DNS — Node.js Technical Interview Questions & Answers

DNS

DNS

  • DNS is a Node.js topic. In plain words you use it for a short DNS example in a script or API on localhost. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest DNS example you can type. Type it, run it, and say what you see. If you can do that from memory, you know DNS.
  • From the example next to this theory: DNS: find user 2, then list names.
  • Trap: only saying “DNS” with no example. Fix that before you talk about advanced Node.js.
  • Viva: what is DNS? Then show the smallest DNS example you can type. Then name the trap.

Technical Interview Tip: What is DNS? Show this: the smallest DNS example you can type. Trap: only saying “DNS” with no example.

Code Examples for DNS

DNS — working example

// DNS
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

DNS: find user 2, then list names. Say both prints.

How to Explain DNS to an Interviewer

What is DNS?

Used for a short DNS example a script or API on localhost Not just the heading

Give one small example of DNS.

the smallest DNS example you can type DNS: find user 2, then list names

What mistake do beginners make with DNS?

only saying “DNS” with no example Show the fix

Where do you use DNS?

a script or API on localhost a short DNS example