TypeScript Fundamentals

Preview — 3 of 10 questions

What best describes TypeScript?

AA new programming language completely unrelated to JavaScript

BA JavaScript framework like React or Angular

CA statically typed superset of JavaScript that compiles to JavaScript

DA JavaScript runtime environment like Node.js

Which line would TypeScript flag as a type error?

javascript

let name: string = "Alice";
let age: number = 30;
let isActive: boolean = true;

Aname = "Bob"

Bname = 42

Cage = 31

DisActive = false

Which declaration correctly types an array of strings in TypeScript?

Alet words: [string] = ["hello", "world"]

Blet words: string[] = ["hello", "world"]

Clet words: string = ["hello", "world"]

Dlet words: Array = ["hello", "world"]

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