How do I approach System Design interview questions?

System Design questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master system design interviews.

What difficulty level is this interview question?

This is a easy difficulty System Design question, commonly asked during Technical Screen rounds at Mercor.

What role is this question designed for?

This question is commonly asked for Machine Learning Engineer candidates at Mercor during technical interviews.

Design a Social Feed

Last updated: Jul 14, 2026

Quick Overview

Design a personalized social feed that balances fresh and ranked content while supporting posts, follows, deletions, privacy, and stable pagination. The discussion covers hybrid fanout, celebrity accounts, candidate generation, ranking, hydration, and read-heavy scaling trade-offs.

|Home/System Design/Mercor

Design a Social Feed

Mercor

May 30, 2026, 12:00 AM

easyMachine Learning EngineerTechnical ScreenSystem Design

Submit Your Answer to Earn 20XP

Loading comments...

Browse More Questions

More System Design•More Mercor•More Machine Learning Engineer•Mercor Machine Learning Engineer•Mercor System Design•Machine Learning Engineer System Design

Your design canvas — auto-saved

Design a Social Feed

Last updated: Jul 14, 2026

Quick Overview

|Home/System Design/Mercor

Design a Social Feed

Mercor

May 30, 2026, 12:00 AM

easyMachine Learning EngineerTechnical ScreenSystem Design

Submit Your Answer to Earn 20XP

Loading comments...

Browse More Questions

More System Design•More Mercor•More Machine Learning Engineer•Mercor Machine Learning Engineer•Mercor System Design•Machine Learning Engineer System Design

Your design canvas — auto-saved