Questions that have appeared at tiktok for an engineering (Case Study) interview.

1. System Design

Question: How would you design a feature for TikTok that allows users to find and follow other users with similar content interests?

Question: If TikTok wanted to implement a live streaming feature, what would be the key considerations and how would you approach the design?

Question: Suppose you are asked to design a system to handle TikTok's video uploading service. What factors would you consider to ensure the system is robust, scalable, and efficient?

2. Data Storage and Retrieval

Question: How would you design a database schema to efficiently store and retrieve TikTok's user-generated content?

Question: Can you discuss a strategy for storing and retrieving the massive amount of user interaction data (likes, shares, comments) on TikTok?

Question: TikTok needs to store and retrieve personalized user feeds effectively. How would you design such a system?

3. Performance Optimization

Question: How would you tackle the challenge of optimizing video loading speed on TikTok to improve user experience?

Question: What strategies would you propose to ensure optimal performance of the TikTok app during peak usage times?

Question: How would you approach the problem of optimizing real-time data processing for TikTok's recommendation system?

4. Security and Privacy

Question: How would you design a secure system to protect TikTok users' personal data?

Question: What considerations would you take into account when designing a feature for users to report inappropriate content on TikTok?

Question: How would you ensure the privacy of users' direct messages on TikTok while still allowing for necessary moderation?