SF-PD2 User Interface — All Questions With Answers

Question 1hardmulti select

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A company wants to implement a multi-page form in a Lightning Experience Console app that allows users to navigate between stages while maintaining state. Which TWO features of the Lightning Workspace API should a developer use to enhance the user experience by managing tab behavior? (Choose TWO)

Question 2mediummultiple choice

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Refer to the exhibit. A developer is using the getRecord wire adapter in a Lightning Web Component with the configuration shown. If the current user does not have FLS (Field Level Security) access to the 'Phone' field, what will be the result when the wire service executes?

Exhibit

{
  "apiName": "Account",
  "fields": ["Name", "Industry"],
  "optionalFields": ["Phone"]
}

Question 3hardmultiple choice

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A developer needs to integrate a third-party JavaScript library that performs complex data visualizations within a Lightning Web Component. The library is stored as a Static Resource. What is the correct pattern for loading this library and ensuring it is initialized only after it is fully loaded?

Question 4hardmulti select

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When migrating an existing Aura component to Lightning Web Components, which THREE factors must the developer consider regarding interoperability and composition? (Choose THREE)

Question 5mediummulti select

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A developer needs to ensure that a Lightning Web Component's CSS styles do not leak out to other components on the page and that global styles do not affect the component's internal structure. Which TWO concepts describe how LWC achieves this? (Choose TWO)

Question 6mediummulti select

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A developer wants to use the Lightning Message Service (LMS) to communicate between a Visualforce page and a Lightning Web Component on the same Lightning Page. Which TWO steps are required to implement this? (Choose TWO)

Question 7mediummultiple choice

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A developer needs to build a custom Lightning Web Component that dynamically loads child components based on user interaction without waiting for the initial page load. Which approach should the developer use to optimize performance and rendering?

Question 8hardmultiple choice

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A developer is building a Lightning Web Component that is placed on a Lightning record page. A child component nested inside the same template fires a custom event named `recordselected` that bubbles and is composed. The parent template listens for the event. During testing, the parent's handler never runs, and the console shows the event was dispatched. Which change should the developer make so the parent handler receives the event?

Question 9hardmulti select

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A developer is building a Lightning Web Component that needs to communicate with a parent Aura component. The LWC is nested inside the Aura component. The developer wants to send data from the LWC to the Aura component. Which two methods can be used to achieve this? (Choose two.)

Question 10mediummultiple choice

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A developer is creating a Lightning Web Component that must be used as a quick action on the Account object. The component needs to display the account's name and allow the user to update the account's phone number. The developer wants to ensure the component receives the record ID and can access the record data. Which approach should the developer use?

Question 11mediummultiple choice

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A developer is building a Lightning Web Component that must call an Apex method and immediately display the returned Account records. The Apex method is decorated with @AuraEnabled(cacheable=true). The developer wants the component to refresh its data whenever the record page's data changes. Which approach should the developer use?

Question 12hardmulti select

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A developer is building a Lightning Web Component that displays a list of contacts for a given account. The component uses the getRecord wire adapter to retrieve the account's contacts. The developer wants to ensure the component updates automatically when the contact records change on the server. Which two actions should the developer take? (Choose two.)

Question 13mediummultiple choice

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A developer is building a Lightning Web Component that must call an Apex method to retrieve a list of Accounts and display them. The Apex method is annotated with @AuraEnabled(cacheable=true). The developer writes the following import statement: import getAccounts from '@salesforce/apex/AccountController.getAccounts'; and then calls it in a wire adapter. Which wire adapter should the developer use to invoke this Apex method?

Question 14mediummulti select

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A developer is building a Lightning Web Component that must render a list of contacts and allow the user to select multiple contacts to delete. The component uses lightning-datatable with a custom data source. Which TWO actions must the developer take to handle row selection and deletion correctly? (Choose two.)

Question 15hardmultiple choice

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A developer is building a Lightning Web Component that must display a custom UI in a Visualforce page using Lightning Out. The component uses the lightning/navigation module to navigate to a record page. When the component is rendered in the Visualforce page, the navigation fails. What is the most likely cause?

Question 16hardmultiple choice

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A developer is creating a Lightning Web Component that renders a list of contacts fetched imperatively with getRecord or a wire adapter. Each row has a button that opens a custom modal defined in the same component. The developer wants the modal markup to exist in the DOM only while it is open, and wants to avoid a full page navigation. Which approach best satisfies these requirements?

