Top 20 Advanced Selenium Webdriver Coding Interview Questions of 2019

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


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.





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.


    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.


    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.


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






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



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



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



    Question 14 - How to 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.
    


    

    

    

    

    
 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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    Top 10 Demo Websites to Practice Selenium Webdriver Online
    

    

    

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In this post you will find links of top demo websites/pages which Automation Professionals can use for practice purpose. Here is the list of demo websites: 
    1. AUTOMATION PRACTICE FORM Level - BeginnerAbout - This form contains all the important form elements which we come across daily like text box, radio button, check box, select drop downs, multi-select box, button, links, File Upload, Download link.

     
    2. AUTOMATION PRACTICE TABLE Level - IntermediateAbout - This web page contains table data. You can test your Selenium and Java skills. It would require Selenium commands and java loops, conditions to read table data.  

    3. PRACTICE WINDOWS & ALERTS Level - IntermediateAbout - This web page contains buttons/ links which produces new web windows, javascript alerts etc. You can practice selenium commands to handle windows/alerts on this page. 
     
     4. E-Commerce Practice Website Level - Intermediate/ProAbout - It’s a full featured e-commerce website simulator and my favorite. Here you can test anythi…

    


    

    

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    How To Handle Dynamic Xpaths (Web Table) in  Selenium WebDriver
    

    

    

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In this selenium webdriver post, we will learn how to handle dynamic web table. There might occur some scenarios where every time a page loads with different number of rows and columns or different columns for each row.

    
For that, we have to put two for loops,
    
1. first loop will iterate all the rows and
    
2. second loop inside it will iterate the columns of each row


    publicclassDynamicTable{

  WebDriver driver =new FirefoxDriver();@BeforeTestpublicvoidsetup()throws Exception {
  driver.manage().window().maximize();

 
 driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);

  driver.get("https://www.techlistic.com/p/demo-selenium-practice.html");}@AfterTestpublicvoidtearDown()throws Exception {
  driver.quit();}@Testpublicvoidtest_Dynamic_Webtable(){// Locate table
  WebElement mytable = driver.findElement(By.xpath(".//*[@id='post']/div[1]/table/tbody"));// Locate rows of table and save locators of each row in a list
  List rows_table = mytable.findEl…

    


    

    

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    How to Take Screenshot and Partial Screenshot in Selenium WebDriver
    

    

    

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In this tutorial we will learn to take full screenshot and partial screenshot. In automation we capture the screenshots for reference. To capture screenshot in Selenium 'TakeScreenshot' interface is used.

     


    Take Screenshot Command: 
     /************************************ * Capture Screenshot               * ************************************  *//* Create object of File class of Java  * And capture screenshot using getScreenshotAs() method of Webdriver * Set Output type of screenshot taken as 'File'*/File screenshot = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);

/* Use FileUtils class of Java  * Call it's copyFile method * Copy screenshot file to a location with some name and extension you want*/FileUtils.copyFile(screenshot,new File("D:\\screenshot.jpg")); 



    How to Take Partial Screenshot:

    
Sometimes we don't want to take screenshot of the full screen. Reasons might be, full size images would last in huge memory storage for image directory or…

    


    

    

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    Selenium WebDriver - Browser and Navigation Commands
    

    

    

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Browser commands are the starting point of your Selenium Webdriver script. These commands used to launch browser, maximize it, open URL to be tested and other navigation commands.
    1. Browser Commands i. Set Path of browser/driver executable:
     This would be the first line of your webdriver script. You have to download the browser executable file for the browser you are using and set path of the driver executbale to system property.Like for firefox you have to download geckodriver.exe and place in your project. Similarly for other browsers you have to download their browser/driver executables.Download Driver Executables link - https://www.seleniumhq.org/download/Below is an example for Firefox.


    // Set Path of driver executable
String driver_executable_path = "./src/com/techlistic/utils/geckodriver.exe";

System.setProperty("webdriver.gecko.driver", driver_executable_path); 
     
     ii. Launch Broswer: // Launch Browser - Creating a Firefox instance
WebDriver driver = new FirefoxDri…

    


    

    

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    Automation Framework Building 1st step - Implementing Code Re-usablility
    

    

    

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In this post, you will learn kind of coding pattern which is very helpful in maintaining our automation code. This post is written insight to help beginners. We'll learn that instead of writing a linear script, we should create page (action) methods which in general contain actions which we are going to perform on our web software. 

    Let's say, we have a login functionality in our software and we have to automate it. In that case we'll create a method named login and write the commands like, entering username, password and click login in that method. Now we can use that method wherever we need it in other test cases as well. Benefits of using action methods are:

    Code Re-usabilityBetter maintainability of codeSharing below a sample script, in which I'm entering data in a web form using action methods:


     

     
    You can also place these action methods in some other class like Common.java. And if you want to re-use any of the methods in your Selenium script, just create the object Comm…

    


    

    

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