JavaScript Associate

Which built-in method converts an integer to a string in a specified base (radix)?

JavaScript AssociateEasy

Try Now

Which method converts a JSON string into a JavaScript object?

JavaScript AssociateEasy

Try Now

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

JavaScript AssociateEasy

Try Now

What does the === operator check compared to ==?

JavaScript AssociateEasy

Try Now

What does the logical nullish assignment operator (??=) do?

JavaScript AssociateEasy

Try Now

Which array method creates a new array with the results of calling a function on every element?

JavaScript AssociateEasy

Try Now

What is the output of: console.log(typeof function(){})?

JavaScript AssociateEasy

Try Now

What is the result of 0.1 + 0.2 === 0.3 in JavaScript?

JavaScript AssociateEasy

Try Now

Which string method returns the index of the first occurrence of a substring, or -1 if not found?

JavaScript AssociateEasy

Try Now

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

JavaScript AssociateEasy

Try Now

What does Object.keys() return?

JavaScript AssociateEasy

Try Now

What does the spread operator (…) do when used with an array?

JavaScript AssociateEasy

Try Now

What is the purpose of the Promise.all() method?

JavaScript AssociateEasy

Try Now

What is hoisting in JavaScript?

JavaScript AssociateEasy

Try Now

What does the async keyword do when placed before a function declaration?

JavaScript AssociateEasy

Try Now

Which of the following is NOT a falsy value in JavaScript?

JavaScript AssociateEasy

Try Now

What does the await keyword do inside an async function?

JavaScript AssociateEasy

Try Now

What does Array.prototype.filter() return?

JavaScript AssociateEasy

Try Now