Question 17hardmultiple choice

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A developer is building a Lightning Web Component hosted inside a Visualforce page via lightning:container. The component needs to invoke an Apex method that returns sensitive data. The developer wants the call to run in the user's context and respect Apex sharing rules, without exposing the method to unauthenticated callers. Which approach should be used?

Question 18mediummulti select

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A developer is building a Lightning Web Component for a Lightning Experience record page that must display field values from the current record and re-render automatically whenever the user edits and saves those fields on the page. The component should not make its own Apex callout. Which TWO techniques should the developer use to meet these requirements? (Choose two.)

Question 19mediummultiple choice

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A developer is creating a Lightning Web Component that must be placed on a Lightning record page for the Case object. The component needs to read the record Id from the page context and then perform an imperative Apex call. Which approach correctly obtains the record Id in the component?

Question 20mediummulti select

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A developer is building a Lightning Web Component that displays a list of contacts and must allow the user to navigate to a selected contact's record page. The component is deployed both to Lightning Experience and to a Salesforce mobile app. Which TWO techniques are supported for performing this navigation? (Choose two.)

Question 21hardmulti select

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A developer is creating a Lightning Web Component that must render a list of contacts and allow inline editing of the phone field. The component should use base Lightning components for the form and handle the save operation with Apex. Which TWO approaches are valid for ensuring the component updates the UI after a successful save? (Choose two.)

Question 22hardmulti select

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A developer is building a Lightning Web Component that must call an Apex method imperatively and handle errors gracefully. The component needs to show a toast when the call fails and must also pass parameters to the Apex method. Which TWO practices are correct for this scenario? (Choose two.)

Question 23mediummultiple choice

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A developer is building a Lightning Web Component that is embedded inside a Visualforce page using lightning:container. The component needs to receive a String parameter named recordName from the Visualforce page. The developer has exposed a public property in the LWC. Which approach correctly passes the value from Visualforce to the LWC?

Question 24easymultiple choice

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A developer needs to display a list of accounts in a Lightning Web Component. The component should use a base Lightning component that provides built-in sorting, filtering, and column selection without custom code. Which component should the developer use?

Question 25easymultiple choice

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A developer is building a Lightning Web Component that must conditionally render a section only when a boolean property isShowDetails is true. Which template syntax correctly implements this conditional rendering?

Question 26mediummultiple choice

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A developer is building a Lightning Web Component that includes a child component. The parent needs to pass a callback so the child can notify it when a row is selected, and the child must not expose the callback in its public API documentation. Which mechanism should the developer use?

Question 27mediummultiple choice

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A developer is building a Lightning Web Component that must render a list of 500 opportunity records fetched via a wire adapter. Users report that the component becomes unresponsive when the list grows. The developer wants to render only the rows currently visible in the viewport and recycle DOM nodes as the user scrolls. Which Salesforce-provided technique should the developer implement?

Question 28easymultiple choice

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A developer needs to display a toast notification in a Lightning Web Component after a successful record update. The component uses Lightning Data Service to save the record. Which module and method should the developer use to show the toast?

Question 29mediummulti select

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A developer is creating a Lightning Web Component that must expose a public method so a parent Aura component can call it. The parent Aura component uses component.find() to locate the LWC and invoke the method. Which TWO statements are correct about this interoperability scenario? (Choose two.)

Question 30mediummultiple choice

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A developer is building a Lightning Web Component that must render a list of 5,000 Account records retrieved from an Apex controller. Users need to scroll the entire list, sort columns client-side, and select multiple rows for a bulk action. The component must load quickly and remain responsive. Which approach should the developer use?

Question 31mediummultiple choice

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A developer is building a complex nested Lightning Web Component structure. A deeply nested child component needs to notify an ancestor component, which is not the immediate parent, about a data change. Which configuration of the CustomEvent constructor should the developer use to ensure the event reaches the ancestor across the shadow DOM boundary?

Question 32mediummulti select

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A developer is tasked with internationalizing a Lightning Web Component that will be deployed globally. Which TWO Salesforce features should be used to handle locale-specific formatting and translations? (Choose TWO)

Question 33mediummultiple choice

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A developer is creating a Lightning Web Component to display a list of high-priority Opportunities. The component needs to reactively update whenever an Opportunity is updated elsewhere on the page by another component. Which approach is most efficient and requires the least amount of custom code?

Question 34easymultiple choice

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A developer wants to ensure that a Lightning Web Component is only available for use on Record Pages for the Account and Contact objects in the Lightning App Builder. How should the developer configure the component's metadata file?

