Selenium Java Code Interview Questions
Selenium Java Code Interview: Best Practices and Commonly Asked Questions
Selenium is a widely used software testing tool for automating web applications. For Java developers, there are several important code-related interview questions that may be asked during a Selenium interview. These questions may cover topics such as creating test cases, handling elements and locating them on a web page, validating test results, or dealing with advanced scenarios like handling pop-ups or frames. Answering these questions correctly requires a solid understanding of Java concepts and practices, as well as a good knowledge of Selenium APIs and methods. Preparing for these questions can greatly improve the chances of success in a Selenium Java code-based interview.
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1 - What is Selenium?
Selenium is an open-source automation testing tool used for automating web applications. It allows testers to write codes in various programming languages such as Java, Python, and C# to automate web-based tasks. It consists of different components like Selenium IDE, Selenium WebDriver, Selenium Grid, and Selenium IDE.
2) What are the advantages of using Selenium for testing?
Selenium offers various benefits for automation testing such as cross-browser compatibility testing, easy integration with other tools, multiple language support, and cost-effectiveness as it is open-source. It also allows for parallel testing, reduces manual testing efforts, and provides detailed test reports.
3) What are the different types of locators used in Selenium?
Selenium supports multiple locators to identify elements on a web page such as ID, name, class, tag name, link text, partial link text, and CSS and XPath locators. It allows testers to choose the best locator based on the element's unique properties.
4) What is the difference between Selenium and QTP?
Selenium is an open-source tool while QTP is a licensed tool. Selenium only supports web-based applications, whereas QTP can automate desktop, web, and mobile applications. Selenium requires programming knowledge to write test scripts while QTP offers record and playback features without coding.
5) What are the different types of testing that can be performed using Selenium?
Selenium can be used for functional testing, regression testing, GUI testing, and cross-browser testing. With its integration with tools like TestNG and JUnit, Selenium can also perform data-driven testing and perform parallel testing on multiple browsers.
6) How does Selenium handle pop-up windows and frames?
Selenium provides methods to handle pop-up windows and frames using switchTo() command. It allows switching between different frames and windows to interact with elements present in them.
7) What is the use of WebDriver and Selenium IDE?
Selenium WebDriver is used for writing automation scripts in various programming languages. On the other hand, Selenium IDE is a record and playback tool that is used for creating basic test cases and quickly generate locators.
8) Can Selenium be used for mobile testing?
Yes, Selenium can be used for mobile testing with the help of Appium, an open-source mobile app automation tool that works with Selenium WebDriver. It allows testers to perform automated mobile testing on both Android and iOS devices.
9) How can you handle dynamic web elements using Selenium?
Selenium has a variety of strategies to handle dynamic web elements such as using XPath, CSS selectors, and regular expressions. It also offers the option to create custom functions to handle dynamic elements efficiently.
10) How can you create a test suite using Selenium?
Test suites can be created in Selenium by using TestNG or JUnit. TestNG provides an annotation-based approach to create test suites, while JUnit uses classes and methods to create test suites. They both provide parallel execution and grouping of test cases, making it easier to manage the test suite.
11) How can you handle multiple windows using Selenium?
Selenium provides the switchTo() function to handle multiple windows. It allows switching between different windows using their handle or window name.
12) What is the difference between close() and quit() commands in Selenium?
The close() command closes the current active window, while the quit() command closes all the windows and ends the Selenium session. If multiple windows are open, the close() command will only close the current window, while the quit() command will close all windows and end the session.
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13) What are the different types of waits in Selenium?
Selenium provides three types of waits - implicit, explicit, and fluent waits. Implicit waits tell Selenium to wait for a specified amount of time before throwing an exception if the element is not found. Explicit waits instruct Selenium to wait for a certain condition to occur before executing the next command. Fluent waits allow specifying a maximum amount of time to wait for a condition and polling frequency.
14) Can Selenium handle dynamic web tables?
Yes, Selenium can handle dynamic web tables by using the findElements() function. It returns a list of elements that can be iterated to find the desired value.
15) How can you handle alerts and pop-ups in Selenium?
Selenium offers the switchTo() command to handle alerts and pop-ups. It allows switching the control from the current window to the alert window. From there, various methods can be used to handle different types of alerts and pop-ups.
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