Selenium: practice, test and prove it

Covers WebDriver basics, locators, waits, frames, alerts and windows, Page Object Model and common exceptions.

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Start the selenium test Read the first lesson

Selenium screenings mostly check whether you can write stable tests, not whether you remember every method. Expect questions on choosing a locator, fixing a test that fails only sometimes, switching into a frame or a new window, and reading exceptions such as NoSuchElementException and StaleElementReferenceException.

Code on this page uses Java syntax because it is common in screenings, and the same ideas apply in Python, C# and JavaScript bindings. The lessons cover locators and waits first, then frames, windows and the Page Object Model.

Benchmark: The pass mark on this site is 80%, and Selenium is commonly screened for automation tester, SDET and QA engineer roles. Requirements vary by employer.

Lessons

Choosing locators and waits that keep tests stableHow to pick reliable locators with id, CSS and XPath, and how to replace sleeps with explicit waits to stop flaky tests.Lesson 1

Frames, alerts, windows, exceptions and the Page Object ModelHow to switch context into frames, alerts and new tabs, what common exceptions mean, and how page objects keep tests maintainable.Lesson 2

Interacting with forms, dropdowns, keyboard and mouse actionsFill inputs, pick options with Select, handle checkboxes and radio buttons, and use ActionChains for hover, drag and keyboard shortcuts.Lesson 3

Structuring tests with pytest: fixtures, assertions, screenshots and headless runsSet up and tear down the browser with fixtures, write assertions that explain failures, save screenshots on failure and run headless in CI.Lesson 4

Interview prep

Selenium interview questionsSelenium questions interviewers commonly ask automation candidates, with answers that reflect real test maintenance.6 questions

Certificate

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Common questions

Do I need to know Java to pass Selenium screenings?

You need one language well. Many screenings use Java, but Python is also common, and the WebDriver concepts are the same in each.

Which Selenium version do these questions assume?

They assume current WebDriver-based Selenium and avoid details that changed between versions. Older Selenium RC is not covered.

Is Selenium enough for an automation role?

Usually not on its own. Employers commonly also look for a test framework, version control, basic CI understanding and API testing.

Selenium test for interviewWhat the screening round looks like, with a 5-question sample.