Spinny Interview Questions and Answers

HackerRank Test
1 hour test
Leetcode easy - medium questions

Q1. Q1 - Leetcode : 1577. Number of ways where the square of numbers is equal to the product of 2 numbers Q2- Leetcode medium-level question based on arrays
Ans. 
Backend Developer interview question on Leetcode problems related to arrays and number manipulation.
• Q1: Find number of ways where the square of numbers is equal to the product of 2 numbers

• Q2: Solve a medium-level Leetcode problem based on arrays

• Use appropriate data structures and algorithms to optimize solutions

• Practice problem-solving skills regularly to improve efficiency
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Q1. Design Inventory management system
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An inventory management system is designed to track and manage inventory levels, orders, sales, and deliveries.
• Identify inventory items and categorize them

• Track inventory levels and set reorder points

• Manage orders and sales

• Monitor deliveries and returns

• Integrate with accounting and ERP systems
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Q1. Questions about last project and resume based
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Round duration - 45 minutes
Round difficulty - Easy

This was a coding test with 2 DSA questions.

Q1. 
Merge Two Sorted Arrays Problem Statement
Given two sorted integer arrays ARR1 and ARR2 of size M and N, respectively, merge them into ARR1 as one sorted array. Assume that ARR1 has a size of M + N to hol...read more
Ans. 
Merge two sorted arrays into one sorted array in place.
• Iterate from the end of both arrays and compare elements to merge in place

• Use two pointers to keep track of the current position in each array

• Handle cases where one array is fully merged before the other
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Q2. 
Count Ways to Reach the Nth Stair
Given a number of stairs, starting from the 0th stair, calculate the number of distinct ways you can reach the Nth stair. You can climb either one step or two steps at a ...read more
Ans. 
The question is about calculating the number of distinct ways to reach the Nth stair by climbing one or two steps at a time.
• Use dynamic programming to solve this problem efficiently.

• Define a recursive function to calculate the number of ways to reach each stair.

• Consider base cases for 0 and 1 stairs.

• Use memoization to store intermediate results and avoid redundant calculations.

• Handle large values of N by taking modulo ...read more
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Round duration - 60 minutes
Round difficulty - Medium

This was the first round with questions on DSA and Low Level design.

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. 
Calculate the total amount of rainwater that can be trapped between given elevations in an array.
• Iterate through the array and calculate 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 at each bar to get the total trapped water for the entire array.
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Q2. Can you provide a low-level design of a hotel management system?
Ans. 
A low-level design of a hotel management system involves detailing the system's components and their interactions.
• Define classes for entities like Room, Guest, Reservation, and Staff

• Implement functions for booking rooms, checking availability, and managing guest information

• Include modules for billing, housekeeping, and reporting

• Utilize databases for storing information and APIs for external integrations
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Q1. You must have knowledge about Each and every function, process and problems about the car and engine.
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Q2. You must be able to attend customer and car problem with much possibilities
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Q1. Name Education Roll Current residence Etc
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About strength,about leagl action, about team leader and leadership

Q1. Ask me for define my roll and responsibility
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