JavaScript Associate

Which statement correctly creates an object in JavaScript?

JavaScript AssociateEasy

Try Now

What is NaN in JavaScript?

JavaScript AssociateEasy

Try Now

What does the `this` keyword refer to in a regular function called in the global scope (non-strict mode)?

JavaScript AssociateEasy

Try Now

What is the purpose of `Array.prototype.map()`?

JavaScript AssociateEasy

Try Now

Which method removes and returns the last element of an array?

JavaScript AssociateEasy

Try Now

What is the correct syntax for an arrow function that doubles a number?

JavaScript AssociateEasy

Try Now

What does `console.log(0.1 + 0.2 === 0.3)` output?

JavaScript AssociateEasy

Try Now

What does `===` check in JavaScript?

JavaScript AssociateEasy

Try Now

What is the output of `typeof null` in JavaScript?

JavaScript AssociateEasy

Try Now

Which method adds one or more elements to the end of an array?

JavaScript AssociateEasy

Try Now

Which keyword declares a variable that cannot be reassigned?

JavaScript AssociateEasy

Try Now

What is the purpose of the super keyword inside a class constructor?

JavaScript AssociateEasy

Try Now

Which loop guarantees that its body executes at least once?

JavaScript AssociateEasy

Try Now

What does the for…of loop iterate over?

JavaScript AssociateEasy

Try Now

What does the rest parameter (…args) do in a function definition?

JavaScript AssociateEasy

Try Now

What does the localStorage API store and for how long?

JavaScript AssociateEasy

Try Now

What is the output of: [1, 2, 3].indexOf(4)?

JavaScript AssociateEasy

Try Now

What is the purpose of the Array.from() method?

JavaScript AssociateEasy

Try Now