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Amazon Software Developer Interview Questions and Answers
361 Interview questions
Generate all possible parentheses for a given integer n.
Use recursion to generate all possible combinations of parentheses.
Start with an empty string and keep adding opening and closing parentheses.
Keep track of the number of opening and closing parentheses used.
Stop recursion when the number of opening and closing parentheses reaches n.
Add the generated combination to the result array.
To find a loop in a linked list, we can use the Floyd's cycle-finding algorithm.
Initialize two pointers, slow and fast, both pointing to the head of the linked list.
Move slow pointer by one step and fast pointer by two steps at each iteration.
If there is a loop, the slow and fast pointers will eventually meet.
To prove the algorithm, we can use mathematical induction and the concept of tortoise and hare.
Spiral order traversal of a binary tree
Use a stack and a queue to traverse the binary tree in a spiral order
Start with the root node and add it to the stack
While the stack is not empty, pop a node from the stack and add its children to the queue
If the stack is empty, swap the stack and queue
Repeat until both stack and queue are empty
The question asks how to feed a 2D matrix with values based on the given binary tree.
Traverse the binary tree and for each node, update the corresponding row in the matrix
Use a recursive function to update the matrix values
Start with the root node and recursively update its descendants
Set M[i, j] to 1 if node i is an ancestor of node j
Repeat the process for all nodes in the binary tree
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Find the first occurrence of a given key element in a sorted array with duplicates.
Use binary search to find the key element.
If the key element is found, check if it is the first occurrence by checking the previous element.
If the key element is not found, return -1.
Deploy minimum guards on a city's road network ensuring each road has at least one guard at its ends.
Model the city as a graph where intersections are nodes and roads are edges.
Use a greedy algorithm to select nodes (intersections) to place guards.
A possible approach is to use a vertex cover algorithm, which finds the smallest set of vertices covering all edges.
For example, in a triangle graph with edges (1,2), (2...
Create a deep copy of a linked list with next and random pointers.
Traverse the original list and create a copy of each node.
Insert the copied nodes right next to the original nodes.
Set the random pointers of the copied nodes using the original nodes' random pointers.
Separate the copied list from the original list.
Rotated arrays can be solved using binary search or linear search to find the minimum element or search for a target.
Identify the pivot point where the array is rotated. Example: [4, 5, 6, 7, 0, 1, 2] is rotated at index 3.
Use binary search to find the target efficiently. If the middle element is greater than the first element, search the left half.
If the middle element is less than the first element, search the r...
Use file locking mechanisms like flock or lockfile to make a file mutually exclusive on a shared file system.
Use flock or lockfile to acquire a lock on the file before accessing it.
Release the lock once the operation is complete.
Ensure all processes accessing the file use the same locking mechanism.
Example: flock /path/to/file -c 'command to execute'
Example: lockfile /path/to/file && command to execute && rm -f /p...
Algorithm to find the best buying and selling dates for maximum profit from given stock prices array.
Iterate through the array and keep track of minimum price and maximum profit.
If current price is less than minimum price, update minimum price.
If current price minus minimum price is greater than maximum profit, update maximum profit and buying and selling dates.
Return buying and selling dates.
Example: [10, 7, 5, 8...
Amazon Software Developer Interview Experiences
197 interviews found
Anonymous
I appeared for an interview in Feb 2025.
(2 Questions)
- Q1. Self introduction
- Q2. Hi , good morning this is kamakshi from someswaram Dr br Ambedkar konaseema district Andhra
Coding questions about our technical skills
(1 Question)
- Q1. About our skills
(1 Question)
- Q1. According to the skills to move hr
I applied via Company Website and was interviewed in Nov 2024. There was 1 interview round.
(5 Questions)
- Q1. Why Amazon Software Developer?
- Ans.
Amazon offers challenging projects, innovative technologies, and a collaborative work environment.
Opportunity to work on cutting-edge projects like Amazon Web Services (AWS) or Alexa
Access to vast resources and tools for development
Collaborative work culture that encourages learning and growth
Opportunity to impact millions of customers worldwide
Competitive compensation and benefits package
- Q2. Why do you want to work at amazon ?
- Ans.
I want to work at Amazon because of their innovative culture, vast resources, and opportunities for growth.
Amazon is known for its innovative culture and cutting-edge technology.
They have vast resources and a global reach, providing opportunities to work on impactful projects.
Amazon offers great career growth and development opportunities for software developers.
I admire Amazon's customer-centric approach and focus on ...
- Q3. What are your strengths and weakness?
- Ans.
My strengths include problem-solving skills and attention to detail. My weakness is sometimes being too critical of my own work.
Strengths: problem-solving skills
Strengths: attention to detail
Weakness: being too critical of my own work
- Q4. How would you solve?
- Ans.
I would solve the problem by breaking it down into smaller tasks, analyzing requirements, designing a solution, coding, testing, and debugging.
Analyze requirements thoroughly before starting the development process
Break down the problem into smaller tasks to make it more manageable
Design a solution architecture that meets the requirements and is scalable
Code the solution using best practices and coding standards
Test th...
