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I was interviewed in Aug 2017.
Merge Sort is a divide and conquer algorithm that sorts an array by dividing it into two halves, sorting them separately, and then merging the sorted halves.
Divide the array into two halves
Recursively sort the two halves
Merge the sorted halves
Find pairs of integers in a BST whose sum is equal to a given number.
Traverse the BST and store the values in a hash set.
For each node, check if (X - node.value) exists in the hash set.
If yes, add the pair (node.value, X - node.value) to the result.
Continue traversal until all nodes are processed.
Merge overlapping time intervals into mutually exclusive intervals.
Sort the intervals based on their start time.
Iterate through the intervals and merge overlapping intervals.
Output the mutually exclusive intervals.
Example: [(1,3), (2,6), (8,10), (15,18)] -> [(1,6), (8,10), (15,18)]
Different types of hashing and alternative for Linear Chaining
Different types of hashing include division, multiplication, and universal hashing
Alternative for Linear Chaining is Open Addressing
Open Addressing includes Linear Probing, Quadratic Probing, and Double Hashing
An AVL tree is a self-balancing binary search tree where the heights of the left and right subtrees differ by at most one.
AVL tree is a binary search tree with additional balance factor for each node.
The balance factor is the difference between the heights of the left and right subtrees.
Insertion and deletion operations in AVL tree maintain the balance factor to ensure the tree remains balanced.
Rotations are performed ...
Find the minimum number of squares whose sum equals to a given number n.
Use dynamic programming to solve the problem efficiently.
Start with finding the square root of n and check if it is a perfect square.
If not, then try to find the minimum number of squares required for the remaining number.
Repeat the process until the remaining number becomes 0.
Return the minimum number of squares required for the given number n.
Insertion sort for a singly linked list.
Traverse the list and compare each node with the previous nodes
If the current node is smaller, swap it with the previous node
Repeat until the end of the list is reached
Time complexity is O(n^2)
I applied via Company Website and was interviewed in Nov 2024. There was 1 interview round.
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
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
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
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...
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...
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.
What people are saying about Amazon
I applied via campus placement at Dehradun Institute of Technology, Dehradun 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
Reverse a singly linked list and return the reversed list.
Iterate through the linked list and reverse the pointers
Use three pointers to keep track of current, previous, and next nodes
Update the head pointer to the last node after reversing
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 -&
Amazon interview questions for designations
The least common ancestor of a binary tree is the node that is the lowest common ancestor of two given nodes in the tree.
Start from the root node and recursively search for the given nodes in the left and right subtrees.
If one node is found in the left subtree and the other in the right subtree, then the current node is the least common ancestor.
If both nodes are found in the left subtree, then the least common ancesto...
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
Get interview-ready with Top Amazon Interview Questions
Hacker rank test include 2 code and mcg questions
Two coding questions, both passed 100%
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
I applied via Referral and was interviewed in Aug 2024. There were 3 interview rounds.
COding test consist of 2 question of easy level, both of easy level and queue
I applied via Internshala and was interviewed in Nov 2024. There were 3 interview rounds.
Genral Aptitude questions
Normal Coding Test DSA, Data Strcuures
Mostly DSA and problem solving.
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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