Design Twitter Feed

1. Problem Statement

2. Architecture Discussion Map

Use this as one discussion aid, not a single correct answer. Your design should follow from the requirements, scale, and trade-offs you establish.

graph LR
    A["Design Twitter Feed"]
    A --> F1["Fan-out Strategies Push vs Pull vs Hybrid Model"]
    A --> F2["Timeline Generation Precomputed Feeds in an In-Memory Store"]
    A --> F3["Media Path Separation from Publishing"]
    A --> F4["Pagination Strategies Cursor-based vs Offset-based"]
    A --> F5["Audience and age-restriction enforcement"]

3. Key Focus Areas

• 1
  Fan-out Strategies (Push vs Pull vs Hybrid Model)
• 2
  Timeline Generation (Precomputed Feeds in an In-Memory Store)
• 3
  Media Path Separation from Publishing
• 4
  Pagination Strategies (Cursor-based vs Offset-based)
• 5
  Audience and age-restriction enforcement

4. What the Interviewer Looks For

The interviewer probes these areas, and the report grades the interview against them.

• Requirements and capacity
• Fan-out strategy and celebrity handling
• Timeline storage, read path, and pagination
• Write path and data model
• Visibility, consistency, and resilience