Question 35hardmultiple choice

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A developer is experiencing performance issues with a Visualforce page that includes multiple complex components and a large amount of data. The page uses a standard controller with several extensions. Which technique should the developer use to reduce the view state size and improve page load time?

Question 36hardmultiple choice

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Refer to the exhibit. A developer is attempting to push source code to a scratch org and encounters the error shown. The developer confirms that 'utils.js' and 'utils.js-meta.xml' exist in the 'force-app/main/default/lwc/utils/' directory. What is the most likely cause of this error?

Exhibit

sfdx force:source:push
ERROR running force:source:push: 
LWC1011: Failed to resolve import "c/utils" from "accountDetails.js". 
Please check that the file exists and is available in the workspace.

Question 37mediummultiple choice

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A developer is building a Lightning Web Component that needs to display a formatted date and time based on the user's timezone. Which standard JavaScript object, compatible with LWC, should be used to handle this without additional libraries?

Question 38mediummultiple choice

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A developer is building a Lightning Web Component that needs to communicate with a parent component in a deep containment hierarchy. The event must traverse shadow boundaries without stopping at component boundaries. Which property configuration should the developer apply when instantiating the CustomEvent?

Question 39hardmultiple choice

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An enterprise Salesforce implementation requires a Lightning Web Component to display massive amounts of tabular data with extremely high rendering performance. The standard lightning-datatable component fails to meet performance SLAs during stress testing. Which architectural approach should the developer implement to optimize rendering performance?

Question 40mediummultiple choice

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A developer is building a Lightning Web Component for a Lightning Experience record page. The component must display a toast notification to the user after a successful save operation. The developer uses the ShowToastEvent from the lightning/platformShowToastEvent module. Which import statement is correct?

Question 41hardmultiple choice

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A developer is creating a Lightning Web Component that includes a lightning-input field for a phone number. The component must validate that the input matches a specific pattern before allowing the user to submit a form. The developer wants to use the built-in validation features of lightning-input. Which attribute should be set to enforce a custom validation pattern?

Question 42mediummultiple choice

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A developer is building a Lightning Web Component for a Lightning Experience app. The component contains a form with an <input> for a search term and a list of results. When the user types into the input, the component must call an Apex method that returns matching records. The developer observes that the Apex method is being invoked on every keystroke, causing excessive server calls. Which technique should the developer use to limit the number of Apex calls while still updating the results as the user types?

Question 43easymultiple choice

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A developer is creating a Lightning Web Component that includes a button. When the button is clicked, the component should call an Apex method to save data. Which decorator should be used to expose the Apex method to the Lightning Web Component?

Question 44hardmultiple choice

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A developer is creating a Lightning Web Component that must expose a public property so that a parent Aura component can pass a record ID into it. The LWC is embedded inside the Aura component using aura:component with an attribute. Which decorator and configuration should the developer use on the LWC property?

Question 45hardmulti select

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A developer is creating a Lightning Web Component that needs to display a list of Contacts for a given Account. The component will be placed on a Lightning record page for Account. The developer wants to use the getRelatedListRecords wire adapter from lightning/uiRelatedListApi to fetch the contacts. Which two parameters are required in the wire configuration object for getRelatedListRecords? (Choose two.)

Question 46mediummultiple choice

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A developer is building a Lightning Web Component that must expose a public method so a parent component can programmatically trigger a refresh of the child's data. The child component's method is decorated with @api and named refreshData. The parent component holds a template reference to the child element. Which code in the parent correctly invokes the child method?

Question 47mediummultiple choice

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A developer has a Lightning Web Component named accountTile that exposes a public property accountName decorated with @api. A parent Aura component includes accountTile using <c:accountTile accountName="Acme"/>. During testing, the account name never appears. The developer confirms the property is set in the LWC constructor. What is the cause?

Question 48mediummultiple choice

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A developer is building a Lightning Web Component that includes a lightning-button. The button's click handler is defined as an arrow function in the component's JavaScript file. The developer wants to pass the event object to the handler to access the event's target. Which syntax should be used in the component's HTML template to correctly bind the handler and pass the event?

Question 49mediummultiple choice

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A developer is building a Lightning Web Component that must surface a toast notification when an Apex callout returns a specific error code. The component is used inside a Salesforce mobile app and on desktop. Which module should the developer import to display the toast?

Question 50easymultiple choice

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A developer is building a Lightning Web Component that includes a button. When the button is clicked, the component must navigate the user to a specific Account record page in Lightning Experience. Which approach should the developer use?

