- 1: [undefined × 3], [undefined × 2, 100], [undefined × 3] - 2: [empty × 3], [empty × 2, 100], [empty × 3] - 3: [null × 3], [null × 2, 100], [null × 3] - 4: [], [100], []

##### Answer: 2 The latest chrome versions display sparse array(they are filled with holes) using this empty x n notation. Whereas the older versions have undefined x n notation. Note: The latest version of FF displays n empty slots notation.

JavaScript Coding Exercise 8 | JSCodingQuestions.com

javascript

1var array1 = new Array(3);
2
3console.log(array1);
4
5var array2 = [];
6
7array2[2] = 100;
8
9console.log(array2);
10
11var array3 = [, , ,];
12
13console.log(array3);

Choose the correct output:

[undefined × 3], [undefined × 2, 100], [undefined × 3]

[empty × 3], [empty × 2, 100], [empty × 3]

[null × 3], [null × 2, 100], [null × 3]

[], [100], []