Let’s design WhatsApp, a messaging platform with billions of users and daily message exchanges. We’ll cover requirements, resource estimation, and the high-level architecture ensuring scalability, security, and low latency. Finally, we’ll evaluate the system and highlight trade-offs between consistency, availability, and performance.
Introduction It’s a frontend application functionality, Once user start typing in a search field of a e-commerce, social media app for user search or a simple search app like google, bing. Key Requirements: Typeahead Design problem Problem related to this topic might be asked as : Functional Requirements Non-functional requirements Resource Estimation We need to
Two students try to collaborate on a report by sending drafts back and forth, but they quickly realize this approach is disorganized and inefficient. Online collaborative document editing services like Google Docs solve the inefficiency of back-and-forth sharing by enabling real-time editing, reviewing, and commenting. They require no special hardware, allow access from anywhere, provide
Problem statement For example, when content is uploaded to social media platforms like YouTube, Instagram, or Twitter, it can receive millions of likes, views, or retweets within just a few seconds, minutes, or hours. To handle this, counters must be updated efficiently. A simple approach is to lock a row while persisting the data and
What is Quora ? Quora is a social Q&A platform where users can ask and answer questions. Unlike search engines that give quick but shallow results, Quora offers more conversational, in-depth insights, often from domain experts who share their expertise. Requirements of Quora’s Design Functional Requirement Non Functional Requirement Resource Estimation Building Blocks Initial Design
Functional Requirement User Admin Non Functional Requirement Resource Estimation API HLD DB Choice
