Get certified in mobile sites Assessment Answers – Academy for Ads

• J1.

• What webpage metric is a score based on the average time at which visible parts of the page are displayed?

  1.   Speed Index
  2.   Total requests
  3.   Page weight
  4.   Request weight

   

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• M2.

• What is a common cause of mobile user frustration and, frequently, site abandonment?

  1.   Slow mobile page load speed
  2.   Mobile site search functionality
  3.   Location trackers
  4.   Simple site navigation

   

• F3.

• Roger is your typical mobile site user. He loves mobile sites, but is extremely frustrated by what behavior?

  1.   Sites that require him to zoom in and out
  2.   Sites that only use mobile optimized pages
  3.   Sites that ask for his location and make clear why they are requesting it
  4.   Sites that let him choose between a “desktop site” and a “mobile site”

   

• B4.

• Which of the following is a feature enabled by the Service Worker API?

  +1 

  1.   Enabling a Progressive Web App to synchronize with the server and send push messages in the background
  2.   Enabling a Progressive Web App to run JavaScript files more efficiently
  3.   Enabling a Progressive Web App to access most common mobile OS services, such as volume controls, screen brightness, and voice recording
  4.   Enabling a Progressive Web App to run asynchronously with other Progressive Web Apps

 

• D5.

• Jessica is analyzing the results of the A/B test for her redesign of the DinoWorld mobile site. The bounce rate for one particular mobile device is significantly higher than all the rest. What does this indicate?

  +0 / 1 

  1.   The site may not function correctly on that device.
  2.   The device attracts users who may not like DinoWorld.
  3.   The device’s users require a high level of personalization.
  4.   The device’s users require a smaller, less prominent search bar.

  The correct answer was The site may not function correctly on that device..

   

• F6.

• How can you design your website’s menus to optimize the experience for mobile users?

  +1 

  1.   Prioritize and display the fewest possible options.
  2.   Be comprehensive and display as many options as possible.
  3.   Display the least-used menu options.
  4.   Only include options that link to your promotions.

 

• E7.

• To reduce the frustration of mobile users in filling out a registration form, Roger from Sports Gear makes what kind of optimization to his mobile form?

  +1 

  1.   Perform validation on input fields in real-time.
  2.   Validation is performed after the form is submitted.
  3.   As many free-form text entry fields as possible are used.
  4.   Number entry fields always use the full keyboard.

 

• L8.

• Which term describes the stage in which the browser relates interpreted HTML and CSS documents to display a webpage?

  +0 / 1 

  1.   The render tree
  2.   The Document Object Model (DOM)
  3.   The CSS Object Model (CSSOM)
  4.   Parsing

  The correct answer was The render tree.

   

• K9.

• A webpage appears to hang for several seconds before anything appears on screen. Which of the following steps is likely to help reduce load times?

  +0 / 1 

  1.   Set inessential script files to load after the page body.
  2.   Place image and script files close together in the HTML.
  3.   Disable Chrome Developer Tools, as the software can create slowdown in the critical rendering path.
  4.   Elimate any use of JavaScript to “lazy load” files.

  The correct answer was Set inessential script files to load after the page body..

   

• L10.

• What is the most likely indicator of a simple, text-only webpage taking a long time to load, even in optimal network conditions?

  +1 

  1.   The DOMContentLoaded value is five seconds.
  2.   The list of loaded assets is over 10 items long.
  3.   Throttling is set to “WIFI.”
  4.   The timeline shows that a “Recalculate Style” event triggered.

 

• A11.

• A bank is developing a Progressive Web App. Which of the following would be an effective use of push notifications?

  +0 / 1 

  1.   Notify mobile users of a withdrawal over a specified limit.
  2.   Send hourly reminders of new credit card offerings.
  3.   Provide more efficient checkout for mobile users ordering checks and other services.
  4.   Allow mobile users to securely submit credit card information with a single click.

  The correct answer was Notify mobile users of a withdrawal over a specified limit..

   

• I12.

• Which element is removed from a minified HTML file in order to compress data?

  +0 / 1 

  1.   Whitespace
  2.   CSS declarations
  3.   Div tags
  4.   Scripts

  The correct answer was Whitespace.

   

• H13.

• What kinds of images are resolution- and scale-independent?

  +1 

  1.   Vector images
  2.   Raster images
  3.   JPG images
  4.   Large images

 

• G14.

• What is Google’s recommended mobile site design configuration?

  +1 

  1.   Responsive web design
  2.   Dynamic serving
  3.   Separate URLs
  4.   Repetitive web design

 

• C15.

• What AMP tool is a proxy-based content delivery network for delivering all valid AMP documents?

  +0 / 1 

  1.   Google AMP Cache
  2.   Google Cache Checker
  3.   AMP JavaScript library
  4.   Google AMP Validator

  The correct answer was Google AMP Cache.

   

• J16.

• A client reports issues viewing their site on a popular mobile phone, but it appears fine on a different device. What should be your first tool to diagnose this?

  1.   Device emulation
  2.   Explore Impaired networks
  3.   Android test
  4.   Browser test

   

   

• H17.

• To optimize the cache lifetime, what action should you perform?

  1.   Determine the appropriate max-age for each resource.
  2.   Ensure URLs are case sensitive.
  3.   Deliver the resource as a separate file.
  4.   Deliver optimized resources for each browser.

 

• B18.

• A mobile travel agency website is considering developing a Progressive Web App. Which of the following is a potential benefit of a Progressive Web App versus a mobile webpage?

  1.   Customers can quickly make travel bookings even in areas with poor network conditions.
  2.   The travel agency will gain added visibility by placing their Progressive Web App in app stores.
  3.   Push notifications allow the agency to schedule automatic updates, ensuring customers get the latest deals.
  4.   Because Progressive Web Apps support large image and movie files, the agency can better exhibit exotic locations.