Question 1

Setting one column width

You may use predefined grid classes (as shown below), grid mixins, or inline widths. Note that the other columns will resize no matter the width of the center column.

Accepted Answer

True

Question 2

Equal-width multi-row

Create equal-width columns that span multiple rows by inserting a .w-100 where you want the columns to break to a new line. Make the breaks responsive by mixing the .w-100 with some responsive display utilities.

Accepted Answer

True

Question 3

The padding is then counteracted on the cols with negative margins. This way, all the content in your columns is visually aligned down the left side.

Accepted Answer

False

Question 4

Thanks to flexbox, grid columns without a specified width will automatically layout as equal width columns. For example, four instances of .col-sm will each automatically be 25% wide from the small breakpoint and up.

Accepted Answer

True

Question 5

Responsive classes

Bootstrap’s grid includes five tiers of predefined classes for building complex responsive layouts. Customize the size of your columns on extra small, small, medium, large, or extra large devices however you see fit.

Accepted Answer

True

Question 6

Mix and match

Don’t want your columns to simply stack in some grid tiers? Use a combination of different classes for each tier as needed. See the example below for a better idea of how it all works.

Accepted Answer

True

Question 7

Rows are non-wrappers for columns.

Accepted Answer

False

Question 8

Column widths are set in percentages, so they’re always fluid and sized relative to their parent element.

Accepted Answer

True

Question 9

To make the grid responsive, there are six grid breakpoints, one for each responsive breakpoint: all breakpoints (extra small), small, medium, large, and extra large.

Accepted Answer

False

Question 10

Equal-width

For example, here are two grid layouts that apply to every device and viewport, from xs to xl. Add any number of unit-less classes for each breakpoint you need and every column will be the same width.

Accepted Answer

True

Question 11

Responsive breakpoints

Since Bootstrap is developed to be mobile first, we use a handful of media queries to create sensible breakpoints for our layouts and interfaces.

Accepted Answer

True

Question 12

Button group

Group a series of buttons together on a single line with the button group, and super-power them with JavaScript.

Accepted Answer

True

Question 13

Fluid

Use .container-fluid for a full width container, spanning the entire height of the viewport.

Accepted Answer

False

Question 14

While containers can be nested, most layouts do not require a nested container.

Accepted Answer

True

Question 15

Reboot

A collection of element-specific CSS changes in a single file, kickstart Bootstrap to provide an elegant, consistent, and simple baseline to build upon.

Accepted Answer

True

Question 16

Page defaults The and elements are updated to provide better page-wide defaults.

Accepted Answer

True

Question 17

Construction are the most basic layout element in Bootstrap and are required when using our default grid system.

Accepted Answer

False

Question 18

All-in-one

Our default .container class is a non-responsive, fixed-width container, meaning its max-width changes at each breakpoint

Accepted Answer

False

Question 19

Clearfix

Quickly and easily clear floated content within a container by adding a clearfix utility.

Accepted Answer

True

Question 20

Buttons

Use Bootstrap’s custom button styles for actions in forms, dialogs, and more with support for multiple sizes, states, and more.

Accepted Answer

True

Question 21

No gutters

The gutters between columns in our predefined grid classes can be removed with .no-gutters. This removes the negative margins from .row and the horizontal padding from all immediate children columns.

Accepted Answer

True

Question 22

Alignment

Use flexbox alignment utilities to vertically and horizontally align columns.

Accepted Answer

True

Question 23

Grid System, use our powerful Mobile-first flexbox grid to build layouts of all shapes and sizes.

Accepted Answer

True

Question 24

Be aware of the limitations and bugs around flexbox, like the inability to use some HTML elements as flex containers.

Accepted Answer

True

Question 25

Containers provide a means to vertically and horizontally pad your site’s contents.

Accepted Answer

False

Question 26

While Bootstrap uses ems or rems for defining most sizes, pxs are used for grid breakpoints and container widths. This is because the viewport width is in pixels and does not change with the font size.

Accepted Answer

False

Question 27

Grid breakpoints are based on minimum width media queries, meaning they apply to that one breakpoint and all those above it (e.g., .col-sm-4 applies to small, medium, large, and extra large devices, but not the first xs breakpoint).

Accepted Answer

True

Question 28

Across Bootstrap, you’ll see this most clearly in our media queries. In most cases, we use min-width queries that begin to apply at a specific breakpoint and carry up through the higher breakpoints.

Accepted Answer

True

Question 29

Approach

Additional styling is done only with classes. For example, we reboot some <table> styles for a simpler baseline and later provide  .table, .table-bordered, and more.

