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Home » Quiz » JavaScript Quiz

A(n) _______ function returns a promise.

Difficulty level
  • Synchronous
  • Callback
  • Async
  • Static
An Async function returns a promise implicitly. When you declare a function as async, it means the function will always return a promise, allowing you to use await inside it to handle asynchronous operations more cleanly.
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JavaScript Quiz
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How can we determine whether a PHP variable is an instantiated object of a certain class?
You are developing a function that needs to maintain state between calls without using global variables. Which JavaScript feature would you utilize to achieve this?

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