After a month, I also experienced the difficulty of Amazon's 2026 SDE OA (Online Assessment), and barely passed within 4 hours. Here's a brief chat... Those who are preparing for the OA can use this as a reference: ✅ It is mainly divided into 4 parts: ① 2 Coding questions: Need to complete within 70 minutes. It mainly examines whether you can write bug-free code on basic topics such as arrays, Hash, BFS, etc. The implementation questions have many details but simple logic. The core is readability, boundary handling, and code quality. Among them, what left a deeper impression is: Amazon developers use multiple algorithms to encrypt passwords. You need to find the minimum number of replacements required to turn a string into a palindrome, and return the lexicographically smallest result among all optimal solutions. ② Work Simulation: About 25 minutes. Based on example scenarios of Amazon work, interact with colleagues through emails and instant messages, make judgments and take actions. ③ Work Approach: A total of 21 questions (divided into 7 pages, 3 questions per page), estimated to be completed in 10 minutes. It examines how you handle software engineering work. ④ Work Style: About 57 questions, estimated to be completed in 10 minutes. Each question consists of two statements. Based on your own situation, choose Most Like Me or More Like Me. Just select the option that best fits your preference.