Selenium WebDriver Case Studies & Practical Application 2

Question 1

A QA team needs to test a single-page application where the URL doesn't change on navigation. Which Selenium strategy best handles verifying page transitions?

Accepted Answer

Check document.title via JavaScript executor after each action

Answer

In SPAs the URL rarely changes, so checking document.title (or a unique DOM element) via JavascriptExecutor is the most reliable signal of a page transition.

Question 2

After deploying a new build, automated tests start failing with StaleElementReferenceException on previously stable locators. What is the most likely root cause?

Accepted Answer

The DOM is re-rendered after an AJAX call before the element is interacted with

Answer

StaleElementReferenceException typically means the DOM was updated (e.g., via AJAX re-render) after the element reference was captured, making it stale.

Question 3

A test suite runs fine locally but intermittently fails on CI with 'element not interactable'. The CI machine is slower. What is the best fix?

Accepted Answer

Replace implicit waits with explicit WebDriverWait for specific conditions

Answer

Explicit WebDriverWait polls for a specific condition (e.g., elementToBeClickable), making tests resilient to environment speed differences without arbitrary sleeps.

Question 4

Your team tests a file-upload feature that opens a native OS dialog. How should Selenium handle this scenario?

Accepted Answer

Send the file path directly to the hidden input element using sendKeys()

Answer

Selenium can call sendKeys() with a local file path on an <input type='file'> element, bypassing the native dialog entirely.

Question 5

A login test must read credentials from environment variables to avoid storing secrets in code. Which approach is correct in a Java Selenium test?

Accepted Answer

System.getenv("USERNAME") and System.getenv("PASSWORD")

Answer

System.getenv() reads OS-level environment variables at runtime, keeping credentials out of source code.

Selenium WebDriver Practice Test

Selenium WebDriver Practice Test

Selenium WebDriver Case Studies & Practical Application 2