Top 20 Advanced Selenium Webdriver Coding Interview Questions of 2019

Question 1 - How to handle Alerts or Pop-Ups using Selenium Webdriver?

Answer - Alerts or javascript pop-ups can be handled by using commands of org.openqa.selenium.Alert class in Selenium Webdriver. 

Read details - Alert Handling

Question 2 - How to Handle Multiple Browser Tabs Using Selenium Webdriver?

Answer - Multiple browser tabs can be handled using Keys enumerator and switchTo() method. 

Read details - Multiple Browser Tabs Handling 

Question 3 - How to Achieve Code Reuseablity & Maintainablility in Selenium Code?

Answer - Code re-usability can be achieved by creating page methods (action methods) and use those methods in your test method code instead of direct selenium commands.

Read details - Code Re-usability in Selenium

Question 4 - How to Handle Dynamic Web Table in Selenium WebDriver?

Answer - We can handle dynamic web table by preparing dynamic xpath of table at runtime. 

Read details - Handle Dynamic Table

Question 5 - How to Extract Table Data/Read Table Data Using Selenium WebDriver?

Answer - We can extract table data by preparing dynamic xpath of table at runtime. 

Read details - Extract Table Data

Question 6 - How to Take Partial Screenshot in Selenium Webdriver?

Answer - Partial screenshot can be taken by using org.openqa.selenium.Point class of Selenium. We can get height and width of the element by using Point class. 

Read details - Take Partial Screenshot

Question 7 - How to take screenshot in Selenium Webdriver?

Answer - Screenshot can be taken by using org.openqa.selenium.TakesScreenshot class of Selenium.

Read details - Take Screenshot in Selenium

Question 8 - What is Actions class? What are its commands?

Answer - Actions class is used to handle Keyboard and Mouse Events. You need to import org.openqa.selenium.interactions.Actions in order to use Actions class.

Read details - Selenium Actions Class and It's Commands

Question 9 - How to upload a file in Selenium Webdriver?

Answer - Selenium can't directly interact with window dialogues but we can interact with them by keyboard interactions using Selenium's Keys class or Java's Robot class.

Read details - Upload File using Robot Class in Selenium

Question 10 - How to do Mouse hover in Selenium Webdriver?

Answer - Actions Class's Mouse Hover Command

Question 11 - What is TestNG? How it can be integrated with Selenium?

Answer - Selenium-TestNG Integration

Question 12 - How to create setup and teardown methods in TestNG?

Answer - Read - Selenium-TestNG Program Example

Question 13 - What is the difference b/w @BeforeClass, @BeforeMethod and @AfterClass, @AfterMethod in TestNG?

Answer - TestNG Annotations

Question 14 - How to set priority of test methods in TestNG?

Answer - Set Priority of Test Methods in TestNG

Question 15 - How to scroll vertically and horizontally using Selenium Webdriver?

Answer - Scroll can be done in selenium using org.openqa.selenium.JavascriptExecutor

Example - 

   // Create object of JavascriptExecutor
  JavascriptExecutor js = (JavascriptExecutor) driver;

  // Vertical Scroll
  js.executeScript("javascript:window.scrollBy(0,350)");

  // Horizontal Scroll
  js.executeScript("javascript:window.scrollBy(250,0)");

Question 16 - How to download file using Selenium Webdriver?

Answer - You can download a file using Robot class.

Example -

  /* Download file by clicking on Save button of window dialog

 */
 
 // Create object of Robot class
 Robot r = new Robot();  
 
 // Press Alt and S key, it will shift the focus to 'Save' button of Windows dialog
 r.keyPress(KeyEvent.VK_ALT);
 r.keyPress(KeyEvent.VK_S);
 
 // Now, release S and Alt key
 r.keyRelease(KeyEvent.VK_S);
 r.keyRelease(KeyEvent.VK_ALT);
 
 // Press Enter Key as Focus is on Save button, so it will be 
 r.keyPress(KeyEvent.VK_ENTER);
 
 // Release Enter key
 r.keyRelease(KeyEvent.VK_ENTER);

Question 17 - How to switch to Nth browser window in Selenium Webdriver?

Answer - Code example -

Case 1:

 // Create a Set and store all window handle ids in it
 Set AllWindowHandles = driver.getWindowHandles();
 String window1 = (String) AllWindowHandles.toArray()[0];
 String window2 = (String) AllWindowHandles.toArray()[1];

 // Switch to window with id 2
 driver.switchTo().window(window2);

Case 2 :

 /* Moving Between all Windows
  */
 for (String handle : driver.getWindowHandles()) {
  driver.switchTo().window(handle);
 }

Question  18 - How to handle ajax elements using Selenium Webdriver?

Answer - When we do Google search and a list of options matching to our keyword displayed on it's own without refreshing the page, is an example of ajax search. We can handle ajax elements using Explicit Wait in Selenium.

Read details - Automating Google Search using Explicit Wait

Question  19 - How to switch frames in Selenium Webdriver?

Answer - Code example -

  // Move to frame
 driver.switchTo().frame("Target Web element")

Question  20 - How to find broken links of a web page using Selenium Webdriver?

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