Amazon Applications Engineer Interview Questions and Answers

Q1. Check if array is monotonous
Ans. 
Check if array of strings is monotonous
• Iterate through the array and compare each string with the next one to check for monotonicity

• If all strings are in increasing or decreasing order, the array is monotonous

• Examples: ['apple', 'banana', 'cherry'] is monotonous, ['orange', 'kiwi', 'apple'] is not
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Q1. Group Anagrams Leetcode question
Ans. 
Group Anagrams: Given an array of strings, group the anagrams together.
• An anagram is a word formed by rearranging the letters of another word. Example: 'eat' and 'tea'.

• To group anagrams, sort each string and use the sorted string as a key in a dictionary.

• Example input: ['eat', 'tea', 'tan', 'ate', 'nat', 'bat']. Output: [['eat', 'tea', 'ate'], ['tan', 'nat'], ['bat']].

• The time complexity is O(NK log K), where N is the ...read more
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Q1. Explain your previous experience
Ans. 
I have 5 years of experience as an Applications Engineer in the automotive industry.
• Designed and implemented software solutions for vehicle diagnostics

• Collaborated with cross-functional teams to troubleshoot and resolve technical issues

• Provided technical support to customers and conducted product demonstrations

• Developed training materials and conducted training sessions for internal teams

• Contributed to product developm...read more
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There will be 5 rounds

All the round were mainly focused on the leadership priciples and technical skills
Each round will be carried for 1hr
You should be proefficeint with AWS and devops concepts like CI/CD

This round consist of 2 question mainly focused on DSA concepts like Array and Strings

Here also you will be asked to solve 2 DSA questions form medium to hard level

Q1. Your work-experience and projects
Ans. 
I have extensive experience in applications engineering, focusing on software development and project management across various industries.
• Worked on a cross-functional team to develop a cloud-based application that improved data accessibility for clients.

• Led a project to integrate machine learning algorithms into existing software, resulting in a 30% increase in processing efficiency.

• Collaborated with clients to gather...read more
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Q2. Questions based on your project , mainly to check the leaderships principles
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Dynamic Programming, Greedy Algorithm

Q1. Total 3 round was there First 2 questions from the data structure and algorithm and third round was design
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Q2. Reverse the linked list
Ans. 
Reverse a linked list
• Create three pointers: current, prev, and next

• Iterate through the linked list, updating pointers accordingly

• Set the head of the linked list to the new tail
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Q3. Diameter of binary tree
Ans. 
The diameter of a binary tree is the number of nodes on the longest path between two leaves in the tree.
• The diameter of a binary tree can be calculated by finding the height of the left subtree, the height of the right subtree, and adding them together.

• The diameter may or may not pass through the root of the tree.

• Example: For the binary tree below, the diameter is 4 (nodes 1, 2, 4, 7).

• 1

• / \

• 2 3

• / \

• ...read more
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