Freshworks Senior Software Developer Interview Questions, Process, and Tips

Round duration - 90 Minutes
Round difficulty - Easy

In this round, I was asked about my role, tools, and tech stacks used in my current company. I was also asked 1 coding question and 1 system design question

Q1. 
Intersection of Linked List Problem
You are provided with two singly linked lists containing integers, where both lists converge at some node belonging to a third linked list.
Your task is to determine t...read more
Ans. 
Find the node where two linked lists merge, return -1 if no merging occurs.
• Traverse both lists to find the lengths and the last nodes

• Align the starting points of the lists by adjusting the pointers

• Traverse again to find the merging node or return -1 if no merging occurs
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Q2. Can you discuss the low-level design (LLD) of a system similar to Flipkart?
Ans. 
Discussing the low-level design of a system similar to Flipkart
• Divide the system into modules like user authentication, product catalog, shopping cart, payment gateway

• Discuss the data flow between these modules and how they interact with each other

• Explain the database schema design for storing user information, product details, and order history

• Consider scalability and performance optimizations like caching, load balan...read more
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Round duration - 120 minutes
Round difficulty - Medium

3 coding questions were asked

Q1. 
Middle of Linked List Problem Statement
Given the head node of a singly linked list, return a pointer pointing to the middle node of the linked list. In case the count of elements is even, return the node...read more
Ans. 
Return the middle node of a singly linked list, or the second middle node if count is even.
• Traverse the linked list with two pointers, one moving twice as fast as the other

• When the fast pointer reaches the end, the slow pointer will be at the middle

• If count is even, return the second middle node

• Handle edge cases like single node or no midpoint
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Q2. 
Cube Sum Pairs Problem Statement
Given a positive integer N, find the number of ways to express N as a sum of cubes of two integers, A and B, such that:
N = A^3 + B^3
Ensure you adhere to the following c...read more
Ans. 
The problem involves finding the number of ways to express a given integer as a sum of cubes of two integers.
• Iterate through all possible values of A and B within the given constraints.

• Check if A^3 + B^3 equals the given integer N.

• Count the valid pairs of A and B that satisfy the condition.

• Return the count of valid pairs for each test case.
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Q3. 
Overlapping Intervals Problem Statement
You are given the start and end times of 'N' intervals. Write a function to determine if any two intervals overlap.
Note:
If an interval ends at time T and anothe...read more
Ans. 
Determine if any two intervals overlap based on start and end times.
• Iterate through intervals and check for any overlapping intervals by comparing start and end times.

• Sort the intervals based on start times to optimize the solution.

• Consider edge cases where intervals end and start at the same time but are not considered overlapping.
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Round duration - 90 Minutes
Round difficulty - Easy

This was mostly system design round and some os questions were asked

Q1. How would you design an app like Uber?
Ans. 
Designing an app like Uber involves creating a platform for connecting riders with drivers for on-demand transportation services.
• Develop a user-friendly interface for riders to request rides and for drivers to accept requests.

• Implement a real-time tracking system to show the location of drivers and estimated arrival times.

• Incorporate a payment system for seamless transactions between riders and drivers.

• Include a rating...read more
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Q2. What is threading, and what are the different scheduling algorithms?
Ans. 
Threading is a way for a program to execute multiple tasks concurrently. Different scheduling algorithms determine the order in which threads are executed.
• Threading allows multiple tasks to run concurrently within a single process.

• Scheduling algorithms determine the order in which threads are executed, such as First-Come-First-Served (FCFS), Round Robin, Priority-Based Scheduling, etc.

• FCFS schedules threads based on th...read more
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