CSS

Question 1

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

Answer 1

A CSS rule contains two parts: a selector and a declaration.

Question 2

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

Answer 2

To select elements with a specific class, write a period (.) character, followed by the name of the class.

Question 3

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

Answer 3

The CSS type selector matches elements by node name. In other words, it selects all elements of the given type within a document.

Question 4

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

Answer 4

To select an element with a specific id, write a hash (#) character, followed by the id of the element.

Question 5

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

Answer 5

In CSS, colors can be specified by using hexadecimal values, color names, and rBGA values.

Question 6

What CSS properties make up the box model?

Answer 6

The CSS properties that make up the box model are; padding, border, and margin.

Question 7

Which CSS property pushes boxes away from each other?

Answer 7

The CSS property that pushes boxes away from each other is margin.

Question 8

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

Answer 8

The CSS property that adds space between a box’s content and its border is padding.

Question 9

What is a pseudo-class?

Answer 9

A CSS pseudo-class is a keyword added to a selector that specifies a special state of the selected element(s).

Question 10

What are CSS pseudo-classes useful for?

Answer 10

Pseudo-classes let you apply a style to an element in relation to the content of the document tree, and; external factors like the history of the navigator, the status of its content, or the position of the mouse.

Question 11

Name at least two units of type size in CSS.

Answer 11

In CSS, em and ex are examples of units of type size for text font.

Question 12

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

Answer 12

The CSS property that controls the font used for the text inside an element is called font-family.

Question 13

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

Answer 13

The default flex-direction of a flex container is row.

Question 14

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

Answer 14

The default flex-wrap of a flex container is no wrap.

Question 15

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

Answer 15

Two div elements “vertically stack” on one another by default because a div is a block-level element.

Question 16

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

Answer 16

The default flex-direction of an element with display: flex is row.

Question 17

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

Answer 17

Static is always the initial value for the CSS property position.

Question 18

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

Answer 18

Other content in the document is not affected by position: relative.

Question 19

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

Answer 19

The element will move relative to its normal position.

Question 20

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

Answer 20

The element is removed from the document flow.

Question 21

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

Answer 21

It occupies it’s own layer and can appear on top of other elements.

Question 22

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

Answer 22

Set all of its ancestor elements to have a position of static, which is the default value for the CSS property position.

Question 23

What are the four box offset properties?

Answer 23

Top, bottom, left, and right.

Question 24

What are the four components of “the Cascade”.

Answer 24

The four components of “the Cascade” are; last rule, specificity, importance, and inheritance.

Question 25

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

Answer 25

The term “source order” refers to the order in which styling is applied in CSS.

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

This is possible because of inheritance.

Question 27

List the three selector types in order of increasing specificity.

Answer 27

Three selector types in order of increasing specificity are; *, h1, p#intro

Question 28

Why is using !important considered bad practice?

Answer 28

It breaks the natural cascade and makes debugging harder

Question 29

What does the transform property do?

Answer 29

It modifies the coordinate space of the CSS visual formatting model.

Question 30

Give four examples of CSS transform functions.

Answer 30

Four CSS transform functions are; rotate, scale, skew, and translate.

Question 31

The transition property is shorthand for which four CSS properties?

Answer 31

It is a shorthand for; 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

Height and width of the viewport

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

In responsive design, a breakpoint is the “point” at which a website’s content and design will adapt in a certain way in order to provide the best possible user experience.

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

The advantage is consistency in display across devices.

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 last rule principle of the CSS cascade.