Front End Development Front-End Development Course 2

Question 1

Which CSS property controls the stacking order of overlapping elements?

Accepted Answer

z-index

Answer

z-index determines which element appears on top when elements overlap, with higher values placed in front.

Question 2

What does the CSS `box-sizing: border-box` rule do?

Accepted Answer

Includes padding and border in the element's total width and height

Answer

border-box makes width and height include padding and border, so the element never exceeds its declared size.

Question 3

In JavaScript, what is the output of `typeof null`?

Accepted Answer

"object"

Answer

typeof null returns "object" due to a historical bug in JavaScript's type system that was never fixed for backward compatibility.

Question 4

Which HTML element is used to define a self-contained piece of content that could be independently distributed?

Accepted Answer

Answer

<article> represents self-contained content like a blog post or news story that makes sense on its own.

Question 5

What is the purpose of the CSS `::before` pseudo-element?

Accepted Answer

Inserts generated content before an element's actual content

Answer

::before inserts a generated content box as the first child of the selected element, commonly used with the `content` property.

Front End Development Practice Test