Selenium Coding Interview Questions
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Selenium Coding Interview Questions
Selenium coding interview questions are used to assess a candidate's knowledge and skills in using Selenium, a popular open-source automation tool, for testing web applications. These questions cover various topics such as Selenium WebDriver, TestNG, frameworks like Page Object Model, and automation concepts like XPath and handling dynamic elements. They are designed to test a candidate's coding abilities, problem-solving skills, and understanding of the software development lifecycle, making them an important part of the recruitment process for automation and testing roles. Answering these questions requires a deep understanding of Selenium and its various features, as well as hands-on experience in writing efficient and scalable automation scripts.
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1 - What is Selenium?
Selenium is an open source automation tool used for automating web applications. It provides a platform for writing and executing test cases using various programming languages like Java, Python, and C#, among others.
2) What are the different components of Selenium?
Selenium has four main components: Selenium IDE, Selenium RC, WebDriver, and Selenium Grid. Selenium IDE and Selenium RC are now deprecated, and WebDriver is the preferred tool for automating web applications.
3) What is the difference between Selenium IDE and Selenium WebDriver?
Selenium IDE is a record and playback tool used for creating simple test cases, while Selenium WebDriver is a programming interface that allows for more robust and complex testing scenarios.
4) What is a locator in Selenium?
Locators are used to identify the elements on a web page that need to be interacted with during test execution. They can be based on attributes like ID, name, class name, or XPath of the element.
5) What is the advantage of using Selenium WebDriver?
Selenium WebDriver allows for cross browser testing, meaning the same test can be run on different browsers. It also supports various programming languages, making it a flexible and versatile tool.
6) How do you handle pop up windows in Selenium?
Selenium provides a switchTo() method to handle pop up windows. This method allows you to switch the driver's focus to the pop up window and perform actions on it.
7) What are the different types of waits in Selenium?
There are three types of waits in Selenium implicit wait, explicit wait, and fluent wait. Implicit wait is used to set a default wait time for the entire test. Explicit wait is used to wait for a specific element to appear on the page. Fluent wait is a combination of explicit wait and polling, where the test waits for a condition to be met before proceeding.
8) What is a test framework?
A test framework is a set of guidelines and best practices that are used while writing automated test cases. It provides a structure for organizing test cases and facilitates easy maintenance and debugging.
9) How do you handle dynamic elements in Selenium?
Dynamic elements are those whose attributes change dynamically on page load or interaction. They can be handled using XPath or CSS selectors that target a specific parent element and then navigate to the desired dynamic element.
10) What is Selenium Grid used for?
Selenium Grid is used for parallel and distributed testing. It allows for the execution of multiple test cases on different browsers and operating systems simultaneously, thereby reducing the overall execution time.
11) How do you handle exceptions in Selenium?
Selenium throws exceptions when a failure occurs during execution. These exceptions need to be handled using try catch blocks and appropriate actions can be taken based on the exception type.
12) What are the advantages of using Selenium for automation testing?
Some of the benefits of using Selenium for automation testing include faster execution, cross browser compatibility, support for multiple programming languages, and effective reporting.
13) How do you maximize browser window in Selenium?
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Selenium provides the maximize() method to maximize the browser window. This method can be used on the WebDriver instance to maximize the current window.
14) What are the different types of navigation commands in Selenium?
There are three types of navigation commands in Selenium back(), forward(), and refresh(). These commands can be used to navigate to the previous page, the next page and to refresh the current page, respectively.
15) What are some best practices for using Selenium?
Some best practices for using Selenium include maintaining a well organized test framework, using appropriate waits, using meaningful names for test cases and classes, and regularly updating the test automation code. It is also essential to have a good understanding of the application being tested to write efficient and reliable test cases.
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