SALESFORCE-PD1 User Interface Practice Test 4 — 15 Questions

Question 1

Which tag is used in Visualforce to output field labels and values dynamically based on sObject field definitions?

Accepted Answer

. renders field values with correct formatting and related labels.

Answer

<apex:field>

Answer

<apex:inputField>

Answer

<apex:outputText>

Question 2

A developer creates a Lightning Web Component that consumes data from a wire adapter. The wire adapter returns an object with 'data' and 'error' properties. What is this pattern called in LWC?

Accepted Answer

Wired property / result object pattern. Wire adapters return a wrapper object containing data and error properties.

Answer

Event emitter pattern

Answer

Promise chaining

Answer

Async/await callback pattern

Question 3

A developer is building a Lightning Web Component and needs to navigate to a URL that is external to Salesforce. Which PageReference type should be used with NavigationMixin?

Accepted Answer

standard__webPage. standard__webPage is the PageReference type for navigating to external URLs or web pages.

Answer

standard__recordPage

Answer

standard__namedPage

Answer

standard__objectPage

Question 4

Which base Lightning component is used to show a progress indicator or spinner in LWC?

Accepted Answer

lightning-spinner. lightning-spinner is the standard component for loading spinners in LWC.

Answer

ui:spinner

Answer

apex:spinner

Answer

lightning-progress

Question 5

A developer is configuring a Lightning Web Component to be used as a Quick Action on a record page. Which target configuration must be added to the component's metadata file?

Accepted Answer

lightning__RecordAction. lightning__RecordAction enables a component to be used as a record-level quick action.

Answer

lightning__AppPage

Answer

lightning__RecordPage

Answer

lightning__Tab

Question 6

Which tag is used in Visualforce to embed JavaScript code directly inside the page?

Accepted Answer

. or can include scripts, but links external JS files. For inline script, standard HTML

Answer

<apex:js>

Answer

<apex:code>

Answer

<apex:javascript>

Question 7

A developer is building a Lightning Web Component and needs to dispatch a custom event. Which constructor should be used to create the event?

Accepted Answer

CustomEvent. CustomEvent is the standard browser constructor used to create custom events in LWC.

Answer

Event

Answer

AuraEvent

Answer

LightningEvent

Question 8

Which TWO lifecycle hooks are available in Lightning Web Components? Choose 2 answers.

Accepted Answer

renderedCallback. connectedCallback and renderedCallback are standard LWC lifecycle hooks.

Answer

init

Answer

componentDidMount

Answer

willMount

Question 9

A developer is using the Lightning Message Service and needs to unsubscribe from a message channel when a component is destroyed. In which lifecycle hook should unsubscribe be called?

Accepted Answer

disconnectedCallback. disconnectedCallback is used for cleanup tasks like unsubscribing from message channels or removing event listeners when a component is removed from the DOM.

Answer

connectedCallback

Answer

constructor

Answer

renderedCallback

Question 10

Which TWO tools or features are recommended for styling Lightning Web Components according to best practices? Choose 2 answers.

Accepted Answer

Component-scoped CSS style files (.css). SLDS utility classes and scoped CSS stylesheets are the standard ways to style LWC.

Answer

Global un-scoped CSS stylesheets loaded in every page

Answer

Inline style tags in HTML templates

Answer

Bootstrap CSS framework via static resource

Question 11

Which TWO conditions must be met for an Apex method to be wired using the @wire service in an LWC? Choose 2 answers.

Accepted Answer

The Apex method must be public or global and static.. Wired Apex methods must be static, public or global, and annotated with @AuraEnabled(cacheable=true).

Answer

The Apex method must return a DML operation result.

Answer

The Apex method must return a PageReference.

Answer

The Apex method must be asynchronous using @future.

Question 12

Which TWO techniques can be used to pass data from a parent component to a child Lightning Web Component? Choose 2 answers.

Accepted Answer

Calling public @api methods defined on the child component instance from the parent JavaScript.. Data is passed down via public properties decorated with @api or by invoking public child methods.

Answer

Using application events via $A.get('e...')

Answer

Directly modifying child private properties using DOM queries.

Answer

Using global window variables.

Question 13

Which TWO configuration files or metadata elements are required when creating a Lightning Web Component? Choose 2 answers.

Accepted Answer

A JavaScript file (.js). Every LWC requires an HTML template file and a metadata configuration XML file.

Answer

A CSS stylesheet (.css)

Answer

An Apex controller class

Answer

An Aura dependency bundle (.auradoc)

Question 14

Which THREE statements are true regarding Lightning Web Component shadow DOM encapsulation? Choose 3 answers.

Accepted Answer

querySelector calls inside a component only search within that component's template unless using specific host selectors.. Shadow DOM encapsulates templates, styles, and queries, preventing external CSS bleeding and restricting queries to the component template.

Answer

Global CSS stylesheets automatically penetrate and override LWC shadow DOM styles.

Answer

Child components can be styled directly from parent CSS files without styling hooks.

Question 15

Which THREE features or capabilities are supported by the Lightning Message Service (LMS)? Choose 3 answers.

Accepted Answer

Communication between unrelated components on the same Lightning page.. LMS supports communication across DOM boundaries, between Visualforce, Aura, and LWC.

Answer

Communication across components in different browser tabs.

Answer

Executing asynchronous server-side database updates automatically.