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Amazon SDE Interview Questions and Answers
57 Interview questions
Design a system using Max Heap to find the costliest element from a box when an element is picked.
Implement a Max Heap data structure to store the elements in the box.
Whenever an element is picked, the costliest element can be found at the root of the Max Heap.
After picking an element, update the Max Heap by removing the root and reorganizing the heap.
Ensure the Max Heap property is maintained during insertion and...
Memory leakage is a situation where a program fails to release memory it no longer needs.
Memory leakage can cause a program to slow down or crash due to insufficient memory.
It is caused by programming errors such as not freeing allocated memory or losing references to it.
Examples include forgetting to close a file or database connection, or not releasing memory allocated for a variable.
Memory leakage can be detect...
LRU cache is a data structure that stores most recently used items and discards least recently used items.
LRU stands for Least Recently Used
It is implemented using a doubly linked list and a hash map
When an item is accessed, it is moved to the front of the list
When the cache is full, the least recently used item is removed from the end of the list
Example: A web browser cache that stores recently visited web pages
Typing amazon.com in the browser's address bar takes you to Amazon's website.
The browser sends a request to the DNS server to resolve the domain name 'amazon.com' to an IP address.
The browser establishes a TCP connection with the server at the resolved IP address.
The browser sends an HTTP request to the server for the homepage of Amazon's website.
The server responds with the HTML code for the homepage, which the b...
What people are saying about Amazon
The transaction process involves transferring funds from one account to another. A scheme is designed to ensure secure and accurate transfers.
Verify the availability of sufficient funds in the sender's account
Authenticate the sender's identity and authorization for the transaction
Deduct the transfer amount from the sender's account balance
Initiate a request to transfer the funds to the recipient's account
Validate ...
ACID properties ensure reliability and consistency in database transactions.
ACID stands for Atomicity, Consistency, Isolation, and Durability.
Atomicity ensures that a transaction is treated as a single unit of work, either all or none of its operations are executed.
Consistency ensures that a transaction brings the database from one valid state to another.
Isolation ensures that concurrent transactions do not interf...
To find kth-smallest element in BST, perform inorder traversal and return the kth element.
Perform inorder traversal of the BST
Maintain a counter variable to keep track of the number of nodes visited
When the counter reaches k, return the current node's value
If k is greater than the number of nodes in the BST, return null or throw an exception
Find the second largest element in an array.
Sort the array and return the second last element
Iterate through the array and keep track of the two largest elements
Use a priority queue to find the second largest element
Given a sorted array with repeated elements, find the occurrence of a given element using binary search.
Use binary search to find the first occurrence of the element
Use binary search to find the last occurrence of the element
Calculate the occurrence by subtracting the indices of the last and first occurrences and adding 1
Implement a data structure and algorithm to print all files in a directory, including sub-directories.
Use an n-ary tree or stack to represent the directory structure
Implement a BFS or DFS algorithm to traverse the directory and print files
Handle sub-directories recursively
Consider using a queue or stack to keep track of directories to visit
Amazon SDE Interview Experiences
45 interviews found
Anonymous
Selected
I applied via Referral and was interviewed in Dec 2024. There were 2 interview rounds.
OA consisted of two DSA questions.
(1 Question)
- Q1. Was asked dsa based questions.
Vijayalakshmi Chidambaram
(2 Questions)
- Q1. General behavioral kinda questions on my last project
- Q2. LLD question where coding in 30 mins
Selected
I applied via LinkedIn and was interviewed in Nov 2024. There were 3 interview rounds.
Simple Normal DSA Question
Focus on DSA and optimization
Project Discussion and some Date structure questions
Interview Preparation Tips
Selected
Good DSA Questions
Recursion, Graph and Tree
I applied via Company Website and was interviewed in Aug 2024. There were 2 interview rounds.
(2 Questions)
- Q1. String pattern matching
- Q2. Behavioral questions
(2 Questions)
- Q1. Behavioral questions
- Q2. BFS file system
There are two straightforward data structure and algorithm questions, while the others primarily consist of multiple-choice questions, mostly focusing on nodes and Python.
In the telephonic round, they primarily assess your problem-solving skills. The interviewer asked me a binary search question, which I was able to solve, but it took me a considerable amount of time to arrive at the solution. This was likely the main reason for my rejection.
Aryan Verma
Selected
I applied via Naukri.com and was interviewed in Sep 2024. There was 1 interview round.
Find the order of excecution in sql
Interview Preparation Tips
Yatharth Singh
I applied via LinkedIn and was interviewed in Nov 2024. There was 1 interview round.
It was a one hour DS Algo Round based on recursion and DP. I managed to get to the logic for the problem but couldn't execute compltely due to time constraints
I applied via Naukri.com and was interviewed in May 2024. There were 2 interview rounds.
HACKER RANK TEST WITH MEDIUM LEVEL QUESTIONS
(3 Questions)
- Q1. CREATE A LINKED LIST
- Ans.
A linked list is a data structure consisting of nodes where each node points to the next node in the sequence.
Create a Node class with data and next pointer
Initialize a head pointer to null
Add nodes by updating next pointers
- Q2. FIND THE LOOP IN LINKED LIST
- Ans.
To find a loop in a linked list, use Floyd's Tortoise and Hare algorithm.
Use two pointers, slow and fast, to traverse the linked list.
If there is a loop, the two pointers will eventually meet at the same node.
To find the start of the loop, reset one pointer to the head and move both pointers at the same pace.
- Q3. QUESTION BASED ON DYNAMIC PROGRAMMING
Interview Preparation Tips
- Data Structures
- Algorithms
- Java
Skills evaluated in this interview
Selected
I applied via Company Website and was interviewed in Jul 2024. There were 5 interview rounds.
SLiding window problem
Tree problem variation
DP Problems same questions but with different cases
(2 Questions)
- Q1. Experience with last company
- Ans.
I worked at a tech startup where I developed web applications and implemented new features.
Led a team of developers to successfully launch a new mobile app
Implemented a new payment gateway system to improve user experience
Collaborated with product managers to prioritize and deliver features on time
- Q2. How you handle pressure
- Ans.
I handle pressure by staying organized, prioritizing tasks, and taking breaks when needed.
I prioritize tasks based on deadlines and importance
I break down large tasks into smaller, manageable steps
I communicate with team members or supervisors if feeling overwhelmed
I practice mindfulness techniques like deep breathing or meditation to stay calm
(1 Question)
- Q1. Behavioural ROund
Amazon Interview FAQs
Some of the top questions asked at the Amazon SDE interview -
The duration of Amazon SDE interview process can vary, but typically it takes about less than 2 weeks to complete.
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based on 36 interview experiences
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Amazon SDE Reviews and Ratings
based on 26 reviews
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