Springworks Interview Questions, Process, and Tips

Round duration - 3 Hours
Round difficulty - Hard

3 Coding questions ( 1 medium graph dfs based question , 2 hard level prefix array question ans 3 was a hard question which I don't remember)

2 Database question ( It mostly includes joining 2-3 tables and then you would be able to solve it)

Q1. 
Number of Islands Problem Statement
You are provided with a 2-dimensional matrix having N rows and M columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...read more
Ans. 
Count the number of islands in a 2D matrix of 1s and 0s.
• Use Depth First Search (DFS) or Breadth First Search (BFS) to traverse the matrix and identify connected groups of 1s.

• Maintain a visited array to keep track of visited cells to avoid counting the same island multiple times.

• Increment the island count each time a new island is encountered during traversal.

• Consider edge cases such as when the matrix is empty or when
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Q2. 
Maximum Product Subarray Problem Statement
Given an array of integers, determine the contiguous subarray that produces the maximum product of its elements.
Explanation:
A subarray can be derived from th...read more
Ans. 
Find the contiguous subarray with the maximum product of elements in an array.
• Iterate through the array and keep track of the maximum and minimum product ending at each index.

• Update the maximum product by taking the maximum of current element, current element * previous maximum, and current element * previous minimum.

• Update the minimum product by taking the minimum of current element, current element * previous maximum...read more
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Q3. You were given 3-4 models in a DBMS context. How did you join those models to obtain the desired result?
Ans. 
To join multiple models in a DBMS, use SQL JOIN statements based on common keys.
• Identify common keys between the models

• Use SQL JOIN statements (INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN) to combine the models based on the common keys

• Specify the columns to be selected in the SELECT statement
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Round duration - 30 minutes
Round difficulty - Medium

These rounds depends on the type of interviewer.
My friends were asked questions from DSA but from me they asked a lot of questions on Node.JS and React.

Round duration - 30 Minutes
Round difficulty - Medium

This round depends on your interviewer.
My colleagues were asked questions from DS but my interviewer focused just on javascript.

Round duration - 45 minutes
Round difficulty - Easy

It was a managerial round they will test your communication and how well do you handle situations in your life

Q1. What is one of the most challenging situations you have faced in your life, and how did you handle it?
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Round duration - 90 minutes
Round difficulty - Medium

3 DSA questions, 2 SQL questions
On the DoSelect platform, which was good

Q1. 
Matrix Chain Multiplication Problem
Given 'N' 2-dimensional matrices and an array ARR of length N + 1, where the first N integers denote the number of rows in each matrix and the last integer represents t...read more
Ans. 
The task is to find the minimum number of multiplication operations required to multiply a series of matrices together.
• Use dynamic programming to solve the problem efficiently.

• Create a 2D array to store the minimum number of operations needed to multiply matrices.

• Iterate through different combinations of matrices to find the optimal solution.

• Consider the dimensions of matrices and their compatibility for multiplication...read more
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Q2. 
Linear Probing in Hashing
Hashing is a technique to map large non-negative integers to smaller indices using a hash function. In the context of collision resolution in hash tables, 'Linear Probing' is emp...read more
Ans. 
Linear Probing in Hashing is a technique to resolve collisions in hash tables by linearly searching for the next available slot.
• Implement a function that takes an array of non-negative integers and returns the corresponding hash table using linear probing.

• Use the given hash function H(X) = X mod N to map elements to indices in the hash table.

• Handle collisions by linearly probing for the next available slot in the hash ...read more
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Round duration - 60 minutes
Round difficulty - Easy

Started off with introductions and projects related questions.
Basic javascript and CSS property-related questions.
An easy DSA question

Q1. 
Pair Sum Problem Statement
You are given an array of integers 'ARR' with a length 'N' and a specific integer 'Target'. Your objective is to determine and return all pairs of elements within the array whos...read more
Ans. 
Given an array of integers and a target sum, find pairs of elements that add up to the target.
• Iterate through the array and for each element, check if the complement (target - current element) exists in a hash set.

• If the complement exists, add the pair to the result. If not, add the current element to the hash set.

• Handle edge cases like duplicates and negative numbers appropriately.

• Return pairs in any order as (a, b) o
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Round duration - 45 minutes
Round difficulty - Easy

Introduction and two easy to medium DSA questions

Q1. 
Implementing Queue with Two Stacks
Your task is to implement a queue using two stacks. You are provided with ‘Q’ queries and need to handle them, where each query falls under one of these two operations:
...read more
Ans. 
Implement a queue using two stacks with enqueue and dequeue operations.
• Use two stacks to simulate a queue - one for enqueue and one for dequeue.

• For enqueue operation, push elements onto the enqueue stack.

• For dequeue operation, if dequeue stack is empty, pop all elements from enqueue stack and push onto dequeue stack.

• Return true for successful enqueue and -1 for empty dequeue.