Question 51hardmultiple choice

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A developer is building a Lightning Web Component that needs to navigate to a specific record page when a user clicks a button. The developer wants to use the NavigationMixin from lightning/navigation. The component is a child component nested inside another component, and the developer needs to ensure that the navigation works correctly. Which code snippet correctly uses NavigationMixin to navigate to an Account record page?

Question 52mediummultiple choice

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A developer is building a Lightning Web Component that must render a large list of order records retrieved from Apex. The component displays each order's formatted total, which follows the user's locale (for example, 1.234,56 € in Germany versus $1,234.56 in the US). Which approach correctly formats each order total for the current user?

Question 53hardmultiple choice

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A developer needs a Lightning Web Component to expose a public method so that an Aura component on the same page can call it and pass a string parameter. Which approach should the developer use?

Question 54hardmultiple choice

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A developer is building a Lightning Web Component that must display a toast notification when a record is saved successfully. The component uses lightning/platformShowToastEvent. Which import and usage are correct?

Question 55easymultiple choice

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A developer is creating a Lightning Web Component that needs to display a toast message when a record is saved successfully. The developer imports ShowToastEvent from lightning/platformShowToastEvent. Which code correctly dispatches a success toast with the title 'Saved' and message 'Record saved successfully'?

Question 56mediummultiple choice

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A developer is building a Lightning Web Component that must navigate the user to a new record's detail page after a successful Apex DML operation. Which module should the developer use to perform the navigation?

Question 57easymultiple choice

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A developer needs a Lightning Web Component placed on a record page to read the 18-character id of the record currently being viewed, without querying the database or calling Apex. Which approach provides this value directly?

Question 58hardmultiple choice

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A developer is building a Lightning Web Component that must expose a method to an Aura component wrapper so the Aura component can call it after a user action. The LWC method is decorated with @api and named doSomething. Which code in the Aura component correctly invokes it?

Question 59easymultiple choice

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A developer needs to display a read-only, formatted phone number on a Lightning record page. The value comes from a field on the record and should render consistently with Salesforce's standard phone formatting. Which base component should be used?

Question 60hardmultiple choice

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A developer is building a Lightning Web Component that must call an Apex method that performs a callout. The component is placed on a Lightning record page, and the Apex method is annotated with @AuraEnabled(cacheable=true). Users report that the callout never executes and an error is thrown. What is the most likely cause and the correct fix?

Question 61hardmulti select

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A developer is building a Lightning Web Component that must expose a public method callable from an Aura component on the same page. The method accepts a string and returns a promise that resolves with a boolean. Which TWO steps are required to make this method callable from the Aura parent? (Choose two.)

Question 62easymultiple choice

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A developer is creating a Lightning Web Component that will be placed on a Lightning record page for the Case object. The component must display the case's subject and status. Which approach correctly retrieves the record data so the component updates automatically when the record changes?

Question 63mediummultiple choice

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A developer is building a Lightning Web Component that renders a custom list of navigation links. The component must follow the Salesforce Lightning Design System (SLDS) styling and remain accessible to screen readers. Which approach best satisfies both the styling and accessibility requirements?

Question 64hardmultiple choice

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A developer is building a Lightning Web Component that contains an iframe hosting an external web application. The external application needs to send a message back to the Lightning Web Component when a user completes a task. Which mechanism should the developer use to receive that message securely?

Question 65mediummultiple choice

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A developer is building a Lightning Web Component that must navigate to a new record's detail page after the record is created via a custom form. The component uses NavigationMixin. Which navigation type should the developer use to navigate to the newly created record?

Question 66hardmultiple choice

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A developer has a Lightning Web Component that must call an imperative Apex method to save a record, then immediately display a toast confirming success only if the save actually succeeded. The Apex method returns a wrapper with a Boolean success flag and a message. Which imperative call pattern correctly handles both the success and error paths?

Question 67mediummultiple choice

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A developer is building a Lightning Web Component that should be embedded inside a Visualforce page. The LWC must receive a parameter passed from the Visualforce page and send an event back when a button is clicked. Which combination of features enables this integration?

Question 68hardmulti select

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A developer is building a reusable Lightning Web Component that exposes public properties and methods to its parent, and needs to fire an event the parent can handle. Which TWO techniques are valid for this parent-child interaction? (Choose two.)

Question 69easymultiple choice

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A developer needs a Lightning Web Component to navigate the user to a specific Account record's detail page when a button is clicked. Which approach is correct?

