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

October 30, 2018 By CertificationAnswers

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

Images

Fonts

JavaScript

Articles

Explanation:

Images often account for most of the downloaded bytes on a web page and also often occupy a significant amount of visual space.

For each font on your website you should:

October 30, 2018 By CertificationAnswers

For each font on your website you should:

minimize the HTML

male sure to add as many as possible

minimize the number of used variants

add CSS

Explanation:

Audit and monitor your font use: don’t use too many fonts on your pages, and, for each font, minimize the number of used variants. This helps produce a more consistent and a faster experience for your users.

Which of these are NOT part of AMP:

October 30, 2018 By CertificationAnswers

Which of these are NOT part of AMP:

Inline CSS

Custom fonts

AMP HTML

Analytics

Explanation:

Which allows for efficient font reuse between pages?

October 30, 2018 By CertificationAnswers

Which allows for efficient font reuse between pages?

WOFF2 fonts

The font matching algorithm

Revalidation token

The local() directive

Explanation:

Specify revalidation and optimal caching policies: fonts are static resources that are infrequently updated. Make sure that your servers provide a long-lived max-age timestamp and a revalidation token to allow for efficient font reuse between different pages.

Currently, Google Optimize does NOT currently allow you to:

October 30, 2018 By CertificationAnswers

Currently, Google Optimize does NOT currently allow you to:

do heatmap analysis to better understand to user behaviour on your site

use your existing goals and metrics in Google Analytics as experiment objectives

test new website designs, layouts and content with a subset of your visitors

serve experiments to specific groups of users that you’ve defined as Audiences in Google Analytics

Explanation:

You can test new website designs, layouts and content with a subset of your visitors. Optimize leverages the power of Analytics by measuring all experiments natively with Analytics, allowing you to use your existing goals and metrics as experiment objectives. What’s more, you can serve experiments to specific groups of users that you’ve defined as Audiences in Analytics.

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

October 30, 2018 By CertificationAnswers

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

100

Explanation:

Most devices today refresh their screens 60 times a second. If there’s an animation or transition running, or the user is scrolling the pages, the browser needs to match the device’s refresh rate and put up 1 new picture, or frame, for each of those screen refreshes.

Each of those frames has a budget of just over 16ms (1 second / 60 = 16.66ms). In reality, however, the browser has housekeeping work to do, so all of your work needs to be completed inside 10ms. When you fail to meet this budget the frame rate drops, and the content judders on screen. This is often referred to as jank, and it negatively impacts the user’s experience.