What are default parameters in functions?

Short answer: They provide default values when no argument is passed. Example: function greet(name = "Guest") { return `Hello, ${name}`; }

Example code

They provide default values when no argument is passed. Example: function greet(name = "Guest") { return `Hello, ${name}`;
}

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.