Question 1hardmulti select

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A company wants to implement a multi-page form in a Lightning Experience Console app that allows users to navigate between stages while maintaining state. Which TWO features of the Lightning Workspace API should a developer use to enhance the user experience by managing tab behavior? (Choose TWO)

Question 2mediummultiple choice

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Refer to the exhibit. A developer is using the getRecord wire adapter in a Lightning Web Component with the configuration shown. If the current user does not have FLS (Field Level Security) access to the 'Phone' field, what will be the result when the wire service executes?

Exhibit

{
  "apiName": "Account",
  "fields": ["Name", "Industry"],
  "optionalFields": ["Phone"]
}

Question 3hardmultiple choice

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A developer needs to integrate a third-party JavaScript library that performs complex data visualizations within a Lightning Web Component. The library is stored as a Static Resource. What is the correct pattern for loading this library and ensuring it is initialized only after it is fully loaded?

Question 4hardmulti select

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When migrating an existing Aura component to Lightning Web Components, which THREE factors must the developer consider regarding interoperability and composition? (Choose THREE)

Question 5mediummulti select

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A developer needs to ensure that a Lightning Web Component's CSS styles do not leak out to other components on the page and that global styles do not affect the component's internal structure. Which TWO concepts describe how LWC achieves this? (Choose TWO)

Question 6mediummulti select

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A developer wants to use the Lightning Message Service (LMS) to communicate between a Visualforce page and a Lightning Web Component on the same Lightning Page. Which TWO steps are required to implement this? (Choose TWO)

Question 7mediummultiple choice

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A developer needs to build a custom Lightning Web Component that dynamically loads child components based on user interaction without waiting for the initial page load. Which approach should the developer use to optimize performance and rendering?

Question 8hardmultiple choice

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A developer is building a Lightning Web Component that is placed on a Lightning record page. A child component nested inside the same template fires a custom event named `recordselected` that bubbles and is composed. The parent template listens for the event. During testing, the parent's handler never runs, and the console shows the event was dispatched. Which change should the developer make so the parent handler receives the event?

Question 9hardmulti select

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A developer is building a Lightning Web Component that needs to communicate with a parent Aura component. The LWC is nested inside the Aura component. The developer wants to send data from the LWC to the Aura component. Which two methods can be used to achieve this? (Choose two.)

Question 10mediummultiple choice

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A developer is creating a Lightning Web Component that must be used as a quick action on the Account object. The component needs to display the account's name and allow the user to update the account's phone number. The developer wants to ensure the component receives the record ID and can access the record data. Which approach should the developer use?

Question 11mediummultiple choice

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A developer is building a Lightning Web Component that must call an Apex method and immediately display the returned Account records. The Apex method is decorated with @AuraEnabled(cacheable=true). The developer wants the component to refresh its data whenever the record page's data changes. Which approach should the developer use?

Question 12hardmulti select

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A developer is building a Lightning Web Component that displays a list of contacts for a given account. The component uses the getRecord wire adapter to retrieve the account's contacts. The developer wants to ensure the component updates automatically when the contact records change on the server. Which two actions should the developer take? (Choose two.)

Question 13mediummultiple choice

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A developer is building a Lightning Web Component that must call an Apex method to retrieve a list of Accounts and display them. The Apex method is annotated with @AuraEnabled(cacheable=true). The developer writes the following import statement: import getAccounts from '@salesforce/apex/AccountController.getAccounts'; and then calls it in a wire adapter. Which wire adapter should the developer use to invoke this Apex method?

Question 14mediummulti select

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A developer is building a Lightning Web Component that must render a list of contacts and allow the user to select multiple contacts to delete. The component uses lightning-datatable with a custom data source. Which TWO actions must the developer take to handle row selection and deletion correctly? (Choose two.)

Question 15hardmultiple choice

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A developer is building a Lightning Web Component that must display a custom UI in a Visualforce page using Lightning Out. The component uses the lightning/navigation module to navigate to a record page. When the component is rendered in the Visualforce page, the navigation fails. What is the most likely cause?

Question 16hardmultiple choice

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A developer is creating a Lightning Web Component that renders a list of contacts fetched imperatively with getRecord or a wire adapter. Each row has a button that opens a custom modal defined in the same component. The developer wants the modal markup to exist in the DOM only while it is open, and wants to avoid a full page navigation. Which approach best satisfies these requirements?

