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Introduction to System Design

What is System Design?

The Client-Server Model

Core Components of a System

Understanding Servers

Understanding Databases

Understanding Clients

Communication and Growth

How Components Talk: APIs

Introduction to Scalability

Assessments and Feedback

Quiz: System Design Basics

Quiz: Client-Server Interactions

Quiz: Servers and Databases

Quiz: Communication and APIs

Quiz: Scalability Concepts

Course Completion Survey

Foundations of System Design: Core Components and Interactions is a beginner-friendly course that demystifies how modern software systems are planned, built, and scaled. If you’ve written scripts or used apps but wondered how everything works together—clients, servers, databases, and APIs—this course connects the dots with clear explanations and practical examples. You’ll start by understanding system design as the blueprint of an application, then explore the client–server model, the roles of servers and databases, and how user interfaces interact with backend services. We’ll also introduce essential concepts like reliability, scalability, and availability so you can think beyond single machines and plan for growth. Through relatable scenarios—from logging in to a site to fetching flight prices—you’ll see how components communicate and how design choices impact performance and user experience. By the end, you’ll have a solid vocabulary, mental models for architecture, and the confidence to discuss and design small-to-medium systems that can evolve. Whether you’re preparing for interviews, collaborating with engineering teams, or leveling up your product and technical decision-making, this course gives you a strong foundation to build on.

Foundations of System Design: Core Components and Interactions

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            <p>Software development extends far beyond writing isolated scripts or individual lines of code; it involves orchestrating a complex collection of moving parts that work in harmony to deliver a seamless user experience. System design is the foundational process of defining the architecture, components, and interfaces of a system to ensure it meets specific functional and non-functional requirements. Much like a blueprint guides the construction of a house, system design provides the structural roadmap for building massive applications like Instagram or Uber. By mastering core concepts such as scalability, reliability, and availability, developers can transition from creating simple programs to engineering robust, multi-component systems capable of serving millions of users simultaneously.</p>

<p>This course explores the fundamental building blocks of modern software, beginning with the essential client-server model and the request-response cycle that facilitates digital communication. Participants will dive deep into the specific roles of servers, databases, and clients, learning how business logic is processed, how data is persistently stored for quick retrieval, and how front-end interfaces serve as the gateway for user interaction. Beyond individual components, the curriculum covers the critical mechanisms of communication through Application Programming Interfaces (APIs) and the strategies for handling growth. By examining concepts like horizontal and vertical scaling, as well as load balancing, learners will gain the insights necessary to design systems that remain performant even under the pressure of massive traffic surges.</p>
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