Headless browser execution in Selenium Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is headless browser execution in Selenium?

Headless browser execution means running browser tests without opening a visible browser window. It runs in the background, making tests faster and suitable for servers without a display.

beginner

How do you enable headless mode in Selenium with Python?

You add the headless option to the browser driver. For example, for Chrome: <br>options = webdriver.ChromeOptions()<br>options.add_argument('--headless')<br>driver = webdriver.Chrome(options=options)

beginner

Name one advantage of using headless browser execution.

It speeds up test execution because it does not need to render the browser UI, saving system resources.

beginner

Can headless browser execution interact with web elements like a normal browser?

Yes, headless browsers behave like normal browsers and can interact with web elements, run JavaScript, and perform all user actions.

beginner

What is a common use case for headless browser execution?

Running automated tests on servers or continuous integration systems where no graphical interface is available.

What does headless browser execution mean?

A Running tests with a visible browser window

B Running tests only on mobile browsers

C Running tests without opening a visible browser window

D Running tests without internet connection

Headless execution means the browser runs without showing its window.

How do you enable headless mode in Selenium for Chrome using Python?

A options.add_argument('--headless')

B driver.headless = True

C driver.set_headless(True)

D options.enable_headless()

You add the '--headless' argument to ChromeOptions.

Which of these is NOT an advantage of headless browser execution?

A Shows browser UI for debugging

B Faster test execution

C Uses less system resources

D Runs on servers without display

Headless mode does not show the browser UI.

Can headless browsers run JavaScript on web pages?

A Only if enabled manually

B Yes, they run JavaScript like normal browsers

C No, they cannot run JavaScript

D Only on certain websites

Headless browsers fully support JavaScript execution.

Where is headless browser execution most commonly used?

A For mobile app testing

B Only on desktop computers

C For manual testing by users

D On servers and CI systems without graphical interface

Headless mode is ideal for automated tests on servers without displays.

Explain what headless browser execution is and why it is useful in automated testing.

Think about running tests without opening a browser window.

Describe how to set up headless mode in Selenium with Python for Chrome browser.

Focus on the options and arguments used.