Question 17hardmultiple choice

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A developer is building a Lightning Web Component hosted inside a Visualforce page via lightning:container. The component needs to invoke an Apex method that returns sensitive data. The developer wants the call to run in the user's context and respect Apex sharing rules, without exposing the method to unauthenticated callers. Which approach should be used?

Question 18mediummulti select

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A developer is building a Lightning Web Component for a Lightning Experience record page that must display field values from the current record and re-render automatically whenever the user edits and saves those fields on the page. The component should not make its own Apex callout. Which TWO techniques should the developer use to meet these requirements? (Choose two.)

Question 19mediummultiple choice

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A developer is creating a Lightning Web Component that must be placed on a Lightning record page for the Case object. The component needs to read the record Id from the page context and then perform an imperative Apex call. Which approach correctly obtains the record Id in the component?

Question 20mediummulti select

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A developer is building a Lightning Web Component that displays a list of contacts and must allow the user to navigate to a selected contact's record page. The component is deployed both to Lightning Experience and to a Salesforce mobile app. Which TWO techniques are supported for performing this navigation? (Choose two.)

Question 21hardmulti select

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A developer is creating a Lightning Web Component that must render a list of contacts and allow inline editing of the phone field. The component should use base Lightning components for the form and handle the save operation with Apex. Which TWO approaches are valid for ensuring the component updates the UI after a successful save? (Choose two.)

Question 22hardmulti select

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A developer is building a Lightning Web Component that must call an Apex method imperatively and handle errors gracefully. The component needs to show a toast when the call fails and must also pass parameters to the Apex method. Which TWO practices are correct for this scenario? (Choose two.)

Question 23mediummultiple choice

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A developer is building a Lightning Web Component that is embedded inside a Visualforce page using lightning:container. The component needs to receive a String parameter named recordName from the Visualforce page. The developer has exposed a public property in the LWC. Which approach correctly passes the value from Visualforce to the LWC?

Question 24easymultiple choice

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A developer needs to display a list of accounts in a Lightning Web Component. The component should use a base Lightning component that provides built-in sorting, filtering, and column selection without custom code. Which component should the developer use?

Question 25easymultiple choice

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A developer is building a Lightning Web Component that must conditionally render a section only when a boolean property isShowDetails is true. Which template syntax correctly implements this conditional rendering?

Question 26mediummultiple choice

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A developer is building a Lightning Web Component that includes a child component. The parent needs to pass a callback so the child can notify it when a row is selected, and the child must not expose the callback in its public API documentation. Which mechanism should the developer use?

Question 27mediummultiple choice

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A developer is building a Lightning Web Component that must render a list of 500 opportunity records fetched via a wire adapter. Users report that the component becomes unresponsive when the list grows. The developer wants to render only the rows currently visible in the viewport and recycle DOM nodes as the user scrolls. Which Salesforce-provided technique should the developer implement?

Question 28easymultiple choice

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A developer needs to display a toast notification in a Lightning Web Component after a successful record update. The component uses Lightning Data Service to save the record. Which module and method should the developer use to show the toast?

Question 29mediummulti select

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A developer is creating a Lightning Web Component that must expose a public method so a parent Aura component can call it. The parent Aura component uses component.find() to locate the LWC and invoke the method. Which TWO statements are correct about this interoperability scenario? (Choose two.)

Question 30mediummultiple choice

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A developer is building a Lightning Web Component that must render a list of 5,000 Account records retrieved from an Apex controller. Users need to scroll the entire list, sort columns client-side, and select multiple rows for a bulk action. The component must load quickly and remain responsive. Which approach should the developer use?

Question 31mediummultiple choice

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A developer is building a complex nested Lightning Web Component structure. A deeply nested child component needs to notify an ancestor component, which is not the immediate parent, about a data change. Which configuration of the CustomEvent constructor should the developer use to ensure the event reaches the ancestor across the shadow DOM boundary?

Question 32mediummulti select

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A developer is tasked with internationalizing a Lightning Web Component that will be deployed globally. Which TWO Salesforce features should be used to handle locale-specific formatting and translations? (Choose TWO)

Question 33mediummultiple choice

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A developer is creating a Lightning Web Component to display a list of high-priority Opportunities. The component needs to reactively update whenever an Opportunity is updated elsewhere on the page by another component. Which approach is most efficient and requires the least amount of custom code?

Question 34easymultiple choice

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A developer wants to ensure that a Lightning Web Component is only available for use on Record Pages for the Account and Contact objects in the Lightning App Builder. How should the developer configure the component's metadata file?

