Selenium Interview Question and Answers1) What is an Object Repository, and how does it work?An object repository is a critical component of any UI automation since it allows a tester to keep all of the objects that will be utilised in the scripts in one or more centralised locations rather than scattering them throughout the test scripts. 2) What is the Selenium Grid and how does it work?The tests were delivered to the hub by Selenium Grid. These tests are routed through Selenium Webdriver, which opens the browser and runs the test. It is possible to run tests in parallel using the whole test suite. 3) Is Selenium grid suitable for performance testing?Yes. However, it does not perform as well as a specialised Performance Testing tool such as Loadrunner. 4) What are the benefits of using Webdriver instead of Selenium Server?You don't require the Selenium-WebDriver plugin if you're using Selenium-WebDriver.Selenium Server is unique in that it use a completely separate technology.Selenium Server has Selenium RC capabilities, which is needed for backwards compatibility with Selenium 1.0.Selenium Web driver provides direct calls to browsers, taking advantage of each browser's inherent automation functionality, whereas Selenium RC relies on the selenium server injecting Javascript into the browser.