Selenium is an open-source automated testing framework that is used to validate web applications across different browsers and platforms. It supports multiple programming languages and operating systems. Selenium has four main components: Selenium IDE for recording and playing back tests, Selenium RC for remotely controlling browsers, Selenium WebDriver for browser automation, and Selenium Grid for distributed testing.

1.  Selenium is a free (open-source) automated
testing framework used to validate web
applications across different browsers and
platforms.
 You can use multiple programming
languages like Java, C#, Python, etc to
create Selenium Test Scripts.

2.  Selenium is open source Tool.
 Its Supports different operating systems.
 Its Supports Multiple programming
languages.
 Its Supports Different types of browsers.
 Selenium supports Integrated with different
tools
 It is directly communicate with browsers.

3.  Selenium is not just a single tool but a suite
of software, each catering to different testing
needs of an organization.
 It has four components:
1. Selenium Integrated Development
Environment (IDE)
2. Selenium Remote Control (RC)
3. Selenium WebDriver
4. Selenium Grid

4.  A WebDriver is a browser automation
framework. It accepts commands and sends
them to a browser.
Code==>W3Sprotocol==>WebDriver==>Web
Browser
WebDriver driver=new ChromeDriver();
ChromeDriver driver=new ChromeDriver();

5. 1. Browser Methods.
2. Webelements Methods.
3. Navigation Methods.
4. Wait Methods.
5. Switch Case Methods

6.  Anything that is present in the webpage is
called Webelement.
Ex.Boxes,lables,buttons,elements,etc…
 Identify the Webelements Using Locators.

7.  X-path (XML Path language) is Query
Language for selecting nodes from an XML
document or Finding elements in HTML Web
page.
X-path Two Types:
1.Absolute Xpath
2.Relative Xpath