- Q5. What are the short term and long-term for teame or organisation?
- Ans.
Short term goals focus on immediate tasks and objectives, while long-term goals involve strategic planning and growth.
Short term goals may include completing a specific project, improving team communication, or implementing a new software feature.
Long-term goals could involve expanding the team, increasing market share, or developing new products or services.
Short term goals help keep the team focused and motivated, wh...
Interview Preparation Tips
- Excel
- Data Entry
- Project Management
- Ms World
- Programming
- Google software developer
- Microsoft software developer
1. Understand Amazon's culture:?
2. Review job description ?
3.update your resume.? B
INTERVIEW PREPARATION
1.Research the team and role ?
2. Prepare to talk about your experience?
3.How would you solve?
4.What are your strengths and weakness?
I applied via Company Website and was interviewed in Jun 2024. There were 6 interview rounds.
It was a coding test on Hackerrank with 3 Leetcode easy to medium-level questions.
(1 Question)
- Q1. Phone Interview Round - LP-based discussion followed by an easy DSA question.
(1 Question)
- Q1. Loop Round 1 (Hiring Manager Round) - LP-based discussion followed by a system design question (HLD) which was basically around what the hiring team is working on.
(1 Question)
- Q1. Loop Round 2 (Coding Round) - LP-based discussion followed by a Leetcode medium coding question.
(1 Question)
- Q1. Loop Round 3 (Coding Round) - LP-based discussion followed by an OOD question which was fairly simple but the requirements were not clarified very well even on asking multiple times. Ask and clarify to the...
(1 Question)
- Q1. Loop Round 4 (Coding Round) (Bar Raiser) - LP-based discussion followed by a Leetcode medium coding question.
Interview Preparation Tips
- Data Structures
- Algorithms
- System Design
- Object Oriented Design
- Amazon Leadership Principles
Stay confident.
For System Design and OOD, always clarify the requirements since it's very open-ended and subjective. And do keep an eye on the clock.
I applied via Campus Placement and was interviewed in Nov 2024. There were 3 interview rounds.
Good but tough i dint do well but still qualified
Very tough only graphs dp and linked lists were asked
(2 Questions)
- Q1. Reverse a linked list
- Q2. Dfs of a graph
- Ans.
Depth-first search (DFS) is a graph traversal algorithm that explores as far as possible along each branch before backtracking.
DFS starts at a selected node and explores as far as possible along each branch before backtracking.
It uses a stack to keep track of nodes to visit next.
DFS can be implemented recursively or iteratively.
Example: DFS traversal of a graph starting from node A: A -> B -> D -> E -> C -&...
Interview Preparation Tips
Skills evaluated in this interview
(2 Questions)
- Q1. Least Common Ancestor of binary tree
- Q2. Smallest path to reach from a to b point in matrix
- Ans.
Use Dijkstra's algorithm to find the smallest path from point a to point b in a matrix.
Implement Dijkstra's algorithm to find the shortest path in a matrix
Create a matrix representation of the graph with weights on edges
Start from point a and explore all possible paths to reach point b
Hacker rank test include 2 code and mcg questions
(2 Questions)
- Q1. Coding based on linked list
- Ans.
Linked lists are dynamic data structures that consist of nodes, each containing data and a reference to the next node.
A linked list consists of nodes, where each node has data and a pointer to the next node.
Types of linked lists include singly linked lists, doubly linked lists, and circular linked lists.
Example of a singly linked list: Node1 -> Node2 -> Node3 -> NULL.
Doubly linked list allows traversal in both...
- Q2. String related coding questions
Two coding questions, both passed 100%
(1 Question)
- Q1. What is the problem of identifying duplicates in an array?
- Ans.
Identifying duplicates in an array involves finding and removing elements that appear more than once.
Iterate through the array and use a hash set to keep track of elements seen so far.
If an element is already in the hash set, it is a duplicate and can be removed.
Example: ['apple', 'banana', 'apple', 'orange'] - 'apple' is a duplicate.
Example: ['cat', 'dog', 'bird', 'cat'] - 'cat' is a duplicate.
2-3 coding questions with some mcq
(2 Questions)
- Q1. Live coding with the hr
- Q2. Binary Trees based traversal
I appeared for an interview in Apr 2025, where I was asked the following questions.
- Q1. It was a DFS based graph question [Leetcode easy]
- Q2. Could you describe the process for designing a data structure that allows for all create and delete operations in O(1) time while also implementing a function that generates a random number?
- Ans.
Design a data structure for O(1) create/delete and random number generation using a hash map and an array.
Use a hash map to store elements with their indices for O(1) access.
Maintain an array to store the actual elements for O(1) random access.
On insertion, add the element to the array and update the hash map.
On deletion, swap the element with the last element in the array, remove it, and update the hash map.
To get a r...
I appeared for an interview in May 2025, where I was asked the following questions.
- Q1. Java Sql Inheritance
- Q2. Java Polymorphism
Amazon Interview FAQs
Some of the top questions asked at the Amazon Software Developer interview -
The duration of Amazon Software Developer interview process can vary, but typically it takes about less than 2 weeks to complete.
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