Mobile sites certification answers 2018

1. Which is true about calls-to-action usage on mobile homepages?

   A call-to-action should be used in menus only
   A call-to-action should be on the second pag
   A call-to-action should be prominent on the visible area of the mobile homepage
   The same call-to-action should be used both on mobile and desktop sites

2. Currently, Google Optimize does NOT currently allow you to:

   test new website designs, layouts and content with a subset of your visitors
   use your existing goals and metrics in Google Analytics as experiment objectives
   do heatmap analysis to better understand to user behaviour on your site
   serve experiments to specific groups of users that you’ve defined as Audiences in Google Analytics

3. In the layout step, the browser:

   displays the on-screen elements in their new positions
   first resizes elements before computing their position
   forces the DOM to be rebuilt
   “computes the size and position of render tree elements “

4. Which metric is affected by slow pagespeed?

   Viewthrough rate
   Clickthrough rate
   Conversion rate
   Impressions

5. To deliver the fastest possible time to first render, you should minimize the number of:

   CSS classes
   critical resources
   critical HTML classes
   critical JavaScript functions

6. Which of the following is NOT true about the site search experience on mobile sites?

   Positioning site search at the top of a mobile page with an open-text search box is a best practice
   Smart-search features like auto-complete and corrected misspelling are especially important to have on small screens
   Comprehensive search results are better than concise results
   Users rely on filters to narrow down search results

7. For each font on your website you should:

   Make sure to add as many as possible
   Minimize the HTML
   Add CSS
   Minimize the number of used variants

8. Which most accurately describes the purpose of compression?

   Making the code faster
   Fitting more into the cache
   Minimizing file size
   Combining files

9. To discover and prioritize landing pages for potential improvements to the user design, you should check the:

   All Pages Report focusing on Unique Page Views metric
   All Pages Report focusing on Average Time on Page metric
   Landing Pages Report focusing on Bounce Rate metric
   Exit Pages Report focusing on Page Views metric

10. Which format is preferred for multi-device and high-resolution icons?

    PNG
    Data URLs
    Vector (SVG)
    JPEG

11. According to a Google poll, what is the top frustration when users browse the web on their mobile device?

    Watching a video
    Waiting for slow pages to load
    Being shown interstitials
    Not knowing where to click

12. Which of these features is part of a Progressive Web App?

    UX API
    Call API
    Location API
    Add to home screen

13. Which is NOT true about responsive sites?

    Responsive sites are cost-effective
    Responsive sites are easier to maintain
    Responsive sites usually have faster load times versus separate (m.dot) sites
    Responsive sites have one codebase, deployment and URL

14. True or false: Mobile pages that load 1 second faster see up to a 27% increase in conversion rate.

    false
    true

15. Which describes how a Service Worker operates?

    It can be used only when the user is browsing the website
    None of the answer options are correct
    It doesn’t handle network requests coming from the navigation on the website
    It runs a programmable network proxy

16. Which allows for efficient font reuse between pages?

    WOFF2 fonts
    The local() directive
    Revalidation token
    The font matching algorithm

17. Mobile sites:

    have specific functionality for mobile devices
    require approvals to access
    need to be downloaded or installed to a device
    are accessed through the desktop device’s web browser

18. AMP ______ the page ______ waiting for resources to download.

    displays; after
    caches; before
    lays out; without
    indexes; while

19. Before introducing mobile site design best practices to your clients, you should examine their:

    design process
    existing mobile sites
    page speed scores
    staffing and budget

20. A good notification:

    is relevant
    has a default action
    can be dismissed
    delivers in the background

21. True or false: To instruct the browser to use the default device width, you would use

    <meta name=”viewport” content=”width=device-width”>
    False
    True

22. What is a valid event for a Service Worker to emit when it’s registered?

    Idle
    Install
    Canceled
    Stop

23. True or false: JavaScript can block DOM construction unless explicitly declared as async.

    false
    true

24. Why can an intermittently available mobile network result in a poor experience?

    It is less secure than WiFi
    Some assets might not be loaded
    It uses more data
    Enabling WiFi reduces battery life

25. To optimize for speed, you shouldn’t use too many webfonts and you should minimize the number of _____.

    descenders
    dingbats
    variants
    ligatures

26. True or false: Using a mix of desktop and mobile-optimized pages on mobile sites improves the user experience since some users are more familiar with the desktop version of the site.

    True
    False

27. Which is NOT part of AMP:

    Inline CSS
    Analytics
    AMP HTML
    Custom Fonts

28. Image information such as location and camera description can often be deleted to reduce image sizes. This type of information is called:

    GZIP
    vector
    raster
    metadata

29. Which is an example of an unnecessary resource negatively impacting the user experience?

    Optimized images
    Lazy loading
    A photo carousel on the homepage that allows the visitor to preview multiple photos with a quick click
    One web font

30. Which can be sacrificed to reduce the file size of an image?

    Compression
    Quality
    Rendering speed
    Color range

31. Which of the following is NOT a best practice to optimize forms on mobile?

    Using a real-time validation for errors in forms
    Showing labels inside form fields for convenience
    Offering users a numerical keyboard for telephone number field
    Exposing options instead of using a drop-down menu

32. What is a tool that you can use to emulate and simulate a site that’s experiencing poor or unreliable connectivity?

    Speedtest.net
    Webpagetest.org
    Pingdom.com
    Speedguide.net

33. Which of the following is NOT a best practice for a financial company to keep users from dropping out of the funnel?

    Remembering and prefilling preferences of registered users in forms
    Asking for registration to use the site
    Letting users convert as a guest
    Using click-to-call buttons for complicated forms or complex tasks

