Modern JavaScript from the Beginning - Second Edition - Creating Arrays

This video tutorial covers the basics of arrays in JavaScript, including their structure, creation, and manipulation. It explains how arrays are a type of object that can store multiple values, and how to access these values using indices. The tutorial also discusses the mutability of arrays, the use of the length property, and different methods to modify arrays, such as adding elements. The video concludes with a brief mention of array methods to be covered in the next video.

What is a unique feature of arrays in JavaScript compared to other data structures?

• They cannot be nested.

• They can store multiple data types.

• They are not zero-based.

• They can only store numbers.

Which of the following is a correct way to create an array using an array literal?

• var arr = new array[];

• var arr = array();

• var arr = [];

• var arr = new Array();

How can you access the third element in an array named 'fruits'?

• fruits[0]

• fruits[1]

• fruits[3]

• fruits[2]

What will be the output of the following code: console.log(numbers[0] + numbers[3]); if numbers = [12, 5, 8, 29]?

• 12

• 41

• 17

• 29

Which property of an array can be used to determine the number of elements it contains?

• index

• size

• count

• length

How can you change the second element of an array 'fruits' to 'pear'?

• fruits[3] = 'pear';

• fruits[1] = 'pear';

• fruits[2] = 'pear';

• fruits[0] = 'pear';

What is a common method used to add an element to the end of an array?

• add()

• insert()

• append()

• push()