CSS

Question 1

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

Answer 1

Selector { declaration (declaration has a property: value pair) }

Question 2

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

Answer 2

Use .classname

Question 3

In CSS, how do you select elements by their tag name?

Answer 3

Write the list of tags you want to target separated by commas.

Question 4

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

Answer 4

idname

Question 5

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

Answer 5

Keywords, RGB Values (either as CSV or hexadecimal), and HSL (height, saturation, lightness)

Question 6

What CSS properties make up the box model?

Answer 6

Margin, border, padding, content

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 box-sizing “border-box”?

Answer 9

This prevents the box from stretching beyond the size you want — instead shrinks content

Question 10

True or False: Padding and margin are the preferred way to center content on the page.

Answer 10

False — they should only be used for small moves! (Like giving text in an input box space)

Question 11

What is a pseudo-class?

Answer 11

Add style to selectors that only activate under certain conditions to change state or position

Question 12

What are CSS pseudo-classes useful for?

Answer 12

Increasing usability of your webpage

Question 13

Name two types of units that can be used to adjust font-size in CSS.

Answer 13

Px, em, rem, %

Question 14

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

Answer 14

Font-family

Question 15

What is the different between rem and em?

Answer 15

rem is based on the root document size (1rem = 16px) but ‘em checks most direct parent

Question 16

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

Answer 16

row — justify content works on the horizontal axis

Question 17

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

Answer 17

Nowrap

Question 18

• Justify content works on the _______ axis, and align items works on the __________ axis.

Answer 18

Primary, secondary.

Question 19

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

Answer 19

Div elements are block elements by default

Question 20

What are the four components of “the Cascade”

Answer 20

Source order, inheritance, specificity, and !important

Question 21

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

Answer 21

The order that rulesets appear in the style sheet

Question 22

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

Answer 22

Inheritance!

Question 23

List the three selector types in order of increasing specificity.

Answer 23

Type, class, id

Question 24

Why is using !important considered bad practice?

Answer 24

Typically you can achieve what you’re trying to do through source order

Question 25

What does the transform property do?

Answer 25

Lets you visually change the alignment of an element.

Question 26

Give four examples of CSS transform functions.

Answer 26

Translate, scale, rotate, skew

Question 27

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

Answer 27

Max/min width, orientation, pixel-sizes, …

Question 28

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

Answer 28

The meta tag with name=viewport

Question 29

The transition property is shorthand for what 4 properties?

Answer 29

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

Question 30

What is a breakpoint in reponsive web design?

Answer 30

Widths that cause content to “break” in some way — like being far too long or too squished

Question 31

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 31

Percentages will scale with the screen as it changes, pixels won’t

Question 32

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 32

CSS rules are applied in order from top to bottom of the code!