Selenium WebDriver
The industry-standard open-source framework for automating web browser interactions.
Full definition
Selenium WebDriver is the most widely used open-source tool for automating web browser testing. It provides APIs to interact with web elements — clicking buttons, filling forms, navigating pages — across all major browsers.
Selenium ecosystem:
- Selenium WebDriver: Core API for browser automation
- Selenium Grid: Run tests on multiple machines in parallel
- Selenium IDE: Browser extension for record-and-playback
Supported languages: Java, Python, JavaScript, C#, Ruby, Kotlin Supported browsers: Chrome, Firefox, Safari, Edge
Key WebDriver concepts:
- Locators: Finding elements (ID, CSS, XPath, class, name)
- Waits: Explicit, implicit, and fluent waits for dynamic content
- Page Object Model: Design pattern separating page structure from test logic
- Actions: Complex interactions (drag-drop, hover, right-click)
Selenium is the most requested automation skill in QA job listings. While newer tools like Playwright and Cypress are gaining popularity, Selenium remains the industry standard — especially in enterprise environments.
Interview tip
Most automation interviews include a live coding task. Practice: navigate to a site, find elements by different locators, interact with forms, handle waits and alerts.