Which of the following is a popular open-source automation testing tool for web applications?a) JIRAb) Seleniumc) Appiumd) TestRail

To identify the popular open-source automation testing tool for web applications among the given options, let's analyze each choice:

1. JIRA: While JIRA is a widely used tool for project management and issue tracking, it is not primarily focused on automation testing.

2. Selenium: Selenium is a robust and popular open-source framework specifically designed for automating web applications for testing purposes. It supports multiple programming languages and can simulate user interactions with web browsers.

3. Appium: Appium is also an open-source tool, but it is primarily intended for automating mobile applications on Android and iOS platforms, although it can test mobile web apps as well.

4. TestRail: TestRail is a test case management tool that helps organize testing efforts but is not an automation tool.

Final Answer

The correct answer is b) Selenium.