HardDesign: News Feed (Facebook/Twitter)

Why is cursor-based pagination preferred over offset-based for news feeds?

— Tests your understanding of this concept.

Answer Options

ACursors are faster to implement
BOffset pagination becomes unstable when new items are inserted at the top
CCursors support bidirectional scrolling
DOffset requires more database storage

Want to see the correct answer?

Get the answer with a detailed explanation, plus practice 22+ more Design: News Feed (Facebook/Twitter) questions with adaptive quizzes and timed interviews.

See the Answer on Guru Sishya →

This question is from the Design: News Feed (Facebook/Twitter) topic (System Design Cases).

Learn Design: News Feed (Facebook/Twitter)→Browse All Questions

More Design: News Feed (Facebook/Twitter) Questions

What is 'fan-out on write' in the context of a news feed?

Hard

A celebrity has 50 million followers and posts 10 times per day. Fan-out on write generates how many feed updates per day?

Hard

A user follows both Taylor Swift (50M followers) and a friend (100 followers). How do you merge their posts into one ranked feed?

Hard

What data structure in Redis is best for storing a user's feed (ordered list of post IDs)?

Hard

Your Kafka fan-out workers fall behind during a viral event. Followers see the post 10 minutes late. How do you handle this?

Hard