Selenium Debugging & Performance Optimization 3

Question 1

What is the purpose of using 'driver.manage().timeouts().pageLoadTimeout()' in Selenium?

Accepted Answer

Sets maximum time to wait for a page to fully load before throwing an exception

Answer

pageLoadTimeout() defines how long WebDriver waits for a page load to complete before throwing a TimeoutException.

Question 2

When a Selenium test fails with 'ElementNotInteractableException', what is the most effective debugging step?

Accepted Answer

Check if the element is hidden, overlapped, or disabled using browser DevTools

Answer

ElementNotInteractableException means the element exists in the DOM but cannot be interacted with, typically because it is hidden, covered, or disabled.

Question 3

Which technique helps debug WebDriver commands by logging each command and its response during test execution?

Accepted Answer

Enabling verbose logging via system properties or ChromeOptions arguments

Answer

Setting verbose logging via ChromeOptions or system properties like webdriver.chrome.verboseLogging outputs each WebDriver command and response for debugging.

Question 4

What is the most efficient way to handle a dynamically loaded table with thousands of rows in Selenium without degrading performance?

Accepted Answer

Locate rows using increasingly specific CSS selectors scoped to the table

Answer

Scoping CSS selectors to the specific table container limits the DOM search space, reducing processing time for large datasets.

Question 5

How does enabling browser caching in Selenium tests affect performance test accuracy?

Accepted Answer

It can mask real load times by serving cached assets instead of network requests

Answer

Cached assets skip network requests, making pages load faster than real first-visit scenarios and potentially producing misleading performance metrics.

(Selenium) Selenium Testing Certification Practice Test

(Selenium) Selenium Testing Certification Practice Test

Selenium Debugging & Performance Optimization 3