List the key functional requirements for the system (Ask the AI for hints if stuck)...
create short url from long
redirect from short url
delete the short url from db
List the key non-functional requirements (performance, scalability, reliability, etc.)...
availability
low latency
high scalability
Estimate the scale of the system. Consider daily active users, read/write ratio, storage requirements, bandwidth, and any relevant QPS calculations...
Define the APIs expected from the system. This is your chance to analyze and define the read and write paths so that you can come up with the high-level design...
Describe the overall system architecture. Identify the main components needed to solve the problem end-to-end. Use the diagramming tool to create a block diagram.
Define the data model. Identify the main entities, their attributes, and relationships. Consider the choice of database type (SQL vs NoSQL) and justify your decision based on access patterns...
Deep dive into 2-3 key components. Explain how they work, how they scale, discuss tradeoffs, capacity, and any relevant algorithms or data structures.