CSS

Question 1

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

Answer 1

selector, declaration = property: value;

Question 2

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

Answer 2

.class-name

Question 3

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

Answer 3

element-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

rgb values, hex codes, color values

Question 6

What CSS properties make up the box model?

Answer 6

padding, border, margin

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

class applied to element by browser in special circumstances

Question 10

What are CSS pseudo-classes useful for?

Answer 10

applying styling based on user actions

Question 11

Name at least two units of type size in CSS.

Answer 11

pixels, percentages, ems

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

div is a block-level element

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 change anything

Question 19

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

Answer 19

It moves the element relative to its normal position

Question 20

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

Answer 20

The surrounding elements act like the element isn’t there and fill the gap

Question 21

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

Answer 21

It moves the element in relation to the containing non-static element

Question 22

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

Answer 22

The container must be non-static too

Question 23

What are the four box offset properties?

Answer 23

top, bottom, right, left

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 CSS rules are written in the stylesheet

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

for some properties, children inherit the styles of the parent element

Question 27

List the three selector types in order of increasing specificity.

Answer 27

type, .class, #id

Question 28

Why is using !important considered bad practice?

Answer 28

breaks the natural cascading of styles, making it harder to pinpoint any issues in the stylesheet

Question 29

What does the transform property do?

Answer 29

moves an element along the CSS coordinate plane

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

hover, min-width

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

the points at which a media query is introduced

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 adjusts with the size of the screen

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

source order