Sequoia Group Interview Questions and Answers

Q1. Triplets with given sum
Ans. 
Find all unique triplets in an array that sum up to a given target value.
• Sort the array first to easily identify duplicates.

• Use two pointers approach to find the triplets.

• Skip duplicates to avoid duplicate triplets.

• Example: Given array [1, 2, 3, 4, 5] and target sum 8, output should be ['1, 3, 4'].
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Q2. Basic Tree Question
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Q1. Design a like and comments system
Ans. 
Design a like and comments system for a social media platform
• Use a relational database to store user likes and comments

• Implement a feature to allow users to like posts and comments

• Include a feature to display the number of likes and comments on each post

• Allow users to comment on posts and reply to comments

• Implement a notification system for users to be notified of new likes and comments on their posts
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Q2. Basic design question
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Q1. This round was with CTO - It had basic questions regarding my previous job
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Coding questions related to oops, dbms, predicting the output, time complexity and etc

Q1. Bubble sort using recursion
Ans. 
Bubble sort using recursion is a sorting algorithm that repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order.
• Define a recursive function that takes an array of strings as input

• Base case: if the array length is 1, return the array

• Recursive case: compare adjacent elements and swap if necessary, then recursively call the function with the updated array

• Repeat the proc...read more
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Q2. Reversing strings using different methods
Ans. 
Different methods to reverse strings in an array
• Use built-in functions like reverse() in JavaScript

• Iterate through each string and reverse characters manually

• Use recursion to reverse each string
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Q1. Questions related to testing
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Q2. Logical questions which are related to testing
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Q1. It was a hood discussion basic tableau and SQL questions were asked
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Q1. More focused on logical thinking and how to model data and analyse.
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Q1. And this round was taken by so called CTO of the organisation. I must say he is not eligible for this position. He is a CTO and sounded non technical more. The questions asked by him were very silly. Que...read more
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Q2. Asked about tools i used where he literally have no idea.
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Was asked to reverse linked list k elements at a time. It was ok to use an editor.

Q1. Asked about the challenges you faced. Interviewer did not have the patience and ended the interview 10 mins earlier.
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