Background position in CSS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the background image position to the top left corner.

CSS

background-position: [1];

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

Arepeat

Bcenter

Cbottom right

Dtop left

Attempts:

3 left

💡 Hint

Common Mistakes

Using repeat which is for background-repeat, not position.

Using only one keyword like top without the horizontal position.

The background-position property sets the starting position of a background image. top left places it at the top left corner.

2fill in blank

medium

Complete the code to center the background image horizontally and vertically.

CSS

background-position: [1];

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

Abottom left

Btop right

Ccenter center

Dleft center

Attempts:

3 left

💡 Hint

Common Mistakes

Using only one center which defaults the other axis to top or left.

Confusing background-position with background-repeat.

Using center center places the background image exactly in the middle horizontally and vertically.

3fill in blank

hard

Fix the error in the code to correctly position the background image 20 pixels from the left and 10 pixels from the top.

CSS

background-position: [1];

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

A20px 10px

B10px 20px

Cleft 20px top 10px

D20px top 10px

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the pixel values order.

Mixing keywords and pixel values incorrectly.

The first value is the horizontal offset (left to right), so 20px is horizontal and 10px is vertical (top to bottom).

4fill in blank

hard

Fill both blanks to position the background image at the bottom right corner using keywords.

CSS

background-position: [1] [2];

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

Abottom

Bright

Ctop

Dleft

Attempts:

3 left

💡 Hint

Common Mistakes

Reversing the order of horizontal and vertical keywords.

Using top or left instead of right or bottom.

The background-position property accepts two values: horizontal then vertical. right bottom places the image at the bottom right corner.

5fill in blank

hard

Fill all three blanks to position the background image 15 pixels from the left, 25 pixels from the top, and prevent it from repeating.

CSS

background-position: [1] [2]; background-repeat: [3];

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

A15px

B25px

Cno-repeat

Drepeat

Attempts:

3 left

💡 Hint

Common Mistakes

Using repeat instead of no-repeat.

Swapping the pixel values order.

The first two values set the horizontal and vertical position in pixels. The background-repeat property set to no-repeat stops the image from repeating.

Practice

1. What does the CSS property background-position control in a webpage?

easy

A. The border style of the element

B. Where the background image is placed inside an element

C. The color of the background

D. The size of the background image

Solution

1. Step 1: Understand the property purpose

   The background-position property sets the location of the background image inside an element.

2. Step 2: Compare with other properties

   Other properties like background-size control size, and background-color controls color, not position.

3. Final Answer:

   Where the background image is placed inside an element -> Option B

4. Quick Check:

   Background position = image placement [OK]

Hint: Background-position sets image location inside element [OK]

Common Mistakes:

• Confusing background-position with background-size
• Thinking it changes background color
• Assuming it controls element borders

2. Which of the following is the correct syntax to set the background image position to the top right corner?

easy

A. background-position: left bottom;

B. background-position: top left;

C. background-position: right top;

D. background-position: center center;

Solution

1. Step 1: Recall keyword order for background-position

   The correct order is horizontal first, then vertical. So top right is incorrect order.

2. Step 2: Check options carefully

   background-position: top left; uses top left, which is vertical then horizontal, so it is incorrect. background-position: right top; uses right top, which is horizontal then vertical, the correct order.

3. Final Answer:

   background-position: right top; -> Option C

4. Quick Check:

   Horizontal then vertical = right top [OK]

Hint: Write horizontal first, then vertical in background-position [OK]

Common Mistakes:

• Swapping horizontal and vertical keywords
• Using invalid keyword combinations
• Forgetting semicolon at end

3. Given the CSS rule:

div { background-image: url('flower.png'); background-position: 50% 100%; }

Where will the background image appear inside the div?

medium

A. At the bottom right corner

B. At the top left corner

C. Centered both horizontally and vertically

D. Centered horizontally and at the bottom vertically

Solution

1. Step 1: Understand percentage values in background-position

   50% means horizontally centered, 100% means vertically at the bottom edge.

2. Step 2: Match percentages to position

   So the image is horizontally centered and vertically aligned at the bottom inside the div.

3. Final Answer:

   Centered horizontally and at the bottom vertically -> Option D

4. Quick Check:

   50% horizontal + 100% vertical = center bottom [OK]

Hint: Percentages: 50% center, 100% bottom [OK]

Common Mistakes:

• Mixing up horizontal and vertical order
• Assuming 100% means top
• Confusing percentages with pixels

4. Identify the error in this CSS snippet:

section { background-position: 20px 30px 40px; }

medium

A. Too many values for background-position

B. Missing units for values

C. Incorrect property name

D. Background image not specified

Solution

1. Step 1: Check the number of values for background-position

   The property accepts one or two values: horizontal and optional vertical. Here, three values are given, which is invalid.

2. Step 2: Verify other options

   Units are present (px), property name is correct, and background image can be set separately, so those are not errors here.

3. Final Answer:

   Too many values for background-position -> Option A

4. Quick Check:

   background-position accepts max 2 values [OK]

Hint: Use max two values: horizontal and vertical [OK]

Common Mistakes:

• Adding extra values beyond two
• Forgetting units on length values
• Confusing property names

5. You want a background image to appear exactly 10px from the left and 20% from the top inside a container. Which CSS rule correctly sets this?

hard

A. background-position: 10px 20%;

B. background-position: 20% 10px;

C. background-position: left 10px top 20%;

D. background-position: 10% 20px;

Solution

1. Step 1: Understand order of values in background-position

   The first value is horizontal (left to right), the second is vertical (top to bottom).

2. Step 2: Match values to desired position

   10px from left means horizontal = 10px; 20% from top means vertical = 20%. So background-position: 10px 20%; is correct.

3. Final Answer:

   background-position: 10px 20%; -> Option A

4. Quick Check:

   Horizontal then vertical = 10px 20% [OK]

Hint: Horizontal first, vertical second in background-position [OK]

Common Mistakes:

• Swapping horizontal and vertical values
• Using wrong units for values
• Adding keywords incorrectly