FnQuiz

JavaScript functions

Pick one option from each list. After check, green means right and red shows the expected function.

80%

8 / 10 correct

Retake test

1. Which function writes a line to the console?

   console.log

   Correct

2. Which function shows a browser alert box?

   alert

   Correct

3. Which function parses a string into an integer?

   parseInt

   Correct

4. Which function returns a random number from 0 to 1?

   Math.round

   Wrong · expected Math.random

5. Which function rounds a number down?

   Math.floor

   Correct

6. Which function converts a value to a string?

   String

   Correct

7. Which array method adds an item to the end?

   push

   Correct

8. Which function schedules a callback after a delay?

   setTimeout

   Correct

9. Which function parses a JSON string?

   JSON.parse

   Correct

10. Which function returns the current timestamp in milliseconds?

    new Date

    Wrong · expected Date.now