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 a correlation ID used for in the request-reply pattern?

To match a reply message back to its original request, When multiple requests are in-flight, the client needs to match each reply to its original request. The correlation ID is a unique identifier attached to the request and copied to the reply, enabling this matching.

What advantage does request-reply over queues have over direct HTTP request-response?

Temporal decoupling, the server does not need to be available when the request is sent, The queue acts as a buffer. If the server is down, the request waits in the queue until the server recovers. With direct HTTP, the request would fail immediately. The tradeoff is added latency and complexity.

A client sends 50 concurrent requests via the request-reply pattern. How does it know which reply belongs to which request?

Each request carries a unique correlation ID that the server copies into the reply, The correlation ID is a unique value (typically a UUID) generated by the client for each request. The server reads it from the incoming message and copies it into the reply. The client matches replies to pending requests by comparing correlation IDs.

Request-Reply Pattern

Name: System Design Masterclass
Availability: InStock

in Messaging Event Systems

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