JavaScript Basics Quiz

Variables, functions and the DOM — test your JavaScript.

Pass mark: 50% · 4 questions

1. Which keyword declares a block-scoped variable? A. var B. let C. static D. define

2. What does console.log do? A. Deletes the page B. Prints to the browser console C. Saves a file D. Reloads the page

3. A function that returns true for even numbers is? A. function isEven(n) { return n % 2 === 0; } B. function even(n) { n % 2; } C. isEven => n *= 2 D. return even(n)

4. Which method changes an element's text? A. document.getElementById("t").textContent B. document.write(2) C. el.remove() D. el.hide("t")