Headless mode for CI in Selenium Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to run Chrome in headless mode.

Selenium Python

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

options = Options()
options.add_argument([1])
driver = webdriver.Chrome(options=options)
driver.get('https://example.com')
driver.quit()

Drag options to blanks, or click blank then click option'

A"--start-maximized"

B"--incognito"

C"--headless"

D"--disable-extensions"

Attempts:

3 left

💡 Hint

Common Mistakes

Using options that don't enable headless mode like incognito or maximized window.

Forgetting to add the argument to options.

Adding the --headless argument runs Chrome without opening a visible window, which is perfect for CI environments.

2fill in blank

medium

Complete the code to set up Firefox in headless mode.

Selenium Python

from selenium import webdriver
from selenium.webdriver.firefox.options import Options

options = Options()
options.[1] = True
driver = webdriver.Firefox(options=options)
driver.get('https://example.com')
driver.quit()

Drag options to blanks, or click blank then click option'

Aincognito

Bheadless

Cmaximize_window

Ddisable_extensions

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect property names like incognito or maximize_window.

Setting the property to a string instead of a boolean.

Setting options.headless = True runs Firefox without opening a window, suitable for CI.

3fill in blank

hard

Fix the error in the code to correctly run Chrome headless in CI.

Selenium Python

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

options = Options()
options.add_argument([1])
driver = webdriver.Chrome(options=options)
driver.get('https://example.com')
driver.quit()

Drag options to blanks, or click blank then click option'

A"--headless"

B"--disable-gpu"

C"--no-sandbox"

D"--window-size=1920,1080"

Attempts:

3 left

💡 Hint

Common Mistakes

Not passing the options object to the Chrome driver constructor.

Using other arguments that don't enable headless mode.

The code misses passing options=options to webdriver.Chrome(). Adding --headless alone is not enough without using the options object.

4fill in blank

hard

Fill both blanks to create a headless Chrome driver with window size set for CI.

Selenium Python

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

options = Options()
options.add_argument([1])
options.add_argument([2])
driver = webdriver.Chrome(options=options)
driver.get('https://example.com')
driver.quit()

Drag options to blanks, or click blank then click option'

A"--headless"

B"--disable-gpu"

C"--window-size=1920,1080"

D"--incognito"

Attempts:

3 left

💡 Hint

Common Mistakes

Using --disable-gpu instead of window size for layout.

Forgetting to add both arguments.

Use --headless to run without GUI and --window-size=1920,1080 to set a standard window size in headless mode for consistent layout.

5fill in blank

hard

Fill all three blanks to create a Firefox headless driver with custom user agent and window size for CI.

Selenium Python

from selenium import webdriver
from selenium.webdriver.firefox.options import Options
from selenium.webdriver.firefox.firefox_profile import FirefoxProfile

options = Options()
options.[1] = True
profile = FirefoxProfile()
profile.set_preference('general.useragent.override', [2])
driver = webdriver.Firefox(options=options, firefox_profile=profile)
driver.set_window_size([3], 1080)
driver.get('https://example.com')
driver.quit()

Drag options to blanks, or click blank then click option'

Aheadless

B"Mozilla/5.0 (CI Testing)"

C1920

D"--headless"

Attempts:

3 left

💡 Hint

Common Mistakes

Using string "--headless" instead of boolean True for headless property.

Passing user agent without quotes or as a variable.

Setting window size width as a string instead of integer.

Set options.headless = True to run Firefox headless, override the user agent string with a custom value, and set the window width to 1920 pixels for consistent CI testing.