Selenium FAQs

  1. Q. What is automation and Advantages of automation
    A.The process of converting the manual test cases to test scripts by using any automation tool is known as Automation
    1. It saves time by executing the test cases with out manual effort
    2. CTC(Cost to the company) can be saved
    3. We can maintain Accuracy by repeating the same task in same manner
    4. Bugs can be identified
    5. We can report the bugs to the developer
    6. We can ensure for quality
  2. Q. What are the components available in Selenium
    A.Selenium contains 4 components
    1. Selenium IDE 2. Selenium RC 3. Selenium WebDriver 4. Selenium Grid
  3. Q. Why should we go for Selenium instead of QTP (or) How is Selenium different from commercial browser automation tools?
    A.1.Selenium is an opensource automation tool
    2. It supports multiple languages like Java,C#,Perl,python,Ruby,HTML and PHP
    3. It supports Firefox, IE, Google chrome, Safari and Opera
    4. Supports Windows, Linux and Mac
    5.Supports Web and mobile Applications
    6. Its very flexible and extendable
  4. Q. What is Selenium IDE
    A.1. IDE stands for integrated Development environment.
    2. It is for Record and Run the Scripts
    3. Selenium IDE is an add on for Firefox
    4. Its accountable for user actions
    5. Recorded script can be viewed in the supported languages like HTML, JAVA, C#, Ruby, Python
    6. Recorded script can be run against other browsers also by using Selenium RC or Webdriver
  5. Q. How to capture screen shot in web driver.
    A.We can capture screenshot by using below two lines:
    File scrFile = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
    FileUtils.copyFile(scrFile, new File(“D:\\screenshot.png”));
  6. Q. How to maximize the browser in web driver.

  7. Q. How to run selenium server from command prompt.
    A.1. Go to command prompt
    2. Give the path, Where the selenium server is saved ex: cd E:Library
    3. Use the command “java -jar selenium-server-standalone-2.42.2.jar”

  8. Q. What is Selenium RC
    A.RC stands for Remote Control. It is a server and it launches browsers. It acts as API and library. It controls the entire automation

  9. Q. How many test cases can be automated per day.
    A.It always depends on the application and test cases. But on and average we can automate 5 to 6 test cases per day. Ex: 1. For analyzing the test cases 2. Developing the script 3. Debugging and executing the script 4. Stabilizing the script

  10. Q. What challenges you have faced with Selenium.
    A.Challenge means problems or issues 1. Maintaining synchronization is a challenge in Selenium. 2. Handling Desktop, Flex, Flash elements is challenge with selenium. 3. Proving the user defined Results a challenge 4. Taking the data from the application is a challenge

  11. Q. How to handle SSL Certificate issue in Firefox with Webdriver (or) How do you handle the secured connection error in HTTPS?
    A.FirefoxProfile profile = new FirefoxProfile();
    driver=new FirefoxDriver(profile);

  12. Q. What is the latest version of Selenium available

  13. Q. How to handle SSL certication issue in IE
    A.Add the below command after opening the browser.

  14. Q. How to change the port number for Selenium RC
    A.Syntax:   -jar  seleniumJarfileName -port anyFourdigitNo
    Ex:  -jar selenium-server-standalone-2.33.0.jar -port 1234

  15. Q. How do you start Selenium RC from command prompt?
    A.1. Save the selenium jarfile (Selenium-server-standalone-2.34.0.jar) in any folder (Ex: D:/Library)
    2. Open command prompt
    3. Navigate to the path where you have saved the jar file and follow the below steps

    cd D:/Library
    java -jar selenium-server-standalone-2.34.0.jar

  16. Q. What locators available in Selenium RC
    CSS (Cascade style sheet)
    XPATH (Relative xpath and Absolute xpath)

  17. Q. What locators available in Selenium Webdriver
    Partial Link Text

  18. Q. How to create DefaultSelenium object and what parameters needs to be pass
    A.DefaultSelenium selenium= new DefaultSelenium(“localhost”,4444,”*firefox”,”http://”);
    localhost – It is the machine name and selenium server should be configured in the specific machine
    4444 – It’s selenium port number.
    *firefox – Its is the command to launch firefox
    http:// – Protocol to open URL

  19. Q. How many types of Xpaths are available
    A.Xpath is two types:

    1. Relative XPath
    2. Absolute XPath

  20. Q. • What is the difference between single and double slash in Xpath.
    A.“// ” is the starting point of the Xpath.
    “/” will navigate into the tag

    Ex:  //html/head/body/div1/div2/……


  21. Q. How to handle Alerts and Confirmation Alerts in WebDriver
    A.We have to navigate to Alert or Confirmation as below,


    To click OK or Cancel on Alert or Confirmation Alert then follow as below

    driver.switchTo().alert().accept();  — To click OK

    driver.switchTo().alert().dismiss(); — To click Cancel


  22. Q. How to Handle Popup in Webdriver
    A.We have to navigate to the popup as below

    driver.switchTo().window(“Window Name”);

    To navigate from Popup to main window

    driver.switchTo().window(“Main Window Name”);


  23. Q. How to handle dynamically changing popup in Webdriver
    A.Dynamic means the Name is not constant. It changes frequently

    Use the below approach to handle Dynamically changing popup

    Set<String> s=driver.getWindowHandles();
    Object popup[]=s.toArray();


  24. Q. Is it possible to handle multiple popups in Webdriver
    We can handle it by using the command



  25. Q. How to capture window name


  26. Q. How to launch Firefox, Safari and Opera with Webdriver
    A.Firefox, Safari and Opera we be launch by using below commands.

