Quiz - JavaScript Arrays and Objects Quiz | Lancecourse

JavaScript Arrays and Objects Quiz

Test your knowledge of arrays and objects in JavaScript.

Question 1 What method adds an element to the end of an array?: push() get() add() append()

Question 2 How do you access the property of an object?: object.property object[] object.get() object.property[]

Question 3 What will fruits.length return for the array `fruits=['apple', 'banana']`?: 2 3 undefined NaN

Question 4 Which method removes the last element from an array?: pop() shift() remove() delete()

Question 5 What does `push()` do in JavaScript?: Adds an element to the end of an array Removes the first element of an array Creates a new array Clears an array

Question 6 How do you delete a property from an object?: delete object.property remove property object.remove(property) clear(object.property)

Question 7 Which of the following is an array of objects?: const users = [{name: "Alice"}, {name: "Bob"}] const users = "Alice, Bob" const users = ["Alice", "Bob"] const users = new Object()

Question 8 What method would you use to check if an array includes a certain value?: includes() indexOf() find() contains()

Question 9 How can you iterate over an array in JavaScript?: forEach() map() reduce() filter()

Question 10 What is the correct way to create an object in JavaScript?: const obj = {} const obj = new Object() const obj = [] const obj = Object.create()

Answer all the questions then submit.