CSS

Question 1

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

Answer 1

type of selector, curly brace, decoration block (property and 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

input[type=attribute name] {

Question 4

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

Answer 4

name of id {

Question 5

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

Answer 5

RGB values, hex codes, and color names.

Question 6

What CSS properties make up the box model?

Answer 6

Borders, margins, paddings, and the actual content.

Question 7

Which CSS property pushes boxes away from each other?

Answer 7

Margin. It is an invisible space around your box and this pushes other elements away from the box.

Question 8

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

Answer 8

Padding. It is the space between the content of an element and the border of that same element.

Question 9

What is a pseudo-class?

Answer 9

It provides a special state of the selected element to the specified selector.

Question 10

What are CSS pseudo-classes useful for?

Answer 10

It’s useful when you want to give action to a specified selector, such as styling links or responding to users.

Question 11

Name at least two units of type size in CSS.

Answer 11

Px (pixels), rem (root element).

Question 12

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

Answer 12

The 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

Because they are block elements.

Question 16

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

Answer 16

It displays in a row.

Question 17

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

Answer 17

Position: static.

Question 18

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

Answer 18

It doesn’t affect the document flow if there is no value for the property.

Question 19

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

Answer 19

It could be displaced visually by top, right, bottom, left offsets properties.

Question 20

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

Answer 20

It no longer exists in the normal document flow. It has its own layer and separates it from everything else.

Question 21

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

Answer 21

It shows an isolated element that doesn’t interfere with other elements on the page.

Question 22

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

Answer 22

Put absolute position inside of relative position.

Question 23

What are the four box offset properties?

Answer 23

Top, right, bottom, left.

Question 24

What are four components of “the Cascade”.

Answer 24

Importance, source order, inheritance, specificity.

Question 25

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

Answer 25

The lower is more powerful than the higher.

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

Inherited properties.

Question 27

List the three selector types in order of increasing specificity.

Answer 27

Type selectors, class selectors, id selectors.

Question 28

Why is using !important considered bad practice?

Answer 28

Because it overrides any other declarations when this is used. Therefore, it breaks the natural cascading of the stylesheet, which makes it more difficult to troubleshoot when debugging.

Question 29

What does the transform property do?

Answer 29

It allows the element to rotate, scale, skew or translate. It modifies the coordinate space of the CSS visual formatting model.

Question 30

Give four examples of CSS transform functions.

Answer 30

rotate(), scale(), translateX(), translateY().

Question 31

The transition property is shorthand for which four CSS properties?

Answer 31

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

Question 32

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

Answer 32

Width and height, color, hover.

Question 33

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

Answer 33

Meta viewport.

Question 34

What is a breakpoint in responsive Web design?

Answer 34

It is a point that the site content responds to provide the best possible layout to the user depending on their devices.

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

When the screen zooms in or out, the percentage width can be changed to the percentage width that fits the screen size, but the fixed width, such as pixels, cannot be changed.

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

Because of the source order of the CSS. The bottom order is more powerful.