MindTickle Software Developer Interview Questions, Process, and Tips

Q1. Design LLD for Parking Lot
Ans. 
Design LLD for Parking Lot
• Create classes for ParkingLot, ParkingSpot, Vehicle, etc.

• Implement methods for parking, unparking, checking availability, etc.

• Consider different types of vehicles and parking spots (e.g. regular, handicapped, electric)

• Include features like ticketing system, payment processing, and security measures
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Round duration - 50 minutes
Round difficulty - Medium

First round was a basic javascript problem-solving round. The interviewer judged my grasp on fundamental javascript concepts like objects, closures, polyfills, etc. It was during the afternoon and was conducted on google meet and leetcode playground.
The interviewer was very calm. I was first asked some general questions like why I'm applying for this role and what are the projects I've done.

Q1. 
Search in a Row-wise and Column-wise Sorted Matrix Problem Statement
You are given an N * N matrix of integers where each row and each column is sorted in increasing order. Your task is to find the positi...read more
Ans. 
This question asks to find the position of a target integer in a row-wise and column-wise sorted matrix.
• Iterate through each row and column of the matrix

• Compare the target integer with the current element

• If the target integer is found, return the position as {i, j}

• If the target integer is not found, return {-1, -1}
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Round duration - 40 minutes
Round difficulty - Easy

One DSA Question along with some javascript questions were asked like hoisting, difference between JSX and Javascript etc.

Q1. 
Trapping Rain Water Problem Statement
You are given a long type array/list ARR of size N, representing an elevation map. The value ARR[i] denotes the elevation of the ith bar. Your task is to determine th...read more
Ans. 
The question asks to find the total amount of rainwater that can be trapped in the given elevation map.
• Iterate through the array and find the maximum height on the left and right of each bar.

• Calculate the amount of water that can be trapped at each bar by taking the minimum of the maximum heights on the left and right.

• Sum up the trapped water for all bars and return the total amount.
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Round duration - 45 Minutes
Round difficulty - Easy

It was a DSA round where I was asked 2 coding questions and optimised approaches for both.

Q1. 
Ninja and His Meetings Problem Statement
Ninja has started a new startup with a single conference room available for meetings. Given an array/list MEETINGS of consecutive appointment requests, Ninja must ...read more
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Q2. 
Trapping Rain Water II Problem Statement
Given an M * N matrix where each cell's value represents its height in a 2-D elevation map, calculate the total volume of water that can be trapped after rainfall.
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Round duration - 45 Minutes
Round difficulty - Medium

It was more of discussion around my projects and resume. Also asked some questions related to me. What are your hobbies? Willing to relocate?

Q1. 
Smallest Subarray With K Distinct Elements
Given an array A consisting of N integers, your task is to find the smallest subarray of A that contains exactly K distinct integers.
If multiple such subarrays...read more
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