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Imagine you're using Uber. You request a ride. Within seconds, your request reaches an available driver near you. But here's the interesting question. How did Uber know which driver service to contact?
Imagine you're scrolling through your Instagram feed. You like a post. Your friend refreshes their phone immediately. For a few seconds... they still don't see your like. Did the system lose your data? No.
Imagine you're transferring ₹10,000 from your bank account to your friend's account. The process looks simple. Your account balance decreases. Your friend's balance increases. Now imagine something goes wrong halfway through. Your account is debited. But your friend's account is never credited because the database crashed. The money disappears.
System Design Series — Part 33 Imagine you're ordering food on Swiggy. You click "Place Order." The app sends a request to the Payment Service. Suddenly... The Payment Service doesn't respond. Was the payment server completely down?
System Design Series — Part 29 Have you ever clicked one of these buttons? Continue with Google Sign in with GitHub Login with Microsoft You didn't create a new password.
One of the most common interview questions is: "What's the difference between Authentication and Authorization?" Surprisingly, many developers use these terms interchangeably. But they are not the same thing.
System Design Series — Part 25 Imagine you're building an e-commerce application. The homepage needs to display: Product name Price Product image Average rating Seller name
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