• Example: Enqueue 10, enqueue 20, dequeue (re
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Q2. 
Roman Numeral to Integer Conversion
Convert a string representing a Roman numeral into its integer equivalent and return the result.
Explanation:
Roman numerals are represented by seven different symbol...read more
Ans. 
Convert a Roman numeral string to its integer equivalent.
• Create a mapping of Roman numeral symbols to their integer values.

• Iterate through the input string and add the corresponding integer values.

• Handle cases where a smaller value precedes a larger value (e.g., IV = 4).
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Round duration - 30 minutes
Round difficulty - Easy

This round mainly consisted of some questions on advanced JS topics like Execution Context, Callback queue, Micro task queue, Promises, etc.

Round duration - 60 minutes
Round difficulty - Medium

This round was more technical compared to the previous one. The interviewer was a senior developer. If questions were not answered, answers would be given/explained.

Q1. What are some aggregate operators in MongoDB?
Ans. 
Aggregate operators in MongoDB are used for data aggregation and manipulation.
• Some aggregate operators in MongoDB include $sum, $avg, $min, $max, $push, $addToSet, $first, $last, $project, $match, $group, $sort, $limit, $skip.

• Example: db.collection.aggregate([{$group: {_id: '$field', total: {$sum: '$value'}}}])
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Round duration - 30 minutes
Round difficulty - Easy

This round was mainly to assess my experience level, roles, and responsibilities from my previous company. Salary negotiations also happened here.

Round duration - 180 minutes
Round difficulty - Hard

The test link had 3 days expiry so I could attempt test anytime. It was conducted on doselect.com

Q1. 
Equilibrium Indices in a Sequence
You are given an array/list named 'SEQUENCE', which consists of 'N' integers. The task is to identify all equilibrium indices in this sequence.
Explanation:
An equilibr...read more
Ans. 
The task is to find the equilibrium indices of a given sequence, where the sum of elements at lower indices is equal to the sum of elements at higher indices.
• Iterate through the sequence and calculate the total sum of all elements

• Initialize a left sum and right sum as 0

• For each index, update the left sum and right sum and check if they are equal

• If they are equal, add the index to the equilibrium indices

• Return the equil
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Round duration - 60 minutes
Round difficulty - Medium

Video interview round wherein I was asked to wrote code for the problem statements given by the interviewer. The problems were mainly focused on advanced JS concepts like asynchonous progamming, timers, closures, and data structure problems around arrays, sets, linked list etc.

Q1. 
Rearrange Linked List Problem Statement
Given a singly linked list in the form 'L1' -> 'L2' -> 'L3' -> ... 'Ln', your task is to rearrange the nodes to the form 'L1' -> 'Ln' -> 'L2' -> '...read more
Ans. 
The task is to rearrange the nodes of a singly linked list in a specific order without altering the data of the nodes.
• Iterate through the linked list to find the middle node using the slow and fast pointer technique.

• Reverse the second half of the linked list.

• Merge the first and reversed second half of the linked list alternatively to get the desired order.
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Round duration - 30 minutes
Round difficulty - Easy

This was the last round with HR wherein they judged cultural fit and there was discussion on things like my expectations v/s their expectations etc.

Q1. Tell us something about yourself which is not mentioned in your resume
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Q1. Why do you want to work with springworks
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Round duration - 150 minutes
Round difficulty - Medium

You can give the test any time. Environment was not very well. Questions were not well explained.

Q1. 
Internet Address Problem
You are given the task of reconstructing the address of an Internet resource from a given format.
Explanation:
The address format is: <protocol>://<domain>.ru[/<c...read more
Ans. 
The task is to extract and print the internet resource address from a given string.
• The internet resource address has a specific format: ://.ru[/]

• The can be either 'http' or 'ftp'

• The is a non-empty string of lowercase English letters

• The may or may not be present, and if present, it is a non-empty string of lowercase English letters

• If is not present, the address has either two '/' characters (before the domain) or th
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Q2. 
M-Coloring Problem Statement
Given an undirected graph as an adjacency matrix and an integer M, determine whether you can color the vertices of the graph using at most M colors such that no two adjacent v...read more
Ans. 
The problem is to determine if it is possible to color the vertices of an undirected graph using at most M colors such that no two adjacent vertices have the same color.
• The input consists of the number of test cases, the number of vertices and colors, and the adjacency matrix of the graph.

• For each test case, check if it is possible to assign colors to the vertices such that no adjacent vertices have the same color.

• Use ...read more
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Q3. 
Painting Fences Problem Statement
You are given ‘N’ fences. Your task is to compute the total number of ways to paint these fences using only 2 colors, such that no more than 2 adjacent fences have the sa...read more
Ans. 
The task is to find the total number of ways to paint fences using 2 colors such that at most 2 adjacent fences have the same color.
• Use dynamic programming to solve the problem

• Create a 2D array to store the number of ways to paint the fences

• Initialize the base cases for the first two fences

• Use recurrence relation to calculate the number of ways for the remaining fences

• Return the result modulo 10^9 + 7
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