Topics: Topological Sort, System Design, Data Modeling, Behavioral Questions
Location: Los Gatos, CA
Interview date: 2025-08-15
Summary
Round 1: Coding
Question: Implement topological sort. The input was in string format, which took me extra time to extract dependencies. There were no follow-up questions.
Round 2: System Design
Question: Design an ads frequency cap system. Unlike a rate limiter, this involves communication with advertisers to set up configurations.
Round 3: Data Modeling
Question: Design a database for advertiser intake, similar to designing an F1 schema. It involved only the most basic entities.
Round 4: Behavioral (BQ)
Question: Two rounds of behavioral questions. Both rounds felt similar, not clearly focused on either culture or deep dives.
Details
Preparation Tips & Key Takeaways
What I Learned
String parsing in coding interviews can be time-consuming; practice efficient parsing techniques.
For system design, understand the nuances of different components and their interactions, especially when dealing with external entities like advertisers.
In data modeling, focus on the core entities and relationships before considering more complex aspects.
Recommended Preparation
Coding Practice
Practice topological sort and similar graph algorithms.
Improve string manipulation skills.
System Design
Study rate limiters and their variations.
Understand different configuration strategies for external interactions.
Data Modeling
Review database schema design principles, especially for high-volume data intake.
Familiarize yourself with F1 schema design.
Behavioral Questions
Prepare STAR stories for common behavioral questions.
Practice discussing past experiences in a structured manner.
Resources I Recommend
LeetCode for coding practice.
System design interview resources (e.g., books, articles).
Database design tutorials.
Common Pitfalls to Avoid
Spending too much time on initial parsing in coding rounds.
Neglecting the interaction with external entities in system design.
Oversimplifying data models by missing key entities.