Mobile Marketing Mobile-Optimized Web Presence 5 — Questions and Answers
Question 1: What is the recommended minimum contrast ratio for normal text on mobile screens to meet WCAG AA accessibility standards?
- 2.5:1
- 3:1
- 4.5:1 (Correct answer)
- 7:1
Correct answer: 4.5:1
WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text to ensure readability for users with visual impairments.
Question 2: A mobile e-commerce site sees high add-to-cart rates but very low checkout completion. Which mobile-specific issue is most likely to blame?
- Poor product image quality
- A complex, multi-step checkout form not optimized for mobile input (Correct answer)
- Missing product reviews section
- Slow homepage load time
Correct answer: A complex, multi-step checkout form not optimized for mobile input
Long checkout forms with poor input types (no numeric keypad for card numbers, no autocomplete) cause significant abandonment on mobile devices.
Question 3: Which HTML input type attribute should be used for a phone number field to trigger the numeric keypad on mobile devices?
- type='number'
- type='text'
- type='tel' (Correct answer)
- type='numeric'
Correct answer: type='tel'
type='tel' triggers the telephone keypad (including + and # characters) on mobile browsers, which is the correct input type for phone numbers.
Question 4: What is 'mobile-first indexing' as implemented by Google?
- Google ranks mobile apps above mobile websites in search results
- Google primarily uses the mobile version of a site for indexing and ranking (Correct answer)
- Google only indexes sites that have a dedicated mobile URL
- Google gives a ranking bonus to sites with AMP pages
Correct answer: Google primarily uses the mobile version of a site for indexing and ranking
With mobile-first indexing, Google predominantly uses the mobile version of a page's content for indexing and ranking, even for desktop searches.
Question 5: A travel site's mobile page uses large, full-screen video as the hero element. What is the most significant performance risk?
- Videos cannot be rendered on mobile browsers
- Large video files significantly increase page load time and data consumption (Correct answer)
- Autoplay video improves engagement metrics artificially
- Video content is excluded from Google's mobile index
Correct answer: Large video files significantly increase page load time and data consumption
Full-screen hero videos have very large file sizes that dramatically increase load times and consume mobile users' data allowances.
Question 6: Which approach best helps prevent accidental taps on adjacent interactive elements in a mobile navigation menu?
- Using CSS animations on hover states
- Adding sufficient spacing (padding/margin) between clickable items (Correct answer)
- Implementing JavaScript double-tap confirmation
- Reducing the number of menu items to two
Correct answer: Adding sufficient spacing (padding/margin) between clickable items
Adequate padding and margin between interactive elements reduces the risk of accidental taps on the wrong item, especially with larger fingers.
Question 7: When a mobile site implements 'infinite scroll' instead of pagination, what is the primary SEO concern?
- Infinite scroll pages load too slowly for Googlebot to index
- Paginated content deep in the scroll may not be crawled or indexed by search engines (Correct answer)
- Infinite scroll violates Google's mobile usability guidelines
- Googlebot cannot execute the JavaScript required to load more content
Correct answer: Paginated content deep in the scroll may not be crawled or indexed by search engines
Googlebot may not scroll far enough to discover and index all content loaded dynamically via infinite scroll, leaving deep content out of search results.
Mobile Marketing Mobile-Optimized Web Presence 5
What is the recommended minimum contrast ratio for normal text on mobile screens to meet WCAG AA accessibility standards?