Why a grid system matters in Bootsrap - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a Bootstrap container that centers content.

Bootsrap

<div class="[1]">
  <p>Hello, world!</p>
</div>

Drag options to blanks, or click blank then click option'

Acontainer-fluid

Brow

Ccol

Dcontainer

Attempts:

3 left

💡 Hint

Common Mistakes

Using row or col instead of container.

The container class creates a responsive fixed-width container that centers content horizontally.

2fill in blank

medium

Complete the code to create a Bootstrap row that holds columns.

Bootsrap

<div class="container">
  <div class="[1]">
    <div class="col">Column 1</div>
    <div class="col">Column 2</div>
  </div>
</div>

Drag options to blanks, or click blank then click option'

Acontainer-fluid

Bcol

Crow

Dgrid

Attempts:

3 left

💡 Hint

Common Mistakes

Using col instead of row for grouping columns.

The row class groups columns horizontally in Bootstrap's grid system.

3fill in blank

hard

Fix the error in the code to make columns responsive in Bootstrap.

Bootsrap

<div class="container">
  <div class="row">
    <div class="[1]">Column 1</div>
    <div class="col">Column 2</div>
  </div>
</div>

Drag options to blanks, or click blank then click option'

Acol-6

Brow

Ccontainer

Dcol-12

Attempts:

3 left

💡 Hint

Common Mistakes

Using row or container as a column class.

The class col-6 makes the column take half the row width, making it responsive.

4fill in blank

hard

Fill both blanks to create a responsive two-column layout with Bootstrap.

Bootsrap

<div class="container">
  <div class="[1]">
    <div class="[2]">Left</div>
    <div class="col-6">Right</div>
  </div>
</div>

Drag options to blanks, or click blank then click option'

Arow

Bcontainer

Ccol-6

Dcol

Attempts:

3 left

💡 Hint

Common Mistakes

Using container instead of row for grouping columns.

The row class groups columns, and col-6 sets half width for the left column.

5fill in blank

hard

Fill all three blanks to create a responsive grid with three equal columns in Bootstrap.

Bootsrap

<div class="[1]">
  <div class="[2]">
    <div class="[3]">Col 1</div>
    <div class="col">Col 2</div>
    <div class="col">Col 3</div>
  </div>
</div>

Drag options to blanks, or click blank then click option'

Acontainer

Brow

Ccol-4

Dcontainer-fluid

Attempts:

3 left

💡 Hint

Common Mistakes

Using container instead of container-fluid for full width.

container-fluid creates a full-width container, row groups columns, and col-4 sets one-third width for the first column.

Practice

1. Why is a grid system important in Bootstrap for webpage design?

easy

A. It creates pop-up alerts on the page.

B. It helps organize content into neat rows and columns for clarity.

C. It adds animations to buttons.

D. It automatically changes the website's colors.

Solution

1. Step 1: Understand the purpose of a grid system

   A grid system divides the page into rows and columns to arrange content clearly and consistently.

2. Step 2: Identify what Bootstrap's grid system does

   Bootstrap uses this system to help developers create organized, flexible layouts that adapt to screen sizes.

3. Final Answer:

   It helps organize content into neat rows and columns for clarity. -> Option B

4. Quick Check:

   Grid system = organizes content neatly [OK]

Hint: Grid system = neat rows and columns layout [OK]

Common Mistakes:

• Thinking grid changes colors automatically
• Confusing grid with animations or alerts
• Believing grid adds pop-ups

2. Which of the following is the correct Bootstrap class to create a row in the grid system?

easy

A. .row

B. .container-row

C. .grid-row

D. .column-row

Solution

1. Step 1: Recall Bootstrap grid structure

   Bootstrap grid uses .row to group columns horizontally.

2. Step 2: Identify the correct class name

   The official class to create a row is .row, not any other variant.

3. Final Answer:

   .row -> Option A

4. Quick Check:

   Row class = .row [OK]

Hint: Rows use class .row always [OK]

Common Mistakes:

• Using .container-row instead of .row
• Confusing row with column classes
• Adding extra words to class names

3. What will be the layout result of this Bootstrap code?

<div class="row">
  <div class="col-6">Left</div>
  <div class="col-6">Right</div>
</div>

medium

A. One column taking full width, the other hidden.

B. Two columns stacked vertically, each full width.

C. Columns overlap each other in the same space.

D. Two columns side by side, each taking half the width.

Solution

1. Step 1: Understand Bootstrap column classes

   The class col-6 means the column takes 6 out of 12 parts, or half the row width.

2. Step 2: Analyze the two columns inside the row

   Two col-6 columns inside a row will sit side by side, each occupying half the horizontal space.

3. Final Answer:

   Two columns side by side, each taking half the width. -> Option D

4. Quick Check:

   col-6 + col-6 = half + half side by side [OK]

Hint: col-6 means half width side by side [OK]

Common Mistakes:

• Thinking columns stack vertically by default
• Assuming columns overlap
• Believing one column hides the other

4. Identify the error in this Bootstrap grid code:

<div class="row">
  <div class="col-4">One</div>
  <div class="col-5">Two</div>
  <div class="col-5">Three</div>
</div>

medium

A. Column classes must be col-3, col-4, col-5 only.

B. The row class should be col-row instead.

C. The total column widths exceed 12, causing layout issues.

D. Missing container class around the row.

Solution

1. Step 1: Calculate total column widths

   Columns have widths 4 + 5 + 5 = 14, which is more than the 12 units Bootstrap grid allows per row.

2. Step 2: Understand Bootstrap grid limits

   Bootstrap rows should have columns totaling 12 or less to fit properly without wrapping or overflow.

3. Final Answer:

   The total column widths exceed 12, causing layout issues. -> Option C

4. Quick Check:

   Sum of col widths > 12 breaks layout [OK]

Hint: Sum columns ≤ 12 per row [OK]

Common Mistakes:

• Ignoring total column width sum
• Using wrong class names for rows
• Forgetting container is optional but recommended

5. You want a layout with three columns that stack vertically on small screens but sit side by side on medium and larger screens. Which Bootstrap classes achieve this?

hard

A. col-12 col-md-4 for each column

B. col-4 col-md-12 for each column

C. col-6 col-md-6 for each column

D. col-md-12 col-lg-4 for each column

Solution

1. Step 1: Understand responsive classes

   col-12 means full width on extra small screens; col-md-4 means one-third width on medium and larger screens.

2. Step 2: Match requirement to classes

   Using col-12 col-md-4 for each column stacks them vertically on small screens and places them side by side on medium+ screens.

3. Final Answer:

   col-12 col-md-4 for each column -> Option A

4. Quick Check:

   Stack small, side by side medium = col-12 col-md-4 [OK]

Hint: Use col-12 for small, col-md-4 for medium+ [OK]

Common Mistakes:

• Reversing small and medium classes
• Using same column size for all screens
• Not stacking columns on small screens