JavaScript Basics

5 questions covering core JS concepts. · 5 questions — free online quiz on Quizyk, no sign-up required.

5 questions · Updated 2026-08-21

Questions in this quiz

1. Which keyword declares a block-scoped variable in JavaScript?
2. JavaScript is a statically typed language.
3. What does `typeof null` return in JavaScript?
4. Which of these are valid ways to declare a function in JavaScript?
5. What will `console.log(0.1 + 0.2 === 0.3)` output?