Quanby Tech Full Stack Engineer Interview Questions and Answers

Q1. They ask me to write a code. What is normalization What is Generics
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Round duration - 90 minutes
Round difficulty - Medium

It was a mcq+coding round. There were 2 coding questions of medium difficulty. It was around 3 P.M.

Q1. Count with K different characters
You are given a string ‘STR’ of lowercase alphabets and an integer K. Your task is to count all the possible substrings that are not necessarily distinct but should have e...read more
Ans. Brute Force
 The idea is to check for all the substrings of the given string and then check for each substring whether it contains exactly K different characters or not.
 
• Declare COUNT = 0 for storing the answer.
• Run two nested loops for generating the indices of all the substrings of the string say i and j (i starting from 0 and j starting from i).
  • Take the substring from index i to j.
  • Check for the characters in...read more
Answered by CodingNinjas
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Q2. Collect Maximum Coins in Matrix
You are given a matrix of ‘M’ rows and ‘N’ columns. The cells of the matrix contain either a coin or are empty.
You are allowed to visit every boundary cell that has a coi...read more
Ans. Depth First Search
Iterate all the boundary cells and apply depth-first search from the boundary cells that contain a coin so that we can collect all the adjacent coins that don’t lie on the boundary. To apply depth-first search without using extra memory mark the cells that you have already visited as 0 (contains zero coins now) in the original matrix, this way you won’t have to maintain an extra matrix to store the vi...read more
Answered by CodingNinjas
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Round duration - 90 minutes
Round difficulty - Hard

It was held after the debugging round at around 1 PM. The interviewer briefed me about the problem and then asked me to code in visual studio code.

Q1. Optimize Memory Usage
Alex has a computer with ‘K’ memory spaces. He has a list of ‘N’ different document downloads that he would like to do, each of which consumes some unique memory usage. He also has ‘M...read more
Ans. Brute Force
Firstly, we will check all the possible pairs exhaustively to find out the maximum permitted memory usage. Then, we will insert all optimal pairs into an array and return it.

 
The steps are as follows:
• Initialize max_usage as the largest number less than or equal to ‘K’ from either ‘game’ or ‘ download’ array. This is to check the corner case where only a game or download is chosen.
• Then we run a loop ‘i’ ...read more
Answered by CodingNinjas
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Round duration - 45 minutes
Round difficulty - Hard

It was immediately after the second interview round. Total 6 students were shortlisted from various colleges for this round. It was at around 4 PM. There were 2 interviewers and asked questions from OS, DBMS, DS and project related questions from resume.

Q1. Technical Questions
What is segmentation?
What is paging?
All the concepts of paging.
What is size of session cookie?
Difference between TCP and UDP.
Explain OSI model.
Different layers of OSI model.
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