Amazon Software Development Engineer Interview Questions and Answers

Ds and Algo, tree, array String

DS Algo, Tree Array grapH String

Q1. Behavioural questions
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Q1. 1 on DS Algo LC medium
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Q2. Behavioural questions
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1hr with two DSA questions, one is printing nth row of pascal triangle,
other I donot remember

Q1. Diagonal traversal of a binary tree
Ans. 
Diagonal traversal of a binary tree involves printing the nodes of the tree in a diagonal pattern.
• Start with the root node and move to its right child, then move down to its left child.

• Repeat this process for each diagonal of the tree, printing the nodes as you traverse.

• Use a queue to keep track of the nodes at each level of the tree.
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Q2. I donot remember
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Q1. Merge point of two inked lists which will be same from a node. (Linked List)
Ans. 
Find the merge point of two linked lists.
• Traverse both linked lists to find their lengths.

• Calculate the difference in lengths and move the pointer of the longer list by the difference.

• Traverse both lists in parallel until the merge point is found.
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Q2. Next greater element (Stack)
Ans. 
The Next Greater Element problem involves finding the next greater element for each element in an array.
• Use a stack to keep track of elements for which the next greater element is yet to be found.

• Iterate through the array and for each element, pop elements from the stack until a greater element is found.

• Store the next greater element for each element in a result array.
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Q1. Solve soduko puzzle(I have used backtracking)
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DSA and SQL leetcode questions

Q1. Explain the coding questions that you have solved
Ans. 
I have solved various coding questions, focusing on algorithms, data structures, and problem-solving techniques.
• Implemented sorting algorithms like QuickSort and MergeSort to understand time complexity.

• Solved problems on LeetCode, such as 'Two Sum' and 'Longest Substring Without Repeating Characters'.

• Worked on dynamic programming challenges, including the 'Knapsack Problem' and 'Fibonacci Sequence'.

• Developed solutions ...read more
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Standard DS/Algo involving mostly trees and leadership principles

Q1. System Design Hotel
Ans. 
Design a hotel management system to handle bookings, check-ins, and customer services efficiently.
• User authentication: Allow users to create accounts and log in to manage bookings.

• Room management: Track room availability, types, and pricing (e.g., single, double, suite).

• Booking system: Implement a calendar for checking availability and making reservations.

• Payment processing: Integrate secure payment gateways for online...read more
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Q2. Behavrioal questions
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Hackerrank 2 questions followed by leadership principle questions

Q1. Leadership principle questions with account managers
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Q2. Leetcode questions with SDE
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Q1. Tell me about a time when you had conflict with your seniors at work and how you handled it
Ans. 
Handled conflict with seniors by discussing concerns openly and finding common ground
• Approached senior calmly and respectfully to discuss concerns

• Listened to their perspective and tried to understand their point of view

• Suggested potential solutions or compromises to resolve the conflict

• Worked together to find common ground and move forward professionally
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