    WebDriver driver=new FirefoxDriver();

    WebDriver  driver=new OperaDriver();

    WebDriver  driver=new SafariDriver();

  27. Q. How to launch InternetExplorer.
    A.For IE, we need the supported “Internet Explorer Driver Server”. It can be downloaded from the below site:

    Below code is to launch IE.

    System.setProperty(“”, “E:\\Library\\IEDriverServer.exe”);
    driver=new InternetExplorerDriver();


  28. Q. How to launch GoogleChrome
    A.For GoogleChrome, We need the supported “ChromeDriver” exe file. Can be downloaded from the below site:

    Below code is to launch GoogleChrome

    System.setProperty(“”, “E:\\Library\\chromedriver.exe”);
    driver=new ChromeDriver();


  29. Q. Brief about the Disadvantages of Selenium
    A.Selenium supports Web applications. It doesn’t support Desktop applications 

  30. Q. How to handle Deskptop, Flex and Flash objects in Selenium.
    A.We can use SIKULI as a add-on for Selenium to support Desktop, Flex and Flash objects

    Sikuli is an open source automation tool developed on JAVA

    Can be downloaded from:


  31. Q. How to take data from excel(xls) file
    A.FileInputStream fi=new FileInputStream(“Path of the excel file”);

    Workbook w=Workbook.getWorkbook(fi);

    Sheet s=w.getSheet(0);

    It will read the excel file upto the sheet. To take the data from sheet, use below command,

    s.getCell(columnID, rowID).getContents())

    ex: s.getCell(0, 1).getContents();


  32. Q. How to create Excel file
    A.FileOutputStream fo=new FileOutputStream(“Path to create xls file”);

    WritableWorkbook wb=Workbook.createWorkbook(fo);

    WritableSheet ws=wb.createSheet(“Results”, 0);

    Label un=new Label(0,0,”Username”);




  33. Q. How to print data from notepad(txt file)
    A.File f=new File(“E:\\data2.txt”);

    FileReader fr=new FileReader(f);

    BufferedReader br=new BufferedReader(fr);

    String str;






  34. Q. How to create and write data into txt file
    A.  File f=new File(“E:\\data2.txt”);
    FileWriter fw=new FileWriter(f);
    BufferedWriter bw=new BufferedWriter(fw);

  35. Q. How to take or print data from XML file
    A.File fXmlFile = new File(“D://file.xml”);
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document doc = dBuilder.parse(fXmlFile);
    System.out.println(“Root element :” + doc.getDocumentElement().getNodeName());
    NodeList nList = doc.getElementsByTagName(“staff”);
    for (int temp = 0; temp < nList.getLength(); temp++) {
    Node nNode = nList.item(temp);
    System.out.println(“\nCurrent Element :” + nNode.getNodeName());
    if (nNode.getNodeType() == Node.ELEMENT_NODE) {
    Element eElement = (Element) nNode;
    System.out.println(“Staff id : ” + eElement.getAttribute(“id”));
    System.out.println(“First Name : ” + eElement.getElementsByTagName(“firstname”).item(0).getTextContent());
    System.out.println(“Last Name : ” + eElement.getElementsByTagName(“lastname”).item(0).getTextContent());
    System.out.println(“Nick Name : ” + eElement.getElementsByTagName(“nickname”).item(0).getTextContent());
    System.out.println(“Salary : ” + eElement.getElementsByTagName(“salary”).item(0).getTextContent());


  36. Q. What is Ant or Apache Ant
    A.Ant is a Java based build management tool.
    The process of converting the source code to software system (executable code) is known as build.
    There are number of steps to convert the source code to executable code. Ant will manages all the steps with Build.xml file.

    Steps to convert the Source code to software:
    1. Taking the source code from src repository
    2. Preparing a build area
    3. Compiling the source code
    4. Build the compiled code to executable code


  37. Q. What is Maven
    A.Maven is also Java based build management tool. It is the advanced version of Ant.


  38. Q. What is the differences between Ant and Maven
    A.1. Maven is widely preferred than Ant. Ant is an older tool.
    2. Ant doesn’t come with formal conventions such as a common project directory. Maven consists of conventions.
    3. Ant is procedural, Maven is declarative. It means in Ant, you have to specify the order what should have to be done, where as Maven takes care of all the directories once the files are stored in the pom.xml file.
    4. Another difference that can be seen is that Ant does not have a life cycle whereas Maven has a life cycle.
    5. The scripts in Ant are not reusable where as Maven comes with reusable plugins.


