What is an object in JavaScript?

Which of the following statements accurately describes an object in JavaScript?

A). Objects are ordered collections of elements.

B). Objects are collections of key-value pairs.

C). Objects are sequences of characters.

D). Objects are single values.

How do you add an element to the end of an array in JavaScript?

A). Using the push() method

B). Using the add() method

C). Using the append() method

D). Using the end() method

How do you access an array element at a specific index in JavaScript?

A). Using square brackets notation (arrayName[index])

B). Using dot notation (arrayName.elementName)

C). Using parentheses notation (arrayName(index))

D). Using curly braces notation (arrayName{index})

How can you remove the last element from an array in JavaScript?

A). Using the pop() method.

B). Using the shift() method.

C). Using the unshift() method.

D). Using the removeLast() method.

What does the push() method do when used with an array in JavaScript?

A). Removes the last element from the array.

B). Adds elements to the end of the array.

C). Adds elements to the beginning of the array.

D). Sorts the elements in the array.

Which data type represents a collection of values in JavaScript?

A). Object

B). Array

C). String

D). Number

What is the purpose of using arrays in JavaScript?

A). To store a single value

B). To store a collection of values

C). To define object properties

D). To create conditional statements

How do you define a function in JavaScript using a function declaration?

A). function myFunction() { /* code */ }

B). myFunction = function() { /* code */ }

C). myFunction() { /* code */ }

D). myFunction: function() { /* code */ }

What is the purpose of using the length property with arrays in JavaScript?

A). To access the last element of the array.

B). To add elements to the array.

C). To determine the number of elements in the array.

D). To access the first element of the array.

What is a function in JavaScript?

A). A variable

B). A loop

C). A block of code that performs a specific task

D). An object