SquadStack Product Engineer Interview Questions, Process, and Tips

Round duration - 15 minutes
Round difficulty - Easy

They called around afternoon to know more about me. It happened over a phone call. Don't lie about anything as they do some screening. Asked reason for change.

Round duration - 150 minutes
Round difficulty - Medium

Asked 5 coding questions on DSA. Total marks were 250. Each question has a different weightage. They give you around a week to complete the round.

Q1. 
Left View of a Binary Tree
Given a binary tree, your task is to print the left view of the tree. The left view of a binary tree contains the nodes visible when the tree is viewed from the left side.
Inpu...read more
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Q2. 
Find Duplicates in an Array
Given an array ARR of size 'N', where each integer is in the range from 0 to N - 1, identify all elements that appear more than once.
Return the duplicate elements in any orde...read more
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Q3. 
Maximum Subarray Sum Problem Statement
Given an array of integers, determine the maximum possible sum of any contiguous subarray within the array.
Example:
Input:
array = [34, -50, 42, 14, -5, 86]
Out...read more
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Q4. 
Longest Common Subsequence Problem Statement
Given two strings STR1 and STR2, determine the length of their longest common subsequence.
A subsequence is a sequence that can be derived from another sequen...read more
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Q5. 
Reverse Words in a String: Problem Statement
You are given a string of length N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...read more
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Round duration - 20 minutes
Round difficulty - Easy

Asks questions about your experience. Gives introduction to the role and what you'll be doing. Ask any questions about the company, culture or job.

Round duration - 120 minutes
Round difficulty - Medium

Q1. How would you design a parking lot system?
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Round duration - 60 minutes
Round difficulty - Easy

Asked technical questions around DBMS and Java.

Q1. What are the ACID properties in database management systems?
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Q2. What is an Inner Join?
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Round duration - 60 minutes
Round difficulty - Easy

2 coding questions were asked in this round. It was easier than the previous online coding round.

Q1. 
Arithmetic Expression Evaluation Problem Statement
You are provided with a string expression consisting of characters '+', '-', '*', '/', '(', ')' and digits '0' to '9', representing an arithmetic express...read more
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Q2. 
Covid Vaccination Distribution Problem
As the Government ramps up vaccination drives to combat the second wave of Covid-19, you are tasked with helping plan an effective vaccination schedule. Your goal is...read more
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Round duration - 60 minutes
Round difficulty - Medium

It was a bar raiser round where they ask system design questions mostly around APIs and Databases.
Asked to create APIs and design tables.

Round duration - 60 minutes
Round difficulty - Easy

Round with one of the founders to see for cultural fit. General questions about you, your journey, reason for change, priorities when looking for a job.

Round duration - 30 minutes
Round difficulty - Easy

The round was a resume walkthrough and one question related to DS as I mentioned one project related to that.

It happened in the morning. You should walkthrough your resume before going for this round.

Q1. Can you explain how you handled scalability in the project mentioned in your resume?
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Round duration - 60 minutes
Round difficulty - Medium

Round contained 1 DSA question

Q1. 
Factorial of a Number Problem Statement
You are provided with an integer 'N'. Your task is to calculate and print the factorial of 'N'. The factorial of a number 'N', denoted as N!, is the product of all ...read more
Ans. 
Tip 1 : ease walkthrough the recursion tree that you are trying to think in your mind for this problem
 
Answered Anonymously
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Round duration - 60 minutes
Round difficulty - Easy

A problem based on data and I had to find some interference from the same

Round duration - 60 minutes
Round difficulty - Easy

This was a culture fit round based on questions like why do you want to join a startup?
What do you expect working in a startup and how would you solve a challenge you are facing.
The career path that you are aiming