Chaayos Software Developer Interview Questions and Answers

• Q1. Software development lifecycle
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• Q2. App security & deployment in play store
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• Q1. Merge sort algorithm and divide array in the chunks
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Coding Questions and SQL

• Q1. Topics : Trees and LinkedList
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• Q1. Trees, LinkedList and SQL queries
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3 coding questions and platform was hackerrank

• Q1. Two medium graph questions from leetcode
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3 coding questions and platform was hackerrank

• Q1. Some medium Graph problems from leetcode
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• Q1. Dictionary Sort , DFS, BFS
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• Q1. Reverse a LinkedList from m to n
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Round duration - 90 Minutes
Round difficulty - Easy

This round was conducted on the HackerEarth platform. It had 2 sections and candidates were given a time of 1 hour 30 minutes. 

Programming MCQs — 18 MCQs (each of 2 marks)
Questions were a little tricky. it tested upon one’s programming fundamentals. It had C/C++ output questions, pseudocode questions, Operating systems, and SQL queries.
Coding — 2 ( one contains 75 marks and the other contains 100 marks )

Our scores of the first 2 sections weren’t revealed. My MCQs went really well. I solved 2 coding questions in the coding section. Only 15 students got selected for the interview round, and I was one of them.

• Q1. Count Ways To Travel Triangular Pyramid Bob has been given a triangular pyramid with its vertices marked as ‘O’, ‘X’, ‘Y’ and ‘Z’ and provided with another inte...read more
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• Q2. Maximum Profit Mukesh is a hard worker and has a good running business. He has a list of profits he made in the last ‘N’ days. Mukesh wants to know what maximum...read more
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Round duration - 60 Minutes
Round difficulty - Medium

This round was scheduled for 1 hour and the panel had 1 interviewer. Being a virtual interview, the first challenge that I faced was that the interviewer was not audible. I suggest you not panic in such a situation and use the chatbox feature (or contact HR if need be) to figure out something that works for you and the panel. We later connected over voice call (over the phone) with our videos ON (over a laptop) and continued with the interview.

The interview was very calm and helpful. I was able to solve all questions and I explained different approaches to solve the questions. Once he was convinced of my solution, he asked me to write the code on my own IDE.

• Q1. Running Median You are given a stream of 'N' integers. For every 'i-th' integer added to the running list of integers, print the resulting media...read more
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• Q2. Boundary Traversal You have been given a binary tree of integers. Your task is to print the boundary nodes of this binary tree in Anti-Clockwise direction start...read more
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• Q3. Number Of Pairs With Given Sum You have been given an integer array/list(arr) and a number 'Sum'. Find and return the total number of pairs in the array...read more
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Round duration - 90 Minutes
Round difficulty - Medium

This was a technical + HR round. First, he asked me to introduce myself. This round was also based on your knowledge of DSA. I was asked 2 coding questions. Then he asked a couple of questions from OS and DBMS which were pretty easy. At last, we ended the interview on a good note. Then he asked me questions about myself.
Why I want to join OYO rooms. 
What are my hobbies?
Goals in the next five years.

• Q1. Zig-Zag String You are given a string ‘STR’ of size ‘N’ and an integer ‘M’ (the number of rows in the zig-zag pattern of ‘STR’). Your task is to return the stri...read more
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• Q2. Ways To Make Coin Change You are given an infinite supply of coins of each of denominations D = {D0, D1, D2, D3, ...... Dn-1}. You need to figure out the total ...read more
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• Q1. Operating system questions
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Linked list standard questions