Fresh Updates
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What Happens When You Type a URL in the Browser?
If you’ve ever sat in an interview, chances are you’ve been asked: “What happens when you type google.com into your browser?” At first, it…
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How Discord Manages Millions of Concurrent Voice Chats
Discord began as a gamer’s chat app. Today, it runs communities, classrooms, podcasts, and giant online events. Millions of people can talk at the…
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Top 20 System Design Interview Questions (with Practical Answers)
System design interviews are less about memorizing answers and more about thinking out loud. When an interviewer asks you, “How would you design Instagram?”…
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Designing a URL Shortener Like Bitly: Step-by-Step Guide
We’ve all seen really long, ugly links. Imagine trying to share this in a tweet or a message: Now compare it with this: That…
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Vector Databases Explained: The Backbone of Modern Applications
When you type a search in Google, ask WhatsApp to find a message, or get a “recommended for you” video on YouTube you’re experiencing…
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How Distributed Databases Work: Sharding, Replication, and CAP Theorem Simplified
Every time you send a message on WhatsApp, scroll Instagram, or order something from Amazon, you’re touching a distributed database without even realizing it.…
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MCP Servers vs AWS: Differences, Use Cases, and Why They Work Better Together
In today’s tech world, AWS (Amazon Web Services) is the first name that comes to mind when we talk about cloud infrastructure. With hundreds…
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Zero Downtime Deployments: Blue-Green, Canary, and Rolling Strategies Explained
One of the most nerve-wracking moments in backend engineering is deploying a new release. A simple mistake can take down production, frustrate users, and…
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How Big Tech Handles Millions of Concurrent Users: Load Balancing Explained
How does Netflix manage to stream to millions at once without buffering? How does Amazon ride massive traffic spikes without melting? A huge part…
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How to Crack Backend Developer Interviews: From DSA to System Design
Backend developer interviews are tough. They’re not just about solving a coding problem in 30 minutes, they’re about proving that you can design, scale,…
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