CSS

Question 1

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

Answer 1

Declaration block
Selector
Property:value pairs

Question 2

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

Answer 2

.class

Question 3

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

Answer 3

idname

Question 4

Name 3 different type values you can use to specify colors in CSS:

Answer 4

rgb
rgba
hex
hsl

Question 5

What CSS properties make up the box model?

Answer 5

height 
width
padding  
border 
margin

Question 6

Which CSS property pushes boxes away from each other?

Answer 6

margin

Question 7

What CSS property adds space between the content of a box and its border?

Answer 7

padding

Question 8

What is a pseudo class?

Answer 8

A keyword added to a selector that specifies a specific state of the selected element(s).

Question 9

What are CSS pseudo classes useful for?

Answer 9

They allow developers to style elements when the user is interacting with the elements differently than when the user is not interacting with them.

Question 10

What is a fall back value?

Answer 10

With font-family we use a fall back value along with the value in case the browser doesn’t have the first value available.

Question 11

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

Answer 11

px

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 the flex container?

Answer 13

row

Question 14

what is the default flex-wrap of the flex container?

Answer 14

nowrap

Question 15

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

Answer 15

Div elements are block-level 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

Normal flow

Question 18

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

Answer 18

This moves an html element from its normal flow position and shifts it up/down/left/right.

However, it doesn’t affect elements surrounding it in the flow of the document

Question 19

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

Answer 19

It shifts the element without disrupting the surrounding elements. So it moves it within its parent container essentially.

Question 20

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

Answer 20

It does not affect the normal flow of the document as elements essentially act as though the element is not there.

Question 21

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

Answer 21

It allows an element to be positioned in relation to its containing element rather than the other elements within the container.

Question 22

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

Answer 22

set the element you want your element inside of to position: relative or absolute and not static

Question 23

What are the four box offset properties?

Answer 23

top
bottom
right
left

Question 24

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

Answer 24

The further down in your style sheet the stronger the styling is considered

Question 25

How is it possible for the styles of an element to be applied to its children without additional css rule set?

Answer 25

Through inheritance as long as there isn't more specific styling on the child elements

Question 26

List 3 selector types in order of increasing specificity:

Answer 26

``` type class id ```

Question 27

Why is using !important bad practice?

Answer 27

It can make debugging a problem as it gives it supreme importance in the style sheet

Question 28

What are the 4 components of "the cascade"?

Answer 28

Source order Inheritance Specificity !important

Question 29

What does the transform property do?

Answer 29

It lets you change the shape and orientation of an element

Question 30

Give four examples of CSS transform functions:

Answer 30

``` rotate translate skew scale perspective ```

Question 31

.pokeball-wrapper:first-child > img.pokeball { } read this

Answer 31

we have a new css rule set with selector image elements with class pokeball that are the direct child of elements with class pokeball wrapper and the pseudo-class first-child

Question 32

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

Answer 32

``` color hover pointer width orientation min-width max-width ```

Question 33

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

Answer 33

meta name="VIEWPORT" content="width=device-width, initial-scale=1"

Question 34

Read | @media only screen and (min-width: 768px) {

Answer 34

there is a media rule set for only media type screen with a media feature, min-width, that has a value of 768px and an opening curly brace for the media rule set

Question 35

The "transition" property is shorthand for which four CSS properties?

Answer 35

transition-property transition-duration transition-timing-function transition-delay

Question 36

What is a breakpoint in responsive web design?

Answer 36

A point when certain media styles will begin to influence the web page. Most often associated with different viewport widths. layout styles usually shift at these breakpoints

Question 37

What is the advantage of using percentage width instead of fixed width for a column class in a responsive layout?

Answer 37

the width of our content is more easily able to adapt to changes in viewport width

Question 38

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?

Answer 38

due to source order use smaller to larger changes in width as the you write code further down the page use min-width over max-width

Question 39

What is JSON?

Answer 39

JSON is a text-based data interchange format following javascript object syntax useful when you want to transmit data across a network and save them to a hard-drive It needs to be converted to a native JS object when you want to access the data.

Question 40

What is serialization?

Answer 40

is the process of turning an object in memory into a stream of bytes so you can do stuff like store it on disk or send it over the network Serialization means transforming something (e.g. my dog Rex) into a series of 1s and 0s - which can be transported over the phone line, stored in memory. My friends overseas can then translate those 1s and 0s back into a perfect representation of a puppy (de-serialization) so they can enjoy Rex's company.

Question 41

What is deserialization?

Answer 41

Deserialization is the reverse process: turning a stream of bytes into an object in memory.

Question 42

How do you serialize a data structure into a JSON string using JS?

Answer 42

JSON.stringify

Question 43

How do you deserialize a data structure into a JSON string using JS?

Answer 43

JSON.parse

Question 44

A byte is:

Answer 44

a series of eight 0's and 1's 8 bits in a byte