Know the syntax, but can you explain why? Cracking the SDET Interview is a complete zero-to-mastery guide for SDET and QA automation interviews, built from ten years of real projects and interviews on both sides of the table. It covers Java, OOP and Collections from first principles; Selenium and Playwright; TestNG and Cucumber; REST API testing with Postman and REST Assured; SQL; Git, Jenkins, Docker and Kubernetes; and system design. It includes one complete automation framework built from scratch, 300+ interview questions mapped to the chapter that teaches each one, and 27 cheat sheets for the week before your interview. No prior experience required.