Uplers Software Engineer III Interview Questions and Answers

Asked two 2 pointer based questions

Asked lru cache system design question

Q1. Maximum Length of increasing subsequence
Ans. 
Find the maximum length of increasing subsequence in an array of strings.
• Use dynamic programming to keep track of the length of increasing subsequences ending at each index.

• Iterate through the array and update the length of increasing subsequences.

• Return the maximum length found.
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Q2. LLD for a storage based system
Ans. 
LLD for a storage based system involves designing the detailed architecture and components of the system to efficiently store and retrieve data.
• Identify the requirements for the storage system, including data types, volume, access patterns, and performance expectations.

• Design the data storage architecture, including data structures, indexing mechanisms, and storage technologies like databases or file systems.

• Define the...read more
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Q3. Hashmap based question
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Q1. LLD for a S3 or a storage based system
Ans. 
LLD for a S3 or a storage based system involves designing the detailed architecture and components of the system.
• Define the data model including objects, metadata, and storage classes

• Design the system components like storage nodes, metadata servers, and access control mechanisms

• Consider scalability, fault tolerance, and data consistency in the design

• Implement features like versioning, encryption, and access control pol...read more
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Coding , mainly random DSA question from Leetcode. (Medium difficulty)

System Design , Building a working comment-box of FB/Twitter.

Random questions on JS,CSS and HTML. A bit of coding on string/array .

Discussion on Permorance, Optimisation and Scalability

Bar Raiser, Build React parser to build the JSX using a json of elements and their props.

Q1. A behavioural round, past projects, challenges, optimisation etc.
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Q1. Testcase enumeration
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Q2. Coding question based on an array traversal
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Online assessment test

Q1. Test strategy and test plan, scenario based questions
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Q2. Conding round leetcode easy/medium level questions
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Q1. Basic programming
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Q1. Selenium and test case related question
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Coding from basics, practice leetcode

Q1. How would you test an appilication
Ans. 
To test an application, I would follow a systematic approach to ensure all functionalities work as expected.
• Create test cases based on requirements and user stories

• Perform functional testing to check if all features work correctly

• Conduct regression testing to ensure new changes do not affect existing functionalities

• Test for performance, security, and usability

• Use automation tools like Selenium for repetitive tests
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Q2. How would you test an api
Ans. 
To test an API, I would focus on functionality, performance, security, and integration.
• Create test cases to cover all API endpoints and methods

• Test input validation and error handling

• Check response times and performance under different loads

• Verify security measures such as authentication and authorization

• Integrate API testing with automation tools like Postman or Selenium
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Aptitude was hosted by Amazon themselves comprising of 3 sections:
1. Coding
2. MCQ regarding QA methodologies
3. Behavioural questions (where does your alignment lies)

Q1. Simple string manipulation (e.g. anagram string)
Ans. 
Check if two strings are anagrams of each other
• Create a function that takes in two strings as input

• Remove all spaces and special characters from both strings

• Sort the characters in both strings and compare them to check if they are equal
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Q2. Optimise approach for each question
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Q1. Technical questions around automation suite
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Q1. More questions on the projects I have worked, questions around them
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Q1. Alignment on where you are likely going to be in the org
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Q2. Preferred work location
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Asked about simple array question

Asked DSA, related to hashmap

Q1. Binary search algo
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