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HTMLmarkup~20 mins

Linking to sections using IDs in HTML - Practice Problems & Coding Challenges

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Challenge - 5 Problems
🎖️
Section Link Master
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Test your skills under time pressure!
❓ rendering
intermediate
2:00remaining
What happens when you click this link?
Given the HTML below, what will the browser do when the user clicks the link labeled Go to Section 2?
HTML
<nav>
  <a href="#section2">Go to Section 2</a>
</nav>
<main>
  <section id="section1">
    <h2>Section 1</h2>
    <p>Welcome to section one.</p>
  </section>
  <section id="section2">
    <h2>Section 2</h2>
    <p>This is the second section.</p>
  </section>
</main>
AThe page reloads and shows Section 1 at the top.
BThe page scrolls to the top of Section 2.
CNothing happens because the link is broken.
DThe browser opens a new tab with Section 2 content.
Attempts:
2 left
💡 Hint
Look at the href attribute and the id attributes of the sections.
📝 Syntax
intermediate
2:00remaining
Which anchor tag correctly links to the section with id="contact"?
Choose the correct anchor tag that links to the section with id="contact".
A<a href="section#contact">Contact Us</a>
B<a href="contact">Contact Us</a>
C<a href="#contact">Contact Us</a>
D<a href="/contact">Contact Us</a>
Attempts:
2 left
💡 Hint
Links to sections on the same page use a hash (#) followed by the id.
❓ selector
advanced
2:00remaining
Which CSS selector targets the section linked by <a href="#about">?
You have a link <a href="#about">About</a>. Which CSS selector will style the section it links to?
Asection[href="#about"]
Ba[href="#about"]
C#about a
Dsection#about
Attempts:
2 left
💡 Hint
The link points to an element with id="about". How do you select an element by id?
❓ layout
advanced
2:00remaining
How to keep the linked section visible below a fixed header?
You have a fixed header 60px tall. When clicking a link to a section with an ID, the section's top is hidden behind the header. How can you fix this so the section content is fully visible below the header?
AAdd padding-top: 60px and margin-top: -60px to the section with the ID.
BAdd margin-bottom: 60px to the section with the ID.
CAdd padding-bottom: 60px to the fixed header.
DAdd margin-top: 60px to the fixed header.
Attempts:
2 left
💡 Hint
Think about shifting the section content down without changing layout flow.
❓ accessibility
expert
2:00remaining
What ARIA attribute improves accessibility for links to page sections?
When linking to a section on the same page using an anchor with href="#sectionID", which ARIA attribute helps screen readers understand the link's purpose better?
Aaria-label="Jump to Section"
Baria-hidden="true"
Caria-live="polite"
Daria-disabled="true"
Attempts:
2 left
💡 Hint
Think about how to describe the link clearly for screen readers.

Practice

(1/5)
1. What is the purpose of the id attribute in HTML when linking to sections?
easy
A. It hides the section from the page.
B. It styles the section with a unique color automatically.
C. It marks a section so you can link directly to it using an anchor.
D. It creates a new page in the browser.

Solution

  1. Step 1: Understand the role of the id attribute

    The id attribute uniquely identifies an element on the page.

  2. Step 2: Linking to sections using id

    Links with href="#id" jump directly to the element with that id.

  3. Final Answer:

    It marks a section so you can link directly to it using an anchor. -> Option C

  4. Quick Check:

    id marks section for linking [OK]
Hint: Use id to name sections for direct links [OK]
Common Mistakes:
  • Thinking id changes style automatically
  • Confusing id with class
  • Believing id creates new pages
2. Which of the following is the correct syntax to link to a section with id="contact"?
easy
A. <a href="#contact">Contact</a>
B. <a link="#contact">Contact</a>
C. <a id="contact">Contact</a>
D. <a href="contact">Contact</a>

Solution

  1. Step 1: Identify how to link to an id

    Links to sections use href="#id" where id is the target's identifier.

