Is this a video course?

No. This is an interactive, slide-based learning platform. Each lesson has rich text, animated diagrams, live code editors, and quizzes. You learn by reading, interacting, and doing, not by watching videos passively.

How long do I have access?

Forever. Both pricing tiers are one-time payments with lifetime access. This includes all current 766 lessons and any future content we add.

What level of experience do I need?

None. We start from absolute basics like 'What is latency?' and build up to distributed consensus protocols. The Foundation level assumes zero prior knowledge of system design.

How much does the system design course cost?

7.99 US dollars for lifetime access globally, or 499 Indian rupees for lifetime access in India. One-time payment, no subscription, no hidden fees. 11 lessons are free with no signup required.

What technologies are covered?

Everything from DNS and load balancers to Kubernetes, Kafka, distributed databases, consensus protocols, stream processing, security architecture, and observability. We cover principles and real-world implementations used at Netflix, Google, Amazon, Uber, Stripe, and more.

Is this useful for system design interview preparation?

Yes. The lessons are structured around the exact topics asked in system design interviews at FAANG and top-tier companies. Interactive diagrams help you practice whiteboard-style explanations. Covers everything from URL shortener design to distributed payment systems.

How is this different from ByteByteGo or Educative?

766 interactive lessons (4x more than most competitors), 16 different diagram types that build step by step, real production examples from Netflix, Google, Amazon, Uber, and Stripe, and lifetime access for a one-time payment of $7.99 instead of annual subscriptions costing 100 to 200 dollars per year.

A mobile app needs user data, team data, and recent posts to render a profile page. What is the most efficient approach?

Use a single endpoint that bundles user, team, and posts data in one response, A single bundled response eliminates 2 round trips. On a mobile network with 200ms latency, this saves 400ms, a significant improvement in perceived performance. The server can fetch user, team, and posts in parallel internally.

What is the DataLoader pattern?

A server-side utility that collects individual data requests within a tick and batches them into a single database query, DataLoader (created by Facebook) collects multiple individual data fetch requests that happen during a single event loop tick and batches them into one query. Instead of 50 individual SELECT queries, it runs one SELECT ... WHERE id IN (...) with all 50 IDs.

Netflix's BFF for the TV app aggregates data from 40 microservices. What technique do they use when one downstream service is slow?

Drop the slow source from the response after a per-source timeout and ship what is ready, Per-source timeouts protect the overall response time. If one of 40 data sources exceeds the timeout (e.g. 300ms), the BFF drops it and returns the other 39. A partial response delivered in 200ms is better than a complete response delivered in 1.2 seconds.

Response Batching

Name: System Design Masterclass
Availability: InStock

in Api Design Protocols

This lesson is part of the full System Design Masterclass. Unlock it along with 765 other lessons for a one-time payment.

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