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Cypresstesting~20 mins

Headless mode in Cypress - Practice Problems & Coding Challenges

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Challenge - 5 Problems
🎖️
Headless Mode Master
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Test your skills under time pressure!
❓ Predict Output
intermediate
2:00remaining
What is the output when running Cypress in headless mode?

Consider the following Cypress command run in a terminal:

npx cypress run --headless

What is the expected behavior of this command?

AOpens the browser UI and runs tests interactively.
BRuns tests only in Chrome browser with UI visible.
CRuns all tests without opening the browser UI and outputs results in the terminal.
DRuns tests but pauses after each test for manual confirmation.
Attempts:
2 left
💡 Hint

Headless mode means running tests without showing the browser window.

❓ assertion
intermediate
2:00remaining
Which assertion confirms tests ran in headless mode?

You want to verify your Cypress tests ran in headless mode by checking the environment. Which assertion correctly checks this?

Cypress
cy.task('getBrowser').then(browser => {
  // assertion here
})
Aexpect(browser.isHeadless).to.be.true
Bexpect(browser.isVisible).to.be.true
Cexpect(browser.name).to.equal('chrome')
Dexpect(browser.isHeadless).to.be.false
Attempts:
2 left
💡 Hint

Headless mode means the browser is running without a visible UI.

🔧 Debug
advanced
2:00remaining
Why does Cypress fail to run tests in headless mode?

You run npx cypress run --headless but tests fail with an error about missing display or browser. What is the most likely cause?

AThe machine lacks a graphical environment or virtual display for headless browser.
BThe test code contains syntax errors unrelated to headless mode.
CThe <code>--headless</code> flag is deprecated and ignored.
DThe tests require user interaction which is not supported in headless mode.
Attempts:
2 left
💡 Hint

Headless browsers still need some display environment on some systems.

❓ framework
advanced
2:00remaining
How to configure Cypress to run headless tests on CI with Chrome?

You want to run Cypress tests headlessly on a CI server using Chrome. Which configuration snippet in cypress.config.js correctly sets this up?

Ae2e: { browser: 'chrome', headless: true }
Be2e: { browser: 'chrome', headed: false }
Ce2e: { browser: 'chrome', headless: false }
De2e: { browser: 'chrome', headless: true, config: { video: false } }
Attempts:
2 left
💡 Hint

Headless mode is enabled by setting headless: true.

🧠 Conceptual
expert
2:00remaining
Why prefer headless mode in automated testing pipelines?

Which reason best explains why headless mode is preferred in automated testing pipelines?

AIt provides a full visual browser experience for debugging.
BIt runs tests faster and uses fewer resources by not rendering the UI.
CIt allows manual test interaction during execution.
DIt requires a graphical desktop environment to run.
Attempts:
2 left
💡 Hint

Think about speed and resource use in automation.