Question 35hardmultiple choice

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A developer is experiencing performance issues with a Visualforce page that includes multiple complex components and a large amount of data. The page uses a standard controller with several extensions. Which technique should the developer use to reduce the view state size and improve page load time?

Question 36hardmultiple choice

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Refer to the exhibit. A developer is attempting to push source code to a scratch org and encounters the error shown. The developer confirms that 'utils.js' and 'utils.js-meta.xml' exist in the 'force-app/main/default/lwc/utils/' directory. What is the most likely cause of this error?

Exhibit

sfdx force:source:push
ERROR running force:source:push: 
LWC1011: Failed to resolve import "c/utils" from "accountDetails.js". 
Please check that the file exists and is available in the workspace.

Question 37mediummultiple choice

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A developer is building a Lightning Web Component that needs to display a formatted date and time based on the user's timezone. Which standard JavaScript object, compatible with LWC, should be used to handle this without additional libraries?

Question 38mediummultiple choice

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A developer is building a Lightning Web Component that needs to communicate with a parent component in a deep containment hierarchy. The event must traverse shadow boundaries without stopping at component boundaries. Which property configuration should the developer apply when instantiating the CustomEvent?

Question 39hardmultiple choice

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An enterprise Salesforce implementation requires a Lightning Web Component to display massive amounts of tabular data with extremely high rendering performance. The standard lightning-datatable component fails to meet performance SLAs during stress testing. Which architectural approach should the developer implement to optimize rendering performance?

Question 40mediummultiple choice

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A developer is building a Lightning Web Component for a Lightning Experience record page. The component must display a toast notification to the user after a successful save operation. The developer uses the ShowToastEvent from the lightning/platformShowToastEvent module. Which import statement is correct?

Question 41hardmultiple choice

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A developer is creating a Lightning Web Component that includes a lightning-input field for a phone number. The component must validate that the input matches a specific pattern before allowing the user to submit a form. The developer wants to use the built-in validation features of lightning-input. Which attribute should be set to enforce a custom validation pattern?

Question 42mediummultiple choice

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A developer is building a Lightning Web Component for a Lightning Experience app. The component contains a form with an <input> for a search term and a list of results. When the user types into the input, the component must call an Apex method that returns matching records. The developer observes that the Apex method is being invoked on every keystroke, causing excessive server calls. Which technique should the developer use to limit the number of Apex calls while still updating the results as the user types?

Question 43easymultiple choice

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A developer is creating a Lightning Web Component that includes a button. When the button is clicked, the component should call an Apex method to save data. Which decorator should be used to expose the Apex method to the Lightning Web Component?

Question 44hardmultiple choice

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A developer is creating a Lightning Web Component that must expose a public property so that a parent Aura component can pass a record ID into it. The LWC is embedded inside the Aura component using aura:component with an attribute. Which decorator and configuration should the developer use on the LWC property?

Question 45hardmulti select

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A developer is creating a Lightning Web Component that needs to display a list of Contacts for a given Account. The component will be placed on a Lightning record page for Account. The developer wants to use the getRelatedListRecords wire adapter from lightning/uiRelatedListApi to fetch the contacts. Which two parameters are required in the wire configuration object for getRelatedListRecords? (Choose two.)

Question 46mediummultiple choice

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A developer is building a Lightning Web Component that must expose a public method so a parent component can programmatically trigger a refresh of the child's data. The child component's method is decorated with @api and named refreshData. The parent component holds a template reference to the child element. Which code in the parent correctly invokes the child method?

Question 47mediummultiple choice

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A developer has a Lightning Web Component named accountTile that exposes a public property accountName decorated with @api. A parent Aura component includes accountTile using <c:accountTile accountName="Acme"/>. During testing, the account name never appears. The developer confirms the property is set in the LWC constructor. What is the cause?

Question 48mediummultiple choice

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A developer is building a Lightning Web Component that includes a lightning-button. The button's click handler is defined as an arrow function in the component's JavaScript file. The developer wants to pass the event object to the handler to access the event's target. Which syntax should be used in the component's HTML template to correctly bind the handler and pass the event?

Question 49mediummultiple choice

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A developer is building a Lightning Web Component that must surface a toast notification when an Apex callout returns a specific error code. The component is used inside a Salesforce mobile app and on desktop. Which module should the developer import to display the toast?

Question 50easymultiple choice

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A developer is building a Lightning Web Component that includes a button. When the button is clicked, the component must navigate the user to a specific Account record page in Lightning Experience. Which approach should the developer use?

