Rest Parameters — JS Technical Interview Questions & Answers

Collecting extra arguments into an array with ...args.

Rest Parameters

  • Rest Parameters (js) is a JS topic. In plain words you use it for a short Rest Parameters js example in a script in the browser. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest Rest Parameters js example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Rest Parameters (js).
  • From the example next to this theory: Collecting extra arguments into an array with.
  • Trap: only saying “Rest Parameters js” with no example. Fix that before you talk about advanced JS.
  • Viva: what is Rest Parameters (js)? Then show the smallest Rest Parameters js example you can type. Then name the trap.

Technical Interview Tip: What is Rest Parameters (js)? Show this: the smallest Rest Parameters js example you can type. Trap: only saying “Rest Parameters js” with no example.

Code Examples for Rest Parameters

Rest Parameters — working example

const add = (a, b) => a + b;
const name = "Ada";
console.log(`Hi, ${name}!`);

const user = { name: "Lin", city: "Pune", skills: ["CSS"] };
const { city, ...rest } = user;
const skills = [...user.skills, "JS"];
console.log(add(2, 3), city, rest, skills);
console.log(user.profile?.bio ?? "n/a");

Rest Parameters — modern JS: arrows, template strings, destructuring, spread/rest, ?. and ?? for safe defaults.

How to Explain Rest Parameters to an Interviewer

What is Rest Parameters (js)?

Used for a short Rest Parameters js example a script in the browser Not just the heading

Give one small example of Rest Parameters (js).

the smallest Rest Parameters js example you can type Collecting extra arguments into an array with

What mistake do beginners make with Rest Parameters (js)?

only saying “Rest Parameters js” with no example Show the fix

Where do you use Rest Parameters (js)?

a script in the browser a short Rest Parameters js example