  2. Step 2: Check each option's syntax

    <a href="#contact">Contact</a> uses href="#contact", which is correct. Others miss the # or use wrong attributes.

  3. Final Answer:

    <a href="#contact">Contact</a> -> Option A

  4. Quick Check:

    Link uses href="#id" [OK]
Hint: Use # before id in href to link sections [OK]
Common Mistakes:
  • Omitting the # in href
  • Using id attribute inside <a> instead of href
  • Using non-standard attributes like link
3. Given this HTML snippet, what happens when the user clicks the link?
<a href="#about">About Us</a>
...
<section id="about">
  <h2>About Our Company</h2>
  <p>We build websites.</p>
</section>
medium
A. Nothing happens because the link is broken.
B. The page scrolls to the section with heading 'About Our Company'.
C. The browser opens a new tab with the 'about' page.
D. The page reloads to the top.

Solution

  1. Step 1: Understand the link's href attribute

    The link uses href="#about", which targets the element with id="about".

  2. Step 2: Describe browser behavior on clicking such a link

    The browser scrolls smoothly to the element with that id, showing the 'About Our Company' section.

  3. Final Answer:

    The page scrolls to the section with heading 'About Our Company'. -> Option B

  4. Quick Check:

    href="#id" scrolls to that section [OK]
Hint: Clicking href="#id" scrolls to that section [OK]
Common Mistakes:
  • Thinking it opens a new page
  • Assuming the link does nothing
  • Believing it reloads the page
4. What is wrong with this code if the link does not jump to the section?
<a href="#services">Our Services</a>
...
<section id="service">
  <h2>Services Offered</h2>
</section>
medium
A. The href attribute should not have a #.
B. The link text must match the section heading exactly.
C. The section tag cannot have an id.
D. The id in the section does not match the href value.

Solution

  1. Step 1: Compare href and id values

    The link uses href="#services" but the section has id="service" (missing 's').

  2. Step 2: Understand matching requirement

    For the link to work, the href must exactly match the target element's id.

  3. Final Answer:

    The id in the section does not match the href value. -> Option D

  4. Quick Check:

    href and id must match exactly [OK]
Hint: Check href and id spellings match exactly [OK]
Common Mistakes:
  • Forgetting the # in href
  • Using wrong or mismatched id names
  • Thinking link text affects the jump
5. You want to create a navigation menu that links to three sections: Home, About, and Contact. Which HTML snippet correctly sets up the links and sections using IDs?
hard
A. 
<nav>
  <a href="#home">Home</a>
  <a href="#about">About</a>
  <a href="#contact">Contact</a>
</nav>

<section id="home">Welcome!</section>
<section id="about">About us info</section>
<section id="contact">Contact details</section>
B. 
<nav>
  <a href="home">Home</a>
  <a href="about">About</a>
  <a href="contact">Contact</a>
</nav>

<section id="home">Welcome!</section>
<section id="about">About us info</section>
<section id="contact">Contact details</section>
C. 
<nav>
  <a href="#home">Home</a>
  <a href="#about">About</a>
  <a href="#contact">Contact</a>
</nav>

<section id="home-section">Welcome!</section>
<section id="about-section">About us info</section>
<section id="contact-section">Contact details</section>
D. 
<nav>
  <a href="#home">Home</a>
  <a href="#about">About</a>
  <a href="#contact">Contact</a>
</nav>

<section id="home">Welcome!</section>
<section id="about">About us info</section>
<section>Contact details</section>

Solution

  1. Step 1: Check href values in navigation links

    Links use href="#home", href="#about", and href="#contact" which is correct syntax to link to IDs.

  2. Step 2: Verify matching section IDs

    Sections have matching id="home", id="about", and id="contact" exactly matching the href targets.

  3. Final Answer:

    Option A correctly links navigation anchors to matching section IDs. -> Option A

  4. Quick Check:

    Matching href="#id" and section id [OK]
Hint: Match href="#id" exactly with section id [OK]
Common Mistakes:
  • Omitting # in href
  • Mismatching href and id names
  • Missing id attribute on sections
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