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Selenium is a suite of tools for automated web testing.  It is composed of

Selenium IDE (Integrated Development Environment) :  It is a tool for recording and playing back.  It is a firefox plugin

WebDriver and RC:  It provide the APIs for a variety of languages like Java, .NET, PHP, etc. With most of the browsers Webdriver and RC works.

Grid: With the help of Grid you can distribute tests on multiple machines so that test can be run parallel which helps in cutting down the time required for running in browser test suites
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Selenium is a widely used open-source tool for automating web browsers. It allows developers to create scripts that can interact with web pages in a similar way to how a human user would. This makes it an invaluable tool for testing web applications and automating repetitive tasks.

In this article, we will be discussing a range of Selenium Interview Questions and Answers. These questions are designed to test your knowledge of Selenium, as well as your ability to think critically and solve problems. We will cover topics such as Selenium components, common challenges faced while using Selenium, and best practices for using Selenium in real-world scenarios.

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