Spread Operator with Objects — JS Technical Interview Questions & Answers

Shallow-cloning and merging objects with {...obj}.

Spread Operator with Objects

  • Spread Operator with Objects (js) is a JS topic. In plain words you use it for { name, marks } in a student record. Don’t start with a slogan — start with that picture.
  • Smallest example: const { name } = student. Type it, run it, and say what you see. If you can do that from memory, you know Spread Operator with Objects (js).
  • From the example next to this theory: Shallow-cloning and merging objects with {.
  • Trap: copying nested objects by accident (shallow copy). Fix that before you talk about advanced JS.
  • Viva: what is Spread Operator with Objects (js)? Then show const { name } = student. Then name the trap.

Technical Interview Tip: What is Spread Operator with Objects (js)? Show this: const { name } = student. Trap: copying nested objects by accident (shallow copy).

Code Examples for Spread Operator with Objects

Spread Operator with Objects — 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");

Spread Operator with Objects — modern JS: arrows, template strings, destructuring, spread/rest, ?. and ?? for safe defaults.

How to Explain Spread Operator with Objects to an Interviewer

What is Spread Operator with Objects (js)?

Used for { name, marks } a student record Not just the heading

Give one small example of Spread Operator with Objects (js).

const { name } = student Shallow-cloning and merging objects with {

What mistake do beginners make with Spread Operator with Objects (js)?

copying nested objects by accident (shallow copy) Show the fix

Where do you use Spread Operator with Objects (js)?

a student record { name, marks }