Image tag usage in HTML - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is the purpose of the alt attribute in an tag?

Why should you always include the alt attribute in an <img> tag?

A It adds a border around the image for styling purposes.

B It provides alternative text for screen readers and shows text if the image fails to load.

C It links the image to another webpage when clicked.

D It changes the image size automatically based on screen width.

💡 Hint

Think about accessibility and what happens if the image cannot be displayed.

The alt attribute describes the image for people using screen readers and shows text if the image cannot load.

📝 Syntax

intermediate

Which tag is correctly written to display an image?

Choose the correct <img> tag syntax that will display an image located at "images/photo.jpg" with alt text "A photo".

A <img src="images/photo.jpg" alt="A photo">

B <img href="images/photo.jpg" alt="A photo">

C <img src="images/photo.jpg" alt=>

D <img src="images/photo.jpg" alt="">

💡 Hint

Remember the attribute that specifies the image file location is src.

The src attribute points to the image file. The alt attribute must have a value describing the image.

❓ rendering

advanced

What will the browser display for this image tag?

Given this HTML code:

<img src="missing.jpg" alt="Missing image">

What will the browser show if the file "missing.jpg" does not exist?

A The browser will display a broken image icon with no text.

B Nothing will be shown; the image area will be blank.

C The browser will crash or freeze.

D The text "Missing image" will be shown where the image should be.

💡 Hint

Think about what the alt text is for when the image cannot load.

If the image file is missing, the browser shows the alt text so users understand what was meant to be there.

❓ selector

advanced

Which CSS selector targets all images inside a

element?

You want to style all <img> tags that are inside any <section> element. Which CSS selector should you use?

A section img

B img > section

C section > img

D img.section

💡 Hint

Think about how to select elements nested inside another element.

The selector section img selects all img elements inside any section, at any depth.

❓ accessibility

expert

Which practice improves accessibility for decorative images?

You have an image used only for decoration and it adds no information. How should you write the <img> tag to improve accessibility?

A <img src="decorative.png" aria-hidden="false">

B <img src="decorative.png">

C <img src="decorative.png" alt="">

D <img src="decorative.png" alt="decorative image">

💡 Hint

Think about how screen readers treat empty alt attributes.

An empty alt attribute tells screen readers to ignore the image, which is best for purely decorative images.

Practice

1. What is the main purpose of the <img> tag in HTML?

easy

A. To style the webpage

B. To create links to other pages

C. To add text content

D. To display images on a webpage

Solution

1. Step 1: Understand the role of the <img> tag

   The <img> tag is specifically designed to add pictures to a webpage.

2. Step 2: Compare with other options

   Other tags like <a> create links, <p> add text, and CSS styles the page, so they are not correct here.

3. Final Answer:

   To display images on a webpage -> Option D

4. Quick Check:

   <img> tag = display images [OK]

Hint: Remember: <img> always shows pictures [OK]

Common Mistakes:

• Confusing <img> with <a> for links
• Thinking <img> adds text
• Assuming <img> styles content

2. Which of the following is the correct syntax to add an image with source "photo.jpg" and alternative text "A photo"?

easy

A.

B.

C.

D.

Solution

1. Step 1: Check the tag and attributes

   The correct tag is <img> with attributes src for source and alt for alternative text.

2. Step 2: Identify incorrect attributes or tags

   <image> is not a valid tag, href is for links, and title is not the alt text.

3. Final Answer:

   <img src="photo.jpg" alt="A photo"> -> Option A

4. Quick Check:

   Use src and alt in <img> [OK]

Hint: Use src for image path and alt for description [OK]

Common Mistakes:

• Using <image> instead of <img>
• Using href instead of src
• Confusing alt with title attribute

3. What will the browser display when rendering this HTML?

<img src="flower.png" alt="A red flower">

medium

A. The text 'A red flower' instead of an image

B. Nothing, because alt text is missing

C. The image file named flower.png if it exists, otherwise a broken image icon

D. An error message on the page

Solution

1. Step 1: Understand how the browser uses src and alt

   The browser tries to load the image from the src path. If it succeeds, it shows the image.

2. Step 2: Role of alt attribute

   If the image cannot load, the alt text is shown as a fallback. No error message appears on the page.

3. Final Answer:

   The image file named flower.png if it exists, otherwise a broken image icon -> Option C

4. Quick Check:

   Image shows if src works, alt shows if not [OK]

Hint: Image shows if src valid; alt shows if image missing [OK]

Common Mistakes:

• Thinking alt text always shows instead of image
• Expecting error messages on page
• Assuming missing alt means no display

4. Identify the error in this image tag:

<img src='cat.jpg' alt=Cat Picture>

medium

A. Incorrect tag name, should be <image>

B. Missing quotes around the alt attribute value

C. src attribute should be alt

D. alt attribute is not needed

Solution

1. Step 1: Check attribute syntax

   HTML attributes with spaces in values must be quoted. alt=Cat Picture lacks quotes around 'Cat Picture'.

2. Step 2: Verify tag and attributes

   The tag <img> is correct, src is correct, and alt is needed for accessibility.

3. Final Answer:

   Missing quotes around the alt attribute value -> Option B

4. Quick Check:

   Attribute values with spaces need quotes [OK]

Hint: Always quote attribute values with spaces [OK]

Common Mistakes:

• Leaving out quotes for multi-word alt text
• Using <image> instead of <img>
• Removing alt attribute entirely

5. You want to add an image that is decorative only and should be ignored by screen readers. Which is the best way to write the <img> tag?

hard

A.

B.

C.

D.

Solution

1. Step 1: Understand accessibility for decorative images

   Decorative images should have an empty alt attribute (alt="") so screen readers skip them.

2. Step 2: Analyze other options

   Omitting alt means screen readers may read the file name; descriptive alt text is for meaningful images; aria-hidden="false" means not hidden.

3. Final Answer:

   <img src="decorative.png" alt=""> -> Option A

4. Quick Check:

   Empty alt hides decorative images from screen readers [OK]

Hint: Use alt="" for decorative images to hide from screen readers [OK]

Common Mistakes:

• Omitting alt attribute entirely
• Adding descriptive alt for decorative images
• Using aria-hidden="false" instead of true