Amazon Software Development Engineer Interview Questions, Process, and Tips

2 questions based on dynamic programming

Q1. Asked questions based on coding test
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Q2. The time complexity of the code I wrote
Ans. 
The time complexity of the code can be determined by analyzing the number of operations performed as a function of the input size.
• Time complexity is typically expressed using Big O notation, which describes the upper bound on the growth rate of the algorithm.

• Common time complexities include O(1) for constant time, O(log n) for logarithmic time, O(n) for linear time, O(n^2) for quadratic time, and O(n!) for factorial ti...read more
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Q3. Can it be improved? Is there any other way to do it?
Ans. 
Yes, it can be improved by considering alternative approaches or technologies.
• Consider different algorithms or data structures for optimization

• Explore new technologies or frameworks that may offer better performance

• Collaborate with team members to brainstorm alternative solutions

• Conduct code reviews and seek feedback for improvement
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Data Structures for 45 mins on Hackerrank

Q1. Kadane's algorithm
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Kadane's algorithm is used to find the maximum subarray sum in an array of integers.
• Iterate through the array and keep track of the maximum sum ending at each index.

• At each index, choose between extending the previous subarray or starting a new subarray.

• The final result is the maximum sum found during the iteration.
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Q2. Dynamic programming
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2 questions medium difficulty

Q1. Talked about trees, and my projects, two questions from algo writing also taking about time complexity
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Q2. Why did you use jsp servlets
Ans. 
JSP servlets were used for dynamic web page generation and server-side processing.
• Used for creating dynamic web pages by embedding Java code in HTML

• Facilitates server-side processing of user requests

• Enables separation of presentation and business logic

• Provides scalability and reusability of code

• Example: Used JSP servlets to generate personalized user profiles on a website
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Some medium level leetcode questions

Some general behavioural questions

Q1. Technical questions and approach explanation of coding round
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OA is tough clear it Practice DSA

Coding is super hard solve leetcode

Q1. Reverse a linked-list
Ans. 
Reverse a linked-list
• Iterate through the linked-list and change the direction of the pointers

• Keep track of the previous, current and next nodes

• Set the head of the linked-list to the last node after reversing
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Q2. Backtracking and Dynamic Programming Questions
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Q3. DBMS QUERIES third maximum salary
Ans. 
To find third maximum salary in DBMS, we can use the ORDER BY and LIMIT clauses.
• Use ORDER BY to sort the salaries in descending order

• Use LIMIT to select the third highest salary

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 2,1
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