How do I prepare for Amazon coding interview?

Preparing for an Amazon coding interview involves a combination of technical proficiency, problem-solving skills, and a good understanding of Amazon's leadership principles. Here's a structured approach to get ready for the big day:

Understand Amazon's Interview Process:

1. Leadership Principles: Amazon places a strong emphasis on its 16 leadership principles. Be prepared to discuss past experiences that demonstrate these principles.

2. Technical Questions: Expect coding questions that test your knowledge of data structures, algorithms, and system design.

Technical Preparation:

1. Data Structures & Algorithms:

   • Be proficient in fundamental data structures (like arrays, linked lists, trees, graphs) and algorithms (such as sorting, searching, recursion).
   • Practice problems on platforms like LeetCode, HackerRank, or DesignGurus.io.

2. Language Proficiency:

   • Choose a programming language you are most comfortable with (commonly Java, Python, or C++ for Amazon interviews).
   • Be fluent in writing clean and efficient code in your chosen language.

3. Mock Coding Interviews:

   • Practice with timed mock interviews.
   • Focus on speaking out loud while coding, explaining your thought process.

4. System Design:

   • For senior roles, be prepared for system design questions. Understand how to architect scalable, efficient systems.

Behavioral Preparation:

1. Leadership Principles:

   • Review Amazon's leadership principles in detail.
   • Prepare specific examples from your past experiences that demonstrate these principles.

2. STAR Method:

   • Use the Situation, Task, Action, Result (STAR) method to structure your responses to behavioral questions.

A Week Before the Interview:

• Revise Key Concepts: Go over data structures, algorithms, and system design principles.
• Mock Interviews: Continue practicing with mock interviews, focusing on both coding and behavioral questions.
• Rest and Relax: Ensure you're well-rested and mentally prepared.

On the Interview Day:

• Understand the Problem: Carefully listen to the problem and ask clarifying questions.
• Think Aloud: Explain your thought process and approach before you start coding.
• Write Clean Code: Ensure your code is readable and tidy.
• Test Your Code: Before you say you're finished, test your code with different inputs.

Post-Interview:

• Reflect on Your Performance: Think about what went well and what could be improved.
• Follow-Up: Send a thank-you email to your interviewers.

Additional Tips:

• Time Management: Be aware of the time and manage it effectively during coding problems.
• Stay Calm and Positive: If you get stuck, take a deep breath and try to work through the problem methodically.

Preparing for Amazon's coding interview is about balancing technical skills with demonstrating the qualities they value in their employees. Practice and preparation are key to showcasing your best self.

Ref: Amazon interview guide.