Amazon's interview process can vary depending on the position you're applying for, but here's a general overview of what you can expect when interviewing for a technical role at Amazon:

Online Application: You start by submitting your resume and application through Amazon's careers website. Make sure your resume is tailored to the specific job you're applying for.

Resume Review: Amazon's recruitment team will review your application and resume. If your qualifications match the job requirements, you may be selected for the next round.

Online Assessment: Amazon often uses online assessments to evaluate candidates' technical skills and problem-solving abilities. This may include coding challenges, multiple-choice questions, or other relevant tests. The specific assessment will depend on the role you're applying for.

Phone Screen: If you pass the online assessment, you may have a phone screen with a recruiter or a hiring manager. This interview typically focuses on your background, experience, and behavioral questions to assess your fit for the company culture.

Technical Interviews: For technical roles, Amazon typically conducts several rounds of technical interviews. These may be conducted in person (on-site), over the phone, or via video conferencing. You can expect a mix of coding questions, system design questions, and behavioral questions. Amazon is known for its rigorous technical interviews, so be prepared to dive deep into your technical knowledge and problem-solving skills.

Questions related to strings can include tasks like string reversal, checking for palindrome strings, or implementing string search algorithms like Knuth-Morris-Pratt (KMP) or Rabin-Karp.

Binary Trees and Graphs: Amazon often asks questions involving binary trees, such as finding the lowest common ancestor, tree traversal algorithms (e.g., in-order, pre-order, post-order), or checking if a binary tree is a binary search tree. Graph-related questions might involve traversals, shortest path algorithms, or topological sorting.

Dynamic Programming: Expect questions that require dynamic programming solutions, such as the 0/1 knapsack problem, calculating Fibonacci numbers, or finding the longest common subsequence.