JavaScript Quiz
Check what you have learned in this tutorial. Answer each question, then read the explanation.
How to Use This Quiz
- There are 10 questions, covering the whole tutorial
- Pick one answer for each question
- If you get one wrong, go back to that lesson and try its examples again
Questions
Exercise
1. Which keyword creates a variable that cannot be reassigned?
Exercise
2. What does console.log("3" + 4) show?
Exercise
3. Which comparison checks both value and type?
Exercise
4. What is the index of the first item in a JavaScript array?
Exercise
5. Which array method returns a new array containing only the items that pass a test?
Exercise
6. What does this function return? const area = (w, h) => w * h; area(4, 5)
Exercise
7. Which value is falsy in JavaScript?
Exercise
8. Which line changes the text of the element with id="title"?
Exercise
9. What does JSON.stringify({ a: 1 }) return?
Exercise
10. In what order are the messages shown? console.log("A"); setTimeout(() => console.log("B"), 0); console.log("C");
What Next?
Well done for finishing the JavaScript tutorial. Next, try TypeScript to add types to your JavaScript, or jQuery to see a classic library built on it.
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