Below is the answer for the question why do CSS @imports harm performance?
Why do CSS @imports harm performance?
They can introduce unwanted dependencies
They create a less efficient CSSOM
@import loads files less efficiently than <link> ✅
They require additional CPU time to parse
correct answer
Below is the answer and explanation for the question which format is preferred for the multi-device and high-resolution icons?
Which format is preferred for the multi-device and high-resolution icons?
PNG
Vector (SVG) ✅
Data URLs
JPEG
correct answer
Vector (SVG) ✅
explanation
Below is the answer and explanation for the question before the browser can render the page, it needs to construct the:
Before the browser can render the page, it needs to construct the:
Pixel pipeline
DOM and CSSOM trees ✅
UX trees
HTML and JavaScript
correct answer
DOM and CSSOM trees ✅
Below is the answer and explanation for the question to deliver the fastest possible time to first render, you should minimize the number of:
To deliver the fastest possible time to first render, you should minimize the number of:
The number of CSS classes
The number of critical JavaScript functions
The number of critical resources ✅...
Below is the answer for the question which is a benefit of a mobile site over an app for businesses?
Which is a benefit of a mobile site over an app for businesses?
Shorter development timelines. Mobile sites allow for easy updating (for example, users don’t need to accept or install your updates. ✅
You have to build a separate site for tablets an...
Below is the answer and explanation for the question which can be sacrificed to reduce the file size of an image?
Which can be sacrificed to reduce the file size of an image?
Quality ✅
Rendering speed
Color range
Compression
correct answer
Quality ✅
explanation
Finding t...
Below is the answer and explanation for the question Which metric is affected by slow page speed?
Which metric is affected by slow page speed?
View through rate
Conversion rate ✅
Clickthrough rate
Impressions
correct answer
Conversion rate ✅
explanation
Optimizing the cr...
Below is the answer and explanation for the question why can an intermittently available mobile network result in a poor experience?
Why can an intermittently available mobile network result in a poor experience?
Enabling wifi reduces battery life
It uses more data
Some assets might not be loaded ✅
It is less secure than wifi
Below is the answer and explanation for the question true or false: constructing the document object model (DOM) requires style information.
True or false: constructing the document object model (DOM) requires style information.
True
False ✅
correct answer
False ✅
explanation
DOM construc...
Below is the answer and explanation for the question a good notification:
A good notification:
It is relevant ✅
It delivers in the background
It can be dismissed
It has a default action
correct answer
It is relevant ✅
explanation
Push notifications are one of the most va...