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Learn JavaScript Basics III

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Knowledge Check

Take this customized & interactive quiz to test your knowledge on JavaScript Basics III, then check out the learning resources below.

Question 1 of 4

Given the following array and function:

  numbers = [0, 1, 2, 3, 4, 5]

Which of the following is NOT an example of using a callback to filter the odd numbers?

```
  function isOddNumber(number) {
    return number % 2;
  }
  numbers.filter(isOddNumber)
```

  function isOddNumber(number) {
    return number % 2;
  }
  numbers.filter(isOddNumber())

  numbers.filter(function(number) {
    return number % 2;
  })

Core Learning

The fastest way to learn JavaScript Basics III is simply to study these exact resources. Focus on the 👀 to learn extra quickly and save time!

JavaScript Callbacks

👀 1 Thing to Focus On

Understand how JS functions are defined and called

JavaScript Promises

👀 1 Thing to Focus On

Know how to use prototypes

Chaining Promises

👀 1 Thing to Focus On

Error Handling Promises

👀 1 Thing to Focus On

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