Selenium Pom Interview Questions
Suggestions for preparing for a Selenium Pom Interview
Selenium Pom Interview Questions
Selenium Pom (Page Object Model) interview questions are related to the popular design pattern that is used for automating web applications using Selenium. These questions cover various aspects of POM such as its importance, advantages, implementation, and best practices. They also focus on the key concepts and components of POM, its role in creating maintainable and scalable test automation scripts, and how it improves the overall test framework. These interview questions help the interviewer assess the candidate's knowledge and understanding of POM and their experience in implementing it in Selenium test automation projects.
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1 - What is Selenium and explain its benefits?
Selenium is an open source automation testing tool used for web applications. It automates the testing process by simulating user actions on web pages, such as clicking, typing, and submitting forms. The benefits of using Selenium are that it is free, has a large community support, and allows cross browser testing, making it an efficient and cost effective solution for web application testing.
2) What are the different components of Selenium?
Selenium has four components Selenium IDE, Selenium WebDriver, Selenium Grid, and Selenium Remote Control (RC). Selenium IDE is used for recording and playback of test cases, while Selenium WebDriver acts as a driver to execute the test cases. Selenium Grid is used for distributed testing, and Selenium RC is used to execute tests on different browsers and operating systems.
3) What is the programming language used in Selenium?
Selenium supports various programming languages such as Java, C#, Python, Ruby, and JavaScript. However, Java is the most widely used programming language for Selenium test automation because of its simplicity, robustness, and platform independence.
4) What are the advantages of using Selenium WebDriver over Selenium RC?
Selenium WebDriver is faster, efficient and more stable compared to Selenium RC. It also has a more sophisticated and intuitive API, making it easy to write and maintain test scripts. Additionally, Selenium WebDriver supports various programming languages, whereas Selenium RC only supports Java, JavaScript, and Ruby.
5) How to handle dynamic web elements in Selenium?
Dynamic web elements are elements whose properties change at runtime. To handle them, we can use techniques such as XPath, CSS selectors, and regular expressions. These methods allow us to locate the element by its properties, even if they change dynamically.
6) What is the difference between findElement() and findElements() in Selenium?
findElement() returns a single element, while findElements() returns a list of elements matching the given locator. If no element is found, findElement() will throw an exception, whereas findElements() will return an empty list.
7) What are different types of waits in Selenium?
Selenium has three types of waits Implicit, Explicit, and Fluent waits. Implicit wait pauses the execution for a given amount of time before throwing an exception. Explicit wait waits for a specific condition to occur before moving to the next step. Fluent wait waits for a specific amount of time for an element to become visible or invisible before throwing an exception.
8) How to handle alerts in Selenium?
To handle alerts, we can use the Alert class in Selenium. We can first switch to the alert by using the switchTo() method and then use getText(), accept(), or dismiss() methods to handle the alert message.
9) What is Data driven testing?
Data driven testing is a testing methodology in which the test data is separated from the test script, and the same test script is executed multiple times with different sets of input data. It helps in reducing the effort of writing and maintaining multiple test scripts.
10) How to handle multiple windows in Selenium?
To handle multiple windows, we can use the getWindowHandles() method to get the window handles and switch between them using the switchTo() method. You can use techniques such as window handling or switch to parent or child window based on the requirement.
11) What is Page Object Model (POM) in Selenium?
POM is a design pattern that defines the object oriented approach of creating web page models. It is used to create a separate class for each webpage, and the elements present on the page are defined as objects. This makes the code more organized, reusable and easy to maintain.
12) What are the best practices of using Selenium?
Some best practices of using Selenium are using unique and consistent locators, avoiding the use of Thread.sleep(), using explicit waits, organizing test cases in a modular and reusable way, and maintaining a good naming convention for test cases.
13) How to integrate Selenium with TestNG?
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To integrate Selenium with TestNG, we need to add the TestNG library to the project, configure TestNG in our IDE, organize test cases into TestNG test classes, and add annotations such as @BeforeTest, @Test, and @AfterTest.
14) What is the difference between Absolute and Relative XPath?
Absolute XPath starts from the root element of the HTML document, whereas Relative XPath starts from the current node. Relative XPath is more flexible and recommended as it is less susceptible to changes in the DOM structure.
15) How do you handle synchronization issues in Selenium?
Synchronization issues occur when there is a mismatch between the speed of the automation script and the speed of the application. To handle this issue, we can use implicit or explicit waits to wait for the page to load completely before executing the next step. We can also use synchronization methods like Thread.sleep() or wait() in Selenium to pause the execution for a specific time period.
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