Accepted Answer

True

Question 30

Modifier classes should only be used when there are multiple properties or values to be changed across multiple variants.

Accepted Answer

True

Question 31

Bootstrap’s responsive styles are built to be responsive, an approach that’s often referred to as mobile-first. We use this term in our docs and largely agree with it, but at times it can be too broad.

Accepted Answer

True

Question 32

Responsive do not allows you to specify a class that is 100% wide until the specified breakpoint is reached, after which we apply max-widths for each of the higher breakpoints.

Accepted Answer

True

Question 33

While containers can be nested, most layouts do  require a nested container.

Accepted Answer

False

Question 34

Borders

Use border utilities to quickly style the border and border-radius of an element. Great for images, buttons, or any other element.

Accepted Answer

True

Question 35

Containers are the most basic layout element in Bootstrap and are required when using our default grid system.

Accepted Answer

True

Question 36

Variables and maps determine the number of columns, the gutter width, and the media query point at which to begin floating columns. We use these to generate the predefined grid classes documented above, as well as for the custom mixins listed below.

Accepted Answer

True

Question 37

Variable width content

Use col-{breakpoint}-auto classes to size columns based on the natural width of their content.

Accepted Answer

True

Question 38

Margin utilities

With the move to flexbox in v4, you can use margin utilities like .mr-auto to force sibling columns away from one another.

Accepted Answer

True

Question 39

Bootstrap’s grid system uses a series of containers, rows, and columns to layout and align content.

Accepted Answer

True

Question 40

The padding is then counteracted on the rows with negative margins. This way, all the content in your columns is visually aligned down the left side.

Accepted Answer

True

Question 41

Offset classes

Move columns to the right using .offset-md-* classes. These classes increase the left margin of a column by * columns. For example, .offset-md-4 moves .col-md-4 over four columns.

Accepted Answer

True

Question 42

Several Bootstrap components utilize z-index, the CSS property that helps control layout by providing a third axis to arrange content.

Accepted Answer

True

Question 43

Z-index

We don’t encourage customization of these individual values; should you change one, you likely need to change them all.

Accepted Answer

True

Question 44

Responsive breakpoints

Since Bootstrap is developed to be Desktop first, we use a handful of media queries to create sensible breakpoints for our layouts and interfaces.

Accepted Answer

False

Question 45

All-in-one

Our default .container class is a responsive, fixed-width container, meaning its max-width changes at each breakpoint.

Accepted Answer

True

Question 46

Bootstrap comes with four different containers.

Accepted Answer

False

Question 47

Approach

Learn about the guiding principles, strategies, and techniques used to build and maintain Bootstrap so you can more easily customize and extend it yourself.

Accepted Answer

True

Question 48

Use .container for a responsive pixel width or .container-fluid for width: 100% across all viewport and device sizes.

Accepted Answer

True

Question 49

Customizing the grid

Using our built-in grid Sass variables and maps, it’s possible to completely customize the predefined grid classes. Change the number of tiers, the media query dimensions, and the container widths—then recompile.

Accepted Answer

True

Question 50

Bootstrap comes with three different containers.

Accepted Answer

True

Question 51

Alerts

Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages.

Accepted Answer

True

Question 52

Bootstrap primarily uses the following media query ranges or breakpoints in our source Sass files for our layout, grid system, and components.

Accepted Answer

True

Question 53

Breadcrumb

Indicate the current page’s location within a navigational hierarchy that automatically adds separators via CSS.

Accepted Answer

True

Question 54

The box-sizing is globally set on every element—including *::before and *::after, to border-box. This ensures that the declared width of element is never exceeded due to padding or border.

Accepted Answer

True

Question 55

Setting one column width

Auto-layout for flexbox grid columns also means you can set the width of one column and have the sibling columns automatically resize around it.

Accepted Answer

True

Question 56

All breakpoints

For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes. Specify a numbered class when you need a particularly sized column; otherwise, feel free to stick to .col.

Accepted Answer

True

Question 57

Offsetting columns
You can offset grid columns in two ways: our responsive .offset- grid classes and our margin utilities. Grid classes are sized to match columns while margins are more useful for quick layouts where the width of the offset is variable.

Accepted Answer

True

Question 58

Bootstrap’s grid system uses an array of containers, rows, and columns to layout and align content.

Accepted Answer

False

Question 59

Sass mixins
When using Bootstrap’s source Sass files, you have the option of using Sass variables and mixins to create custom, semantic, and responsive page layouts.

Accepted Answer

True

Question 60

To make the grid responsive, there are five grid breakpoints, one for each responsive breakpoint: all breakpoints (extra small), small, medium, large, and extra large.