Question 51hardmultiple choice

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A developer is building a Lightning Web Component that needs to navigate to a specific record page when a user clicks a button. The developer wants to use the NavigationMixin from lightning/navigation. The component is a child component nested inside another component, and the developer needs to ensure that the navigation works correctly. Which code snippet correctly uses NavigationMixin to navigate to an Account record page?

Question 52mediummultiple choice

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A developer is building a Lightning Web Component that must render a large list of order records retrieved from Apex. The component displays each order's formatted total, which follows the user's locale (for example, 1.234,56 € in Germany versus $1,234.56 in the US). Which approach correctly formats each order total for the current user?

Question 53hardmultiple choice

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A developer needs a Lightning Web Component to expose a public method so that an Aura component on the same page can call it and pass a string parameter. Which approach should the developer use?

Question 54hardmultiple choice

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A developer is building a Lightning Web Component that must display a toast notification when a record is saved successfully. The component uses lightning/platformShowToastEvent. Which import and usage are correct?

Question 55easymultiple choice

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A developer is creating a Lightning Web Component that needs to display a toast message when a record is saved successfully. The developer imports ShowToastEvent from lightning/platformShowToastEvent. Which code correctly dispatches a success toast with the title 'Saved' and message 'Record saved successfully'?

Question 56mediummultiple choice

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A developer is building a Lightning Web Component that must navigate the user to a new record's detail page after a successful Apex DML operation. Which module should the developer use to perform the navigation?

Question 57easymultiple choice

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A developer needs a Lightning Web Component placed on a record page to read the 18-character id of the record currently being viewed, without querying the database or calling Apex. Which approach provides this value directly?

Question 58hardmultiple choice

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A developer is building a Lightning Web Component that must expose a method to an Aura component wrapper so the Aura component can call it after a user action. The LWC method is decorated with @api and named doSomething. Which code in the Aura component correctly invokes it?

Question 59easymultiple choice

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A developer needs to display a read-only, formatted phone number on a Lightning record page. The value comes from a field on the record and should render consistently with Salesforce's standard phone formatting. Which base component should be used?

Question 60hardmultiple choice

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A developer is building a Lightning Web Component that must call an Apex method that performs a callout. The component is placed on a Lightning record page, and the Apex method is annotated with @AuraEnabled(cacheable=true). Users report that the callout never executes and an error is thrown. What is the most likely cause and the correct fix?

Question 61hardmulti select

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A developer is building a Lightning Web Component that must expose a public method callable from an Aura component on the same page. The method accepts a string and returns a promise that resolves with a boolean. Which TWO steps are required to make this method callable from the Aura parent? (Choose two.)

Question 62easymultiple choice

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A developer is creating a Lightning Web Component that will be placed on a Lightning record page for the Case object. The component must display the case's subject and status. Which approach correctly retrieves the record data so the component updates automatically when the record changes?

Question 63mediummultiple choice

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A developer is building a Lightning Web Component that renders a custom list of navigation links. The component must follow the Salesforce Lightning Design System (SLDS) styling and remain accessible to screen readers. Which approach best satisfies both the styling and accessibility requirements?

Question 64hardmultiple choice

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A developer is building a Lightning Web Component that contains an iframe hosting an external web application. The external application needs to send a message back to the Lightning Web Component when a user completes a task. Which mechanism should the developer use to receive that message securely?

Question 65mediummultiple choice

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A developer is building a Lightning Web Component that must navigate to a new record's detail page after the record is created via a custom form. The component uses NavigationMixin. Which navigation type should the developer use to navigate to the newly created record?

Question 66hardmultiple choice

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A developer has a Lightning Web Component that must call an imperative Apex method to save a record, then immediately display a toast confirming success only if the save actually succeeded. The Apex method returns a wrapper with a Boolean success flag and a message. Which imperative call pattern correctly handles both the success and error paths?

Question 67mediummultiple choice

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A developer is building a Lightning Web Component that should be embedded inside a Visualforce page. The LWC must receive a parameter passed from the Visualforce page and send an event back when a button is clicked. Which combination of features enables this integration?

Question 68hardmulti select

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A developer is building a reusable Lightning Web Component that exposes public properties and methods to its parent, and needs to fire an event the parent can handle. Which TWO techniques are valid for this parent-child interaction? (Choose two.)

Question 69easymultiple choice

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A developer needs a Lightning Web Component to navigate the user to a specific Account record's detail page when a button is clicked. Which approach is correct?