When automating CSV processing, which Python module provides `DictReader` to iterate rows as dictionaries?

Accepted Answer

csv

Answer

`csv.DictReader` reads each row using the first row's headers as keys, returning `OrderedDict` objects per row.

(POC) Python Online Certification Practice Test