User Interface

Question 1

What elements are required to use Remote Objects?

Answer 1

apex:RemoteObjects and SObjectModel

Question 2

How to pass errors from Apex to Aura/LWC?

Answer 2

1. Try/catch
2. AuraHandledException
3. Checking response state in JS

Question 3

When Remote Objects can be utilized?

Answer 3

You want to create, edit objects without using Apex Code.

Question 4

When Remoting can be utilized?

Answer 4

1. Execute complex server-size logic.

2. High-load traffic.

Question 5

Which Visualforce component can be used to show the status of asynch request?

Answer 5

apex:actionStatus
startText
stopText
id=

Question 6

Which of the following tags is used on a Visualforce page in order to display messages generated for all components on the page?

Answer 6

apex:pageMessages

Question 7

What tag is used to display a message for a single referenced component?

Answer 7

apex:pageMessage

Question 8

What is correct syntax to specify the message as en error in Visualforce?

Answer 8

ApexPages.Severity.ERROR

Question 9

Advantages of Javascript Remoting

Answer 9

1. Stateless.

2. Asynchronous

Question 10

What tags are supports action attribute?

Answer 10

commandButton
commandLink
actionPoller
actionSupport
actionFunction
apex:page

Question 11

How to catch and display errors in Visualforce?

Answer 11

1. Try / catch
2. ApexPages.addMessage
3. apex:pageMessages

Question 12

Where reRender attribute can’t be utilized?

Answer 12

In cases, where there is a need to update table

Question 13

How to show Lightning Experience’s toast errors in Visualforce env?

Answer 13

sforce.one.showToas({toastParams})

Question 14

How to make continuation work in Aura/ LWC?

Answer 14

1. Add the continuation=true annotation to the action method that returns the continuation instance.
2. (Optionally, but recommended) Add the cacheable true annotation to the method that returns the continuation instance

Question 15

What can be used to display error messages to users in the Salesforce user interface?

Answer 15

1. lightning-platform-show-toast-event (lwc)
2. apex:pageMessages (visualforce)
3. lightning:notificationsLibrary (aura)

Question 16

How to import static resources in Aura?

Answer 16

1. ltng:require + scripts styles attributes and $Resource global variable.

Question 17

How to import static resource in LWC?

Answer 17

1. Import loader from platformResourceLoader
2. Import static resources from @salesforce/resourceUrl
3. Use loadScript, loadStyle

Question 18

How to override standard action with Aura component?

Answer 18

Create a component that implements lightning:actionOverride

Question 19

Which annotation allows Aura component to be used as a quick action?

Answer 19

force:lightningQuickAction

Question 20

How to check user permission in LWC?

Answer 20

import @salesforce/customPermission or @salesforce/userPermission to check for assignment of the current user

Question 21

How to allow to communicate the Visualforce / Aura / LWC to communicate to each other on the same page?

Answer 21

Lightning message service

Question 22

How to make a LWC as a object specific action?

Answer 22

ScreenAction

lightning_RecordAction

Question 23

Can LWC call global actions?

Answer 23

No. In this case lwc included in Aura

Question 24

How to get form-factor and determine if current device Phone or Table?

Answer 24

Use $Browser global variable

Question 25

Pros of static resources:

Answer 25

1. Load third-party library and reuse in Aura/LWC/Visualforce
2. Maintain consistent look across components.

Question 26

What are values are supported by targetConfigs[i].supportedFormFactors[i] attribute?

Answer 26

Small, Large

Question 27

How to close modal in lwc using JS?

Answer 27

Dispatch CloseActionScreenEvent

Question 28

What suffix has messageChannel in LWC?

Answer 28

__c