Selenium Scenario Based Interview Questions
Suggested Interview Questions for Selenium Scenarios
Selenium Scenario Based Interview Questions
Selenium Scenario Based Interview Questions are questions that are designed to assess a candidate's knowledge and understanding of how to handle different scenarios while using Selenium, an automated testing tool. These questions require candidates to think critically and provide practical solutions to real-world problems that may arise during the testing process. They also help interviewers evaluate a candidate's problem-solving skills, ability to think on their feet, and overall understanding of the software. These questions are commonly asked in interviews for software testing roles and can help determine if a candidate is well-versed in Selenium and can handle various testing scenarios effectively.
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1 - Can you explain the difference between WebElement and WebDriver?
WebElement is an interface that provides methods to interact with elements on a webpage. It represents a single element on a page, such as a button, textbox, or checkbox. On the other hand, WebDriver is an interface that provides methods to automate the browser itself, such as opening a URL, clicking on links, and navigating through different pages. In simple terms, WebElement deals with individual elements, while WebDriver deals with the entire webpage.
2) How do you handle dynamic elements in Selenium?
Dynamic elements are those that change their properties like ID, class, or name dynamically every time the webpage is loaded. To handle such elements in Selenium, we can use techniques like CSS selectors, XPath, or regular expressions to locate the element based on its attributes. Another approach is to use the findElement() method with a specific timeout to wait for the element to become visible and then perform the desired action.
3) What are the advantages of using Page Object Model (POM) in Selenium?
POM is a design pattern used to create an object repository for web elements on a webpage. It helps in reducing code duplication, improving code maintenance, and making test scripts more readable and understandable. Additionally, it also promotes reusability, as the same page can be used for multiple tests, making the test scripts more robust and scalable.
4) How do you handle pop up windows in Selenium?
To handle pop up windows in Selenium, we can use the getWindowHandles() method to get a list of all the currently open browser windows. Then, we can use the switchTo() method to switch control to the desired window and perform actions on it. We can also use the Alert class in Selenium to handle JavaScript alert pop ups on a webpage.
5) What are the different types of waits in Selenium?
There are three types of waits in Selenium Implicit, Explicit, and Fluent. Implicit wait instructs the browser to wait a specified amount of time before throwing an exception when trying to find an element. Explicit wait can be used to specify a condition that the driver should wait for before proceeding to the next step. Fluent wait is a slightly advanced version of explicit wait, where we can define custom polling intervals and exceptions to be ignored.
6) How do you handle SSL certificate errors in Selenium?
To handle SSL certificate errors, we can use the capability of the browser to accept untrusted certificates. We can do this by setting the acceptSslCerts capability to ‘true’ in the desired capabilities of the browser. We can also use tools like BrowserMob Proxy or Fiddler to ignore SSL certificate errors.
7) How do you identify broken links using Selenium?
To identify broken links on a webpage, we can use the findElements() method to get all the links on the page and then loop through each link to send a HTTP request using HttpURLConnection class. If the response code is 200, the link is valid, and if it is 404, the link is broken.
8) What is the difference between modal and non modal dialog boxes in Selenium?
Modal dialog boxes are those that require the user to interact with them before moving on to the next step, while non modal dialog boxes do not block the user's interaction with other elements on the webpage. Examples of modal dialog boxes include JavaScript alerts, while non modal dialog boxes include drop down menus or tooltips.
9) What are the advantages of using TestNG with Selenium?
TestNG (Test Next Generation) is a testing framework that provides features like test execution, grouping, sequencing, and parallel execution of tests. It also has in built reporting capabilities, making it easy to analyze test results. Using TestNG with Selenium can help in creating a structured testing framework, simplifying test management and execution.
10) Can you explain the difference between findElement() and findElements() methods in Selenium?
The findElement() method returns a single WebElement that matches the specified locator, while the findElements() method returns a list of WebElements that match the locator. So, if there is only one matching element on the webpage, findElement() will return that element, while findElements() will return a list containing that element.
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