34. How do you prioritize optimization of a mobile site for browser versions or screen resolutions:

    Look for the highest number of sessions and lowest conversion rates (or highest bounce rates)
    Prioritize the site with the highest conversion rates
    Look for the oldest version of your site
    Optimize all at the same time

35. When referring to the critical rendering path in site performance, a critical resource is:

    a resource that takes more than 500ms to load
    any resource that returns a 404
    a resource that could block initial display of the page
    any resource that must be loaded

36. Which of the following describes the Payment Request API correctly?

    It bypasses the checkout form
    It replaces your payment processor
    It is designed for external card readers
    It requires a phone with a fingerprint reader

37. If you’re in an animation like scrolling, you should ideally be looking to keep your JavaScript to something in the region of:

    9ms – 10ms
    7ms – 8ms
    5ms – 6ms
    3ms – 4ms

38. Why are push notifications important for advertisers?

    They deliver timely updates to users
    All of the answer options are correct
    They give users the opportunity to re-engage with content they are interested in
    The information they deliver can be acted on immediately

39. In which of the following situations can a high bounce rate be interpreted as a good metric?

    Campaign landing page brings the user to the product detail page
    Campaign landing page brings the user to a page where the company promotes their phone number to receive calls
    Campaign landing page brings the user to the first step of a 3-step lead generation form
    Vector (SVG)

40. The first step to optimize the critical rendering path is to:

    minimize number of critical resources: eliminate them, defer their download, mark them as async, and so on
    optimize the order in which the remaining critical resources are loaded: download all critical assets as early as possible to shorten the critical path length
    analyze and characterize your critical path: number of resources, bytes, length
    optimize the number of critical bytes to reduce the download time (number of roundtrips)

41. Which changes to “geometric properties” affect the layout?

    Top
    All of the answers are correct
    Widths
    Heights

42. Keeping CSS independent of HTML allows us to treat_______and _______as separate concerns.

    user experience; speed
    analytics; optimization
    images; articles
    content; design

43. Some users aren’t comfortable converting on their mobile device. What could be an action you can take to improve their experience?

    Showing the desktop version of the site on mobile devices
    Offering secondary call-to-action buttons, like social sharing
    Asking the user to register to save their details
    Making your primary call-to-action buttons more prominent

44. Research shows that mobile users expect to:

    tap the logo at the top of a mobile page to take them back to the homepage
    tap the logo at the top of a mobile page to take them to a “Contact Us” page
    see the logo below the fold on mobile sites
    tap the logo at the top of a mobile page to take them to new products

45. Which of the following reports in Google Analytics helps you to identify leakages from the conversion funnel?

    Product Performance Report
    Device Usage Report
    Top Landing Pages Report
    Checkout Behavior Analysis Report

46. Why do CSS @imports harm performance?

    @import loads files less efficiently than <link>
    They create a less efficient CSSOM
    They can introduce unwanted dependencies
    They require additional CPU time to parse

47. True or false: A/B testing allows you to test two or more elements on the site to understand their effects on each other

    False
    True

48. Which of the following statements is true about the mobile experience of users?

    It’s important to show a prominent “full site” label on a mobile site
    It’s important to show as much information as possible on the visible part of a mobile site
    It’s important to use call-to-action buttons to keep users in the same browser window
    Users are willing to accept longer load times for high-resolution images

49. True or false: You can experiment with Google Analytics features by using the Google Merchandise Store demo account.

    False
    True

50. When using Chrome devtools, what should you limit the connectivity to?

    Regular 4G
    Regular 2G
    Regular 3G
    No Throttling

51. Which of the following describes an App shell?

    It is comprised of all page elements which are dependant of the specific page contents
    None of the answer options are correct
    It provides a fast first impression gracefully transitioning to a fully loaded page
    It discourages caching of content that overlaps across pages of the website

52. What’s the fastest and best-optimized resource?

    Javascript
    Web fonts
    An image
    The one not sent

53. The App shell helps with:

    Making transitions between pages faster
    Improving elements of the UX
    Creating a fully optimized site
    Making the full page load faster

54. Before the browser can render the page, it needs to construct the:

    Pixel pipeline
    DOM and CSSOM trees
    UX trees
    HTML and JavaScript

55. What does “Variant A” in A/B Testing usually represent?

    Test version of the web page that is modified from the original
    Less than 5000
    Original version of the web page
    Greater than 95%

56. True or false: Constructing the Document Object Model (DOM) requires style information.

    True
    False

57. A Progressive Web App:

    needs high bandwidth environments
    works even with unreliable network through service worker
    slows experience and therefore decreases conversion rate
    is the same as Accelerated Mobile Page

58. True or false: Images should never change when rotating a device screen or between different device sizes.

    False
    True

59. How does AMP work?

    Keeps all third-party JavaScript out of the critical path
    All of the answers are correct
    Doesn’t let extension mechanisms block rendering
    Allows only asynchronous scripts

60. At a minimum, what page weight should you be aiming for?

    Less than 1MB
    2.1MB
    2MB
    More than 3MB

61. How can you make the job simpler for the browser?

    Add more parents
    Change the selector to a class
    Create more complex CSS
    Follow the style guide

62. Which components often account for most of the downloaded bytes on a web page?

    Fonts
    Articles
    Images
    JavaScript

63. Which is a benefit of a mobile site over an app for businesses?

    You have to build a separate site for tablets and phones
    Shorter development timelines
    Mobile sites only work on Android
    Mobile sites require approvals before one can gain access

64. At a minimum, what Speed Index score should you be aiming for?

    Within 10% of similar sites
    Greater than 95%
    Less than 5000
    Greater than 5000

65. Why did Facebook create “2G Tuesdays”?

    Facebook didn’t create “2G Tuesdays”
    To run a random experiment
    Most users are on 2G
    To understand how people on 2G use their product