CSS

Question 1

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

Answer 1

properties, declaration block, selector, 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

Element-name (h1, body, article)

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

Hex codes, rgb values, and color names (less often: rgba)

Question 6

What is the box model?

common interview question

Answer 6

how css interprets a box including margin, border, and padding

Question 7

What CSS properties make up the box model?

Answer 7

Margin, border, padding

Question 8

Which CSS property pushes boxes away from each other?

Answer 8

margin

Question 9

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

Answer 9

padding

Question 10

What is a pseudo-class?

Answer 10

It’s a keyword added to a selector that specifies a special state of the selected element(s)

Question 11

What are CSS pseudo-classes useful for?

Answer 11

They apply a style to elements when interacted with by the user

Question 12

Name at least two units of type size in CSS.

Answer 12

Pixels, percentages, and ems

Question 13

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

Answer 13

font-family

Question 14

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

Answer 14

row

Question 15

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

Answer 15

nowrap

Question 16

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

Answer 16

Div elements are block elements

Question 17

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

Answer 17

row

Question 18

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

Answer 18

static

Question 19

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

Answer 19

It doesn’t affect document flow.

Question 20

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

Answer 20

It’s position is relative to where it’s normal placement

Question 21

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

Answer 21

The document acts like it doesn’t exist to other elements surrounding it

Question 22

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

Answer 22

Will position that element within the nearest non static parent if not the vp

Question 23

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

Answer 23

You can control where it is positioned by placing it within a non static positioned element

Question 24

What are the four box offset properties?

Answer 24

Top, bottom, left, right

Question 25

What are the four components of “the Cascade”.

Answer 25

Source order, inheritance, specificity, !important

Question 26

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

Answer 26

If multiple rules affect the same element then the latter rule in the stylesheet takes precedence over rules above that rule

Question 27

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

Answer 27

If property isn’t an inherited property, then you can give that property a value of “inherit”

Question 28

List the three selector types in order of increasing specificity.

Answer 28

Id selectors > class selectors/attributes selectors/pseudo-classes > type selectors, pseudo-elements

Question 29

Why is using !important considered bad practice?

Answer 29

It’s bad practice because it can be hard to debug.

Question 30

What does the transform property do?

Answer 30

It lets you rotate, scale, skew, or translate an element

Question 31

Give four examples of CSS transform functions.

Answer 31

Translate, scale, skew, rotate, matrix, perspective

Question 32

The transition property is shorthand for which four CSS properties?

Answer 32

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

Question 33

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

Answer 33

Max-width and min-width

Question 34

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

Answer 34

meta name=”viewport” content=”width=device-width, initial-scale=1”

Question 35

What is a breakpoint in responsive Web design?

Answer 35

The points at which a media query is introduced

Question 36

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 36

It allows for more flexibility and will work for variety of different vp sizes

Question 37

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 37

It comes later in the cascade source order so it is applied over the rule above it.

Question 38

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

Answer 38

Max-width and min-width

Question 39

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

Answer 39

meta name=”viewport” content=”width=device-width, initial-scale=1”