  39. Q. What are the disadvantages of using Selenium as testing tool
    A.It doesn’t support desktop or windows based applications.
    But we can overcome by using the tool SIKULI


  40. Q. How do you handle Ajax controls using selenium? i. Eg. By typing in search engine how do you capture the auto suggestion
    A.Ajax control means when we enter some text in the google text box, it display the auto suggested values. That text box is an ajax control.
    Type the value in the textbox and capture all the suggested values in a string.
    Split the string and take the values


  41. Q. How do you select the 2nd item in a List box or drop down. Select(driver.findElement(“id”))).selectByIndex(index);


  42. Q. Brief about your framework
    A.Its Hybrid framework where its a combination of Keyword driven (TestNG) and DataDriven framework.
    Advantage of Hybrid framework is, we can utilize the advantages of both Keyword driven and Datadriven frameworks


  43. Q. What is the difference between assert and Verify Commands?
    A.Verify command will not stop execution of test case if verification fails. It will log an error and proceed with execution of rest of the test case.
    Assert command will stop execution of test case if verification fails. It will log an error and will not proceed with execution of rest of the test case


  44. Q. Explain about your reporting method
    A.Bug Reporting is always a manual process. Getting the test report from the automation tool and analyze the report for bugs. If identified, report the bugs by using QC or Bugzilla or JIRA


  45. Q. What is the difference between Selenium RC and Webdriver
    A.1. We can access all the latest browsers
    2. Not necessary to start Selenium server to run the webdriver programs
    3. Webdriver by default maintains page load synchronization, for page refresh we need to handle it
    4. Its having auto scroll down action into the application while executing the script
    5. We can develop both webdriver commands and RC in a single class
    6. We can effectively take the information from application


  46. Q. What are all things can not be done through selenium IDE
    A.We can’t perform below testings
    1. Regression testing
    2. Retesting
    3. Static Testings like GUI and Validations
    4. DB Testing
    5. It doesn’t provide Test Report


  47. Q. Brief about Selenium Grid.
    A.It is for parallel execution. We can launch all the browsers parallelly and the scripts can be executed on it parallelly


  48. Q. How to use selenium for performance testing
    A.Selenium is functional testing automation tool. Its not for performance testing. We can generate only the load by using Selenium.


  49. Q. How to get all the links in
    A.Link means anchor tag in any application.
    Identify all the links by using FindElements and tagname.
    Get all the links to List variable and take the targetted link by using for loop and if condition


  50. Q. Is it possible to handle multiple popups in selenium?
    A.Yes we can handle it with the command getWindowHandles().
    Take all the window names into Set<String> variable and convert it to array.
    Use the array index to navigate to specific window by using driver.switchTo().window(ArrayIndex);


  51. Q. Difference between Junit and TestNg framework
    A.JUnit Vs TestNG

    1. We need to implement all the test methods very independently in Junit. Not necessary in TestNg
    2. JUnit contains very limited annotations like @Beforeclass, @Before, @Test, @After and @AfterClass. TestNG  contains multiple annotations like @BeforeSuite, @BeforeTest, @Beforeclass, @BeforeMethod, @Test, @AfterMethod @AfterClass, @AfterTestand @AfterSuite
    3. TestNG provides html result file by default where as in JUnit it wont provide html result file by default


  52. Q. If the default port of selenium is busy then which port you use?
    A.Selenium by default uses 4444 port no. If the port is already used by any other server then we can change it to any other 4 digit no.
    Ex: 5555 or 1234 or 6666


  53. Q. How much time we can save with automation
    A.It always depends on the project and test cases. But on and average we can save around 50% to 60% of the time.


  54. Q. What is automation Lifecycle or Automation approach or automation plan
    A.1. Do the POC for the project
    2. Execute or review all the manual test cases to get the functional knowledge of the project and to identify the test cases for automation
    3. Develop the framework
    4. Prepare the test scripts for all the identified test cases
    5. Integrate the scripts with Framework for execution
    6. Before executing identify the build changes, if available update the scripts
    7. Execute the scripts and capture all the results in seperate folder
    8. Analyze the test report and identify the bugs
    9. Report the bugs manually to the developer by using some reporting tool


  55. Q. Write a program to get all the text boxes in register page with webdriver
    A.  List<WebElement> str=driver.findElements(By.tagName(“textbox tagname”));

    for (int i = 0; i < str.size(); i++) {
    System.out.println(str.get(i).getAttribute(“id”)); //To prnt ids


  56. Q. How to execute scripts on other machines Remotely
    A.URL url = new URL( “http”, “localhost”, 4444, “/wd/hub” );
    DesiredCapabilities capabilities =DesiredCapabilities.internetExplorer(); capabilities.setJavascriptEnabled(true); WebDriver driver = new RemoteWebDriver(url,capabilities); driver.get(“”);

    Note: Provide IP address of other machines instead of localhost


  57. Q. How to Mouse over on one element by using webdriver
    A.      WebDriver driver=new FirefoxDriver();
    Actions a=new Actions(driver);
    WebElement str=driver.findElement(By.linkText(“About Us”));


  58. Q. How to Scroll down and Scroll up in the browser
    A.      WebDriver driver=new FirefoxDriver();
    Actions a=new Actions(driver);