1. Selenium Architecture & Core Concepts Q1: Explain Selenium WebDriver's architecture in detail Answer: Selenium WebDriver follows a client-server architecture with these key components: Client Libraries (Language Bindings) Available in Java, Python, C#, JavaScript, etc. Convert test script commands into HTTP requests via JSON Wire Protocol (or W3C WebDriver Protocol) Browser Drivers ChromeDriver (for Chrome), GeckoDriver (Firefox), etc. Act as intermediaries that translate HTTP requests into browser-specific actions Each browser has its own driver implementation Real Browsers Receive commands from their respective drivers Execute actions like click(), sendKeys() natively Visual Flow: Test Script → Language Binding → JSON Wire Protocol → Browser Driver → Actual Browser Key Protocols: Legacy: JSON Wire Protocol (Selenium 3) Modern: W3C WebDriver Protocol (Selenium 4+) Q2: How does Selenium interact with headless browsers? Answer with Technical Details: Headless browsers execute...