All Questions

How do you ensure a payment API does not charge a customer twice if the network fails halfway through?

Deep dive into libuv, the interaction between microtasks and macrotasks, and `setImmediate` vs `process.nextTick`.

Walk through the exact steps the browser takes from receiving HTML bytes to painting pixels on the screen.

We have 50TB of user data. Explain the strategies to split this data across multiple nodes.

Why did we move from TCP to UDP for HTTP/3? Explain Head-of-Line blocking.

Explain how React Fiber enables concurrent rendering and how it differs from the old stack reconciler.