Google Mobile Sites Certification Exam Answers

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100% Free Updated Google Mobile Sites Certification Exam Questions & Answers.

This assessment covers basic and advanced concepts, including best practices for creating, managing, measuring, and optimizing mobile websites. Passing this assessment demonstrates a strong knowledge of mobile sites design and an understanding of best practices and current browser technologies.

Google Mobile Sites Assessment Details:

  • Questions: 65 questions
  • Time limit: 90 minutes to complete the assessment
  • Pass rate: 80% or higher to pass
  • Retake period: If you don’t pass the assessment, you can take it again after 1 day
  • Validity Period: 12 Months

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For taking the Google Mobile Sites Exam to follow the below steps

☑ Step 1: Go here and sign in with your Google account.

☑ Step 2: Start your exam.

☑ Step 3: Copy (Ctrl+C) the question from Google exam section and then find (Ctrl+F) the question from here and get the correct answer.

☑ Step 4: After completing the exam, you will get Google Mobile Sites Certificate.

How does AMP work?

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

Why do CSS @imports harm performance?

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

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

True or false: To instruct the browser to use the default device width, you would use <meta name=”viewport” content=”width=device-width”>

  • True
  • False

Why did Facebook create “2G Tuesdays”?

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

In the layout step, the browser:

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

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

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

Which allows for efficient font reuse between pages?

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

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

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

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

  • True
  • False

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

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

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

  • UX API
  • Add to home screen
  • Call API
  • Location API

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

  • True
  • False

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

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

Which most accurately describes the purpose of compression?

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

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

  • True
  • False

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

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

  • True
  • False

How can you make the job simpler for the browser?

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

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

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

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

  • JavaScript
  • Articles
  • Fonts
  • Images

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
  • 3ms – 4ms
  • 5ms – 6ms
  • 7ms – 8ms

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

  • Color range
  • Compression
  • Rendering speed
  • Quality

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

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

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

  • True
  • False

How many times per second do most devices refresh their screens?

  • 35
  • 60
  • 20
  • 100

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

  • critical HTML classes
  • critical resources
  • critical JavaScript functions
  • CSS classes

Which is NOT part of AMP:

  • Analytics
  • Inline CSS
  • Custom Fonts

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

  • page speed scores
  • existing mobile sites
  • staffing and budget
  • design process

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

  • True
  • False

Which changes to “geometric properties” affect the layout?

  • Heights
  • Widths
  • All of the answers are correct
  • Top

A Progressive Web App:

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

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

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

Resources with responses that are ______ for all users are great candidates to be cached by a CDN

  • variants
  • sized
  • different
  • identical

Which is NOT true about responsive sites?

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

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
  • Exit Pages Report focusing on Page Views metric
  • Landing Pages Report focusing on Bounce Rate metric

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

  • Regular 4G
  • No Throttling
  • Regular 3G
  • Regular 2G

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

  • dingbats
  • descenders
  • variants
  • ligatures

What’s the fastest and best-optimized resource?

  • An image
  • Web fonts
  • The one not sent
  • Javascript

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

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

For each font on your website you should:

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

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

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

A good notification:

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

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

  • 2MB
  • 1MB
  • More than 3MB
  • Less than 1MB

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

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

Currently, Google Optimize does NOT currently allow you to:

  • 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
  • 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

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

  • JPEG
  • PNG
  • Vector (SVG)
  • Data URLs

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

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

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

  • Stop
  • Install
  • Idle
  • Canceled

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

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

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

  • raster
  • metadata
  • GZIP
  • vector

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

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

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

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

Mobile sites:

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

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
  • Vector (SVG)
  • Campaign landing page brings the user to the first step of a 3-step lead generation form

AMP ______ the page ______ waiting for resources to download

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

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


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
  • analyze and characterize your critical path: number of resources, bytes, length
  • 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
  • optimize the number of critical bytes to reduce the download time (number of roundtrips)

Which describes how a Service Worker operates?

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

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

  • DOM and CSSOM trees
  • Pixel pipeline
  • UX trees
  • HTML and JavaScript

The render tree contains:

  • the DOM
  • content of the page
  • visible content
  • the styles of the page

The App shell helps with:

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

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

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

Which metric is affected by slow pagespeed?

  • Clickthrough rate
  • Conversion rate
  • Viewthrough rate
  • Impressions

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

Which of the following describes the Payment Request API correctly?

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

Research shows that mobile users expect to:

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

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
  • Users are willing to accept longer load times for high-resolution images
  • 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