Amazon Interview Questions and Answers

Landing a Software Development Engineer (SDE) position at Amazon is a dream for many aspiring software engineers. Known for its interview process, Amazon evaluates candidates on a variety of technical and behavioral competencies. Preparing effectively for this process is crucial, and understanding the types of questions typically asked can give candidates a significant advantage.

Here, we will explore some of the Top Amazon SDE interview questions, covering technical knowledge.

1. K largest elements from a big file or array.

2. Find a triplet a, b, c such that a² = b² + c². Variations of this problem include finding a triplet with a sum equal to 0. Find a pair with a given sum. All such questions are efficiently solved using hashing. – Practice here

3. Binary tree traversal questions like left view, right view, top view, bottom view, maximum of a level, minimum of a level, children sum property, diameter, etc.

4. Convert a Binary tree to DLL – Practice here

5. Lowest Common ancestor in a Binary Search Tree and Binary Tree.

6. Implement a stack with push(), pop() and min() in O(1) time.

7. Reverse a linked list in groups of size k – Practice here

8. Given two numbers represented by two linked lists, write a function that returns sum list – Practice here

9. Rotate a matrix by 90 degree.

10. Stock span problem

11. Next greater element

12. Some Dynamic Programming problems like:

• Maximum sum subarray such that no elements are consecutive – Practice here
• Edit distance
• Assembly line scheduling

13. Why Amazon?

14. Questions about projects done in previous company or final year.

15. Important Links :

• Amazon Interview Experiences
• Amazon Practice Questions
• Amazon’s most frequently asked Questions – Set 2
• Amazon Recruitment Process

Amazon Interview Video.

What are the most common types of technical questions asked in an Amazon SDE interview?

Amazon SDE interviews commonly feature questions on data structures, algorithms, coding problems, and system design. These assess a candidate’s problem-solving skills and technical knowledge.

How important are Amazon’s leadership principles in the interview process?

Amazon’s leadership principles are crucial. Behavioral questions are designed to evaluate a candidate’s alignment with these principles, ensuring they fit well within the company culture.

What is the STAR method, and how should I use it in my Amazon SDE interview?

The STAR method (Situation, Task, Action, Result) is a structured way to answer behavioral questions, helping you provide clear and concise responses that highlight your past experiences effectively.

4. How can I prepare for system design questions in an Amazon SDE interview?

To prepare for system design questions, study scalable system architecture concepts, practice designing complex systems, and review common design patterns and trade-offs.