Which three approaches should a developer implement to obtain the best performance for data retrieval when building a Lightning web component? Choose 3 answers

Use lazy load for occasionally accessed data.

Use the Lightning Data Service.

An org has a requirement that an Account must always have one and only one Contact listed as Primary. So, selecting one Contact will de-select any others. The client wants a checkbox on the Contact called 'Is Primary' to control this feature. The client also wants to ensure that the last name of every Contact is stored entirely in uppercase characters. What is the optimal way to implement these requirements?

Write a single trigger on Contact for both after update and before update and callout to helper classes to handle each set of logic.

Consider the controller code below that is called from an Aura component and returns data wrapped in a class. public class myserverSideController { @AuraEnabled Public static MyDataWrapper getSomeData { String theType) { Some_Object_c someobj =[ SELECT ID, Name FROM Some_object_c WHERE Type__C =: theType LIMIT 1 ]; Another_object_c anotherobj = [ SELECT ID, option_c FROM Another object_c WHERE Some_object_C-=: someobj.Name LIMIT 1 ]; MyDatawzapper theData = new MyDataWrapper(); theData.Name -=someobj. Name; theData.option = anotherobj.option_c; return theData; } public class MyDataWrapper { public String Name {get; set;} The developer verified that the queries return a single record each and there is error handling in the Aura component, but the component is not getting anything back when calling the controller get some Data. What is wrong?

The member's Name and option of the class MyDataWrapper should be annotated with @AuraEnabled also.

Which scenario requires a developer to use an Apex callout instead of Outbound Messaging?

The target system uses a REST API.

A developer wants to write a generic Apex method that will compare the Salesforce Name field between any two object records. For example, to compare the Name field of an Account and an opportunity; or the Name of an Account and a Contact Assuming the Name field exists, how should the developer do this?

Cast each object into an sObject and use sobject.get('Name') to compare the Name fields.

Which use case can be performed only by using asynchronous Apex?

Calling a web service from an Apex trigger

A company has a custom object, Order_c, that has a custom picklist field, Status_c, with values of 'New,' 'In Progress,' or 'Fulfilled' and a lookup field, Contact_c, to Contact. Which SOQL query will return a unique list of all the contact records that have no 'Fulfilled' Orders?

SELECT Id FROM Contact WHERE ID NOT IN (SELECT Contact__c FROM Order__c WHERE status_c =’Fulfilled’)

A developer wants to integrate invoice and invoice line data into Salesforce from a custom billing system. The developer decides to make real-time callouts from the billing system using the SOAP API. Unfortunately, the developer is getting a lot of errors when inserting the invoice line data because the invoice header record does not exist yet. What will help ensure the transactional integrity of the Integration?

Create the invoice header and the related invoice lines in the same create() call leveraging External Ids.

What are three reasons that a developer should write Jest tests for Lightning web components? Choose 3 answers

To verify that events fire when expected

To verify the DOM output of a component

A developer created and tested a Visualforce page in their developer sandbox, but now receives reports that user encounter view state errors when using it in production. What should the developer ensure to correct these errors?

Ensure variables are marked as transient.

What are three benefits of using static resources in Visualforce and Aura components? Choose 3 answers

Relative paths can be used in files in static resource archives to refer to other content within the archive.

Static resource files can be packaged into a collection of related files in a zip or jar archive

Static resource files can be referenced by using the @Resource global variable instead of hardcoded IDs.

Salesforce users consistently receive a "Maximum trigger depth exceeded" error when saving an Account. How can a developer fix this error?

Use a helper class to set a Boolean to TRUE the first time a trigger is fired, and then modify the trigger to only fire when the Boolean is FALSE.

A company has a custom component that allows users to search for records of a certain object type by invoking an Apex Controller that returns a list of results based on the user's input. When the search is completed, a search Complete event is fired, with the results put in a results attribute of the event. The component is designed to be used within other components and may appear on a single page more than once. What is the optimal code that should be added to fire the event when the search has completed?

var evt =$A.get("e.c.searchComplete"); evt.setParams ([results: results]); evt.fire ();

A developer wrote a test class that successfully asserts a trigger on Account. It fires and updates data correctly in a sandbox environment. A Salesforce admin with a custom profile attempt to deploy this trigger via a change set into the production environment, but the test class fails with an insufficient privileges error. What should a developer do to fix the problem?

Add system.runast() to the test class to execute the trigger as a user with the correct object permissions.

Given a list of Opportunity records named opportunity List, which code snippet is best for querying all Contacts of the Opportunity's Account?

List <Contact> contactList = new List Contact>(); Set <accountIds - new Set (); for (Opportunity o: opportunitylist) { accountIds.add(o.AccountId); } for (Account a: [SELECT id, (SELECT ID FROM Contacts) FROM Account WHERE ID IN : accountIds]){ contactList.addAll(a.Contacts): