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.

What is the main limitation of the request-response pattern?

The caller is blocked until the response arrives, creating temporal and synchronous coupling, Request-response creates synchronous coupling (the caller waits) and temporal coupling (both parties must be available simultaneously). When the responder is slow or down, the caller is stuck.

A user uploads a video that needs 5 minutes of transcoding. Should the upload API use request-response for the transcoding step?

No, accept the upload synchronously, queue the transcoding, and notify the user when it is done, Long-running operations should never block the HTTP request. Accept the upload, return a 202 Accepted with a job ID, queue the transcoding asynchronously, and let the client poll for status or receive a webhook notification when the work is done.

Service A calls Service B, which calls Service C synchronously. Service C takes 500ms to respond. What happens to Service A?

Service A is blocked for at least 500ms because the latency compounds through the synchronous call chain, In a synchronous call chain, latency compounds. Service B is blocked waiting for Service C (500ms). Service A is blocked waiting for Service B (500ms plus B's own processing time). This cascading wait is why deep synchronous call chains are dangerous at scale.

Request-Response Pattern

Name: System Design Masterclass
Availability: InStock

in Messaging Event Systems

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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