CSS

Question 1

What are the names of the individual pieces of a CSS rule?

Answer 1

Selector(sometimes pseudo), declaration block, property, value

Question 2

In CSS, how do you select elements by their class attribute?

Answer 2

.class { }

Question 3

In CSS, how do you select elements by their type?

Answer 3

type { }

Question 4

In CSS, how do you select an element by its id attribute?

Answer 4

id { }

Question 5

Name three different types of values you can use to specify colors in CSS.

Answer 5

Color names, hex values, rgb values

Question 6

What CSS properties make up the box model?

Answer 6

Border, margin, padding

Question 7

Which CSS property pushes boxes away from each other?

Answer 7

Margin

Question 8

Which CSS property adds space between a box’s content and its border?

Answer 8

Padding

Question 9

What is a pseudo-class?

Answer 9

A keyword added to a CSS selector to specify different special states

Question 10

What are CSS pseudo-classes useful for?

Answer 10

To add a measure of functionality to the styling of elements when they are in special states differing from their initial state

Question 11

Name at least two units of type size in CSS.

Answer 11

px, rem, em

Question 12

What CSS property controls the font used for the text inside an element?

Answer 12

font-family

Question 13

What is the default flex-direction of a flex container?

Answer 13

row

Question 14

What is the default flex-wrap of a flex container?

Answer 14

nowrap

Question 15

Why do two div elements “vertically stack” on one another by default?

Answer 15

They are block elements

Question 16

What is the default flex-direction of an element with display: flex?

Answer 16

row

Question 17

What is the default value for the position property of HTML elements?

Answer 17

static

Question 18

How does setting position: relative on an element affect document flow?

Answer 18

It doesn’t affect document flow

Question 19

How does setting position: relative on an element affect where it appears on the page?

Answer 19

In relation to where the element is positioned normally (only if you move it yourself)

Question 20

How does setting position: absolute on an element affect document flow?

Answer 20

The element set to position:absolute is taken out of normal flow
Other elements will take over its space

Question 21

How does setting position: absolute on an element affect where it appears on the page?

Answer 21

In relation to other elements on the page

Question 22

How do you constrain an absolutely positioned element to a containing block?

Answer 22

Set to absolute, set offset properties, adjust width/height of other elements

Question 23

What are the four box offset properties?

Answer 23

Top, bottom, left, right

Question 24

What are the four components of “the Cascade”.

Answer 24

Source order, inheritance, specificity, !important

Question 25

What does the term “source order” mean with respect to CSS?

Answer 25

The order in which the the css rule is written

Question 26

How is it possible for the styles of an element to be applied to its children as well without an additional CSS rule?

Answer 26

The children inherit the css rules of its parent

Question 27

List the three selector types in order of increasing specificity.

Answer 27

1. Type selectors
2. Class selectors
3. ID selectors

Question 28

Why is using !important considered bad practice?

Answer 28

It breaks the natural cascading rules and makes debugging much more difficult

Question 29

What does the transform property do?

Answer 29

It allows you to modify the “physical” properties of an html element

Question 30

Give four examples of CSS transform functions.

Answer 30

Translate, rotate, scale, skew

Question 31

The transition property is shorthand for which four CSS properties?

Answer 31

Transition-property, transition-duration, transition-timing-function, transition-delay

Question 32

Give two examples of media features that you can query in an @media rule.

Answer 32

Changing the width property of an element

Making different number of images wrap in a flexbox

Question 33

Which HTML meta tag is used in mobile-responsive web pages?

Answer 33

Viewport meta tag

Question 34

What is a breakpoint in responsive Web design?

Answer 34

They are points at which a media query is set off

Question 35

What is the advantage of using a percentage (e.g. 50%) width instead of a fixed (e.g. px) width for a “column” class in a responsive layout?

Answer 35

It scales with its parent class so it can change its size with a changing environment

Question 36

If you introduce CSS rules for a smaller min-width after the styles for a larger min-width in your style sheet, the CSS rules for the smaller min-width will “win”. Why is that?

Answer 36

Cascading and more specifically “source-order” – if two rules (or more) are competing to set their properties, the bottom one will be take effect