TikTok Senior Software Engineer Interview Questions and Answers

Q1. Basic questions about your CV
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Live coding on any platform - DSA round

Q1. DSA round - whiteboarding
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45 min round. Similar to Leetcode medium level question.

45 min coding round, 2 question asked

Q1. System design of proximity service
Ans. 
Design a system for proximity service
• Utilize geolocation data to track user locations

• Implement algorithms to calculate proximity between users

• Use real-time updates to notify users of nearby contacts
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Q1. Behavioral questions
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Q1. Minimum Knight Moves (LC Medium)
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Q2. OS, CN, DB concepts like multithreading, semaphore, tcp vs udp, transaction and ACId properties. Java concepts like stack vs heap(memory), error vs exception. Any 1 Project discussion for 10 mins
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Q1. Minimum cut problem
Ans. 
Minimum cut problem involves finding the minimum number of edges that must be removed to disconnect a graph.
• The minimum cut problem is typically solved using algorithms like Karger's algorithm or Ford-Fulkerson algorithm.

• The result of the minimum cut problem is a partition of the graph into two sets of vertices.

• The minimum cut problem is often used in network flow optimization and graph theory.

• Example: In a network of ...read more
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Q2. Binary search tree
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Longest increasing subsequence sum problem

Basic stack and array questions

Q1. Design question on creating a funnel for referral approvals in company
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Q2. Which DB is the best choice
Ans. 
There is no one-size-fits-all answer to which DB is the best choice, as it depends on the specific requirements of the project.
• Consider the type of data being stored (structured, unstructured, etc.)

• Evaluate the scalability and performance needs of the project

• Take into account the budget and resources available for maintenance and support

• Look at the existing technology stack and compatibility with other systems

• Consider ...read more
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Q1. Creating feed of fb with ads integrated
Ans. 
Integrate ads into Facebook feed for monetization
• Utilize Facebook Audience Network for ad integration

• Implement native ads for seamless user experience

• Use targeting options to display relevant ads to users
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DSA Problems from leetcode

Q1. Basics about Android and iOS
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It was a DSA ALGO Medium round

Q1. Design an analytics system
Ans. 
Designing an analytics system for data analysis and visualization
• Define the goals and objectives of the analytics system

• Identify the data sources and types of data to be collected

• Choose appropriate tools and technologies for data processing and analysis

• Design a data model and architecture for storing and accessing data

• Implement data visualization techniques for presenting insights to users
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Q1. General HR questions about salary, workstyle, motivation etc
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