Accepted Answer

True

Question 61

In a grid layout, content must be placed within columns and only columns may be immediate children of rows.

Accepted Answer

True

Question 62

Z-index

These higher values start at an arbitrary number, high and specific enough to ideally avoid conflicts. We need a standard set of these across our layered components—tooltips, popovers, navbars, dropdowns, modals.

Accepted Answer

True

Question 63

Construction are used to contain, pad, and (sometimes) center the content within them.

Accepted Answer

False

Question 64

Fluid

Use .container-fluid for a full width container, spanning the entire width of the viewport.

Accepted Answer

True

Question

Question

Question

IT0043 MOD 4

Reviewer

Question	Answer
Setting one column width You may use predefined grid classes (as shown below), grid mixins, or inline widths. Note that the other columns will resize no matter the width of the center column.	True
Equal-width multi-row Create equal-width columns that span multiple rows by inserting a .w-100 where you want the columns to break to a new line. Make the breaks responsive by mixing the .w-100 with some responsive display utilities.	True
The padding is then counteracted on the cols with negative margins. This way, all the content in your columns is visually aligned down the left side.	False
Thanks to flexbox, grid columns without a specified width will automatically layout as equal width columns. For example, four instances of .col-sm will each automatically be 25% wide from the small breakpoint and up.	True
Responsive classes Bootstrap’s grid includes five tiers of predefined classes for building complex responsive layouts. Customize the size of your columns on extra small, small, medium, large, or extra large devices however you see fit.	True
Mix and match Don’t want your columns to simply stack in some grid tiers? Use a combination of different classes for each tier as needed. See the example below for a better idea of how it all works.	True
Rows are non-wrappers for columns.	False
Column widths are set in percentages, so they’re always fluid and sized relative to their parent element.	True
To make the grid responsive, there are six grid breakpoints, one for each responsive breakpoint: all breakpoints (extra small), small, medium, large, and extra large.	False
Equal-width For example, here are two grid layouts that apply to every device and viewport, from xs to xl. Add any number of unit-less classes for each breakpoint you need and every column will be the same width.	True
Responsive breakpoints Since Bootstrap is developed to be mobile first, we use a handful of media queries to create sensible breakpoints for our layouts and interfaces.	True
Button group Group a series of buttons together on a single line with the button group, and super-power them with JavaScript.	True
Fluid Use .container-fluid for a full width container, spanning the entire height of the viewport.	False
While containers can be nested, most layouts do not require a nested container.	True
Reboot A collection of element-specific CSS changes in a single file, kickstart Bootstrap to provide an elegant, consistent, and simple baseline to build upon.	True
Page defaults The <html> and <body> elements are updated to provide better page-wide defaults.	True
Construction are the most basic layout element in Bootstrap and are required when using our default grid system.	False
All-in-one Our default .container class is a non-responsive, fixed-width container, meaning its max-width changes at each breakpoint	False
Clearfix Quickly and easily clear floated content within a container by adding a clearfix utility.	True
Buttons Use Bootstrap’s custom button styles for actions in forms, dialogs, and more with support for multiple sizes, states, and more.	True
No gutters The gutters between columns in our predefined grid classes can be removed with .no-gutters. This removes the negative margins from .row and the horizontal padding from all immediate children columns.	True
Alignment Use flexbox alignment utilities to vertically and horizontally align columns.	True
Grid System, use our powerful Mobile-first flexbox grid to build layouts of all shapes and sizes.	True
Be aware of the limitations and bugs around flexbox, like the inability to use some HTML elements as flex containers.	True
Containers provide a means to vertically and horizontally pad your site’s contents.	False
While Bootstrap uses ems or rems for defining most sizes, pxs are used for grid breakpoints and container widths. This is because the viewport width is in pixels and does not change with the font size.	False
Grid breakpoints are based on minimum width media queries, meaning they apply to that one breakpoint and all those above it (e.g., .col-sm-4 applies to small, medium, large, and extra large devices, but not the first xs breakpoint).	True
Across Bootstrap, you’ll see this most clearly in our media queries. In most cases, we use min-width queries that begin to apply at a specific breakpoint and carry up through the higher breakpoints.	True
Approach Additional styling is done only with classes. For example, we reboot some <table> styles for a simpler baseline and later provide .table, .table-bordered, and more.	True
Modifier classes should only be used when there are multiple properties or values to be changed across multiple variants.	True
Bootstrap’s responsive styles are built to be responsive, an approach that’s often referred to as mobile-first. We use this term in our docs and largely agree with it, but at times it can be too broad.	True
Responsive do not allows you to specify a class that is 100% wide until the specified breakpoint is reached, after which we apply max-widths for each of the higher breakpoints.	True
While containers can be nested, most layouts do require a nested container.	False
Borders Use border utilities to quickly style the border and border-radius of an element. Great for images, buttons, or any other element.	True
Containers are the most basic layout element in Bootstrap and are required when using our default grid system.	True
Variables and maps determine the number of columns, the gutter width, and the media query point at which to begin floating columns. We use these to generate the predefined grid classes documented above, as well as for the custom mixins listed below.	True
Variable width content Use col-{breakpoint}-auto classes to size columns based on the natural width of their content.	True
Margin utilities With the move to flexbox in v4, you can use margin utilities like .mr-auto to force sibling columns away from one another.	True
Bootstrap’s grid system uses a series of containers, rows, and columns to layout and align content.	True
The padding is then counteracted on the rows with negative margins. This way, all the content in your columns is visually aligned down the left side.	True
Offset classes Move columns to the right using .offset-md-* classes. These classes increase the left margin of a column by * columns. For example, .offset-md-4 moves .col-md-4 over four columns.	True
Several Bootstrap components utilize z-index, the CSS property that helps control layout by providing a third axis to arrange content.	True
Z-index We don’t encourage customization of these individual values; should you change one, you likely need to change them all.	True
Responsive breakpoints Since Bootstrap is developed to be Desktop first, we use a handful of media queries to create sensible breakpoints for our layouts and interfaces.	False
All-in-one Our default .container class is a responsive, fixed-width container, meaning its max-width changes at each breakpoint.	True
Bootstrap comes with four different containers.	False
Approach Learn about the guiding principles, strategies, and techniques used to build and maintain Bootstrap so you can more easily customize and extend it yourself.	True
Use .container for a responsive pixel width or .container-fluid for width: 100% across all viewport and device sizes.	True
Customizing the grid Using our built-in grid Sass variables and maps, it’s possible to completely customize the predefined grid classes. Change the number of tiers, the media query dimensions, and the container widths—then recompile.	True
Bootstrap comes with three different containers.	True
Alerts Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages.	True
Bootstrap primarily uses the following media query ranges or breakpoints in our source Sass files for our layout, grid system, and components.	True
Breadcrumb Indicate the current page’s location within a navigational hierarchy that automatically adds separators via CSS.	True
The box-sizing is globally set on every element—including ::before and ::after, to border-box. This ensures that the declared width of element is never exceeded due to padding or border.	True
Setting one column width Auto-layout for flexbox grid columns also means you can set the width of one column and have the sibling columns automatically resize around it.	True
All breakpoints For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes. Specify a numbered class when you need a particularly sized column; otherwise, feel free to stick to .col.	True
Offsetting columns You can offset grid columns in two ways: our responsive .offset- grid classes and our margin utilities. Grid classes are sized to match columns while margins are more useful for quick layouts where the width of the offset is variable.	True
Bootstrap’s grid system uses an array of containers, rows, and columns to layout and align content.	False
Sass mixins When using Bootstrap’s source Sass files, you have the option of using Sass variables and mixins to create custom, semantic, and responsive page layouts.	True
To make the grid responsive, there are five grid breakpoints, one for each responsive breakpoint: all breakpoints (extra small), small, medium, large, and extra large.	True
In a grid layout, content must be placed within columns and only columns may be immediate children of rows.	True
Z-index These higher values start at an arbitrary number, high and specific enough to ideally avoid conflicts. We need a standard set of these across our layered components—tooltips, popovers, navbars, dropdowns, modals.	True
Construction are used to contain, pad, and (sometimes) center the content within them.	False
Fluid Use .container-fluid for a full width container, spanning the entire width of the viewport.	True
Construction and options for laying out your Bootstrap project, including wrapping containers, a powerful grid system, a flexible media object, and responsive utility classes.	False
Badges Documentation and examples for badges, our small count and labeling component.	True
Responsive containers are new in Bootstrap v4.4.	True
Rows are wrappers for columns.	True
Column breaks Breaking columns to a new line in flexbox requires a small hack: add an element with width: 100% wherever you want to wrap your columns to a new line.	True
Nesting To nest your content with the default grid, add a new .row and set of .col-sm-* columns within an existing .col-sm-* column.	True
Approach Reboot builds upon Normalize, providing many HTML elements with somewhat opinionated styles using only element selectors.	True
The <body> also sets a global font-family, line-height, and text-align. This is inherited later by some form elements to prevent font inconsistencies.	True
Various form elements have been rebooted for simpler base styles.	True

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