What is the difference between microtask and macrotask queue?

Short answer: Type Example Priority Microtask Promise.then, MutationObserver Higher Macrotask setTimeout, setInterval Lower Example: setTimeout(() => console.log("Macro"), 0);

Example code

Promise.resolve().then(() => console.log("Micro")); // Output: Micro → Macro

Real-world example (ShopNest)

ShopNest’s browser cart uses modern JavaScript: fetch APIs with async/await, modules, and clear error handling.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.