Selenium Web Application Evaluation Strategies 3 — Questions and Answers
Question 1: Which strategy is best for evaluating a web application's behavior across multiple browsers using Selenium?
- Run tests sequentially on each browser installed locally
- Use Selenium Grid or a cloud provider like Sauce Labs to parallelize cross-browser testing (Correct answer)
- Copy and paste tests for each browser manually
- Rely on a single browser as a proxy for all others
Correct answer: Use Selenium Grid or a cloud provider like Sauce Labs to parallelize cross-browser testing
Selenium Grid and cloud providers enable parallel cross-browser execution, making comprehensive browser coverage practical and time-efficient.
Question 2: When evaluating page performance metrics with Selenium, how can you capture Navigation Timing API data?
- Read the browser console log via driver.manage().logs()
- Execute JavaScript with driver.executeScript() to access window.performance.timing (Correct answer)
- Use driver.getPageSource() and parse timing comments
- Enable verbose logging in ChromeOptions
Correct answer: Execute JavaScript with driver.executeScript() to access window.performance.timing
The Navigation Timing API is accessible via JavaScript, and driver.executeScript() retrieves the timing object from the browser's window context.
Question 3: To evaluate the correct rendering of responsive breakpoints in a web application, which Selenium technique is used?
- Use driver.manage().window().setSize() to simulate different viewport sizes (Correct answer)
- Change screen resolution in the OS settings before each test
- Use a separate mobile device for each breakpoint
- Inspect CSS media queries in the page source
Correct answer: Use driver.manage().window().setSize() to simulate different viewport sizes
Setting the browser window size via Selenium's window management API simulates different viewport widths for responsive layout evaluation.
Question 4: Which approach is most reliable for evaluating the state of a checkbox in a Selenium test?
- Check if the element's text equals 'checked'
- Use element.isSelected() to determine checked state (Correct answer)
- Attempt to click the checkbox and catch exceptions
- Read the element's background color
Correct answer: Use element.isSelected() to determine checked state
The isSelected() method directly returns the boolean checked state of checkboxes, radio buttons, and select options.
Question 5: When evaluating file upload functionality in a Selenium test on a web application, what is the correct approach?
- Use Robot class to interact with the OS file dialog
- Send the file path as text to the hidden file input element using sendKeys() (Correct answer)
- Use Actions class to drag and drop a file path
- Skip file upload tests as they cannot be automated
Correct answer: Send the file path as text to the hidden file input element using sendKeys()
Sending the local file path directly to the file input element using sendKeys() bypasses the OS dialog and works reliably across browsers.
Question 6: What strategy is most appropriate for evaluating the behavior of a web application's infinite scroll feature?
- Count the number of links on the page before and after scrolling
- Use JavascriptExecutor to scroll to the bottom and wait for new elements to load (Correct answer)
- Disable JavaScript and check all content is present in static HTML
- Use sendKeys(Keys.END) on the body element and immediately assert
Correct answer: Use JavascriptExecutor to scroll to the bottom and wait for new elements to load
Scrolling to the bottom via JavascriptExecutor triggers the lazy-load event, and subsequent WebDriverWait confirms new content has loaded.
Question 7: Which evaluation strategy verifies that a web application properly handles browser back-button navigation?
- Use driver.get() to reload the previous URL
- Use driver.navigate().back() and then assert the expected page state (Correct answer)
- Clear browser history via driver.manage().deleteAllCookies()
- Open a new browser tab to simulate back navigation
Correct answer: Use driver.navigate().back() and then assert the expected page state
driver.navigate().back() simulates the browser back button, allowing assertion of the expected URL and page state after navigation.
Selenium Web Application Evaluation Strategies 3
Which strategy is best for evaluating a web application's behavior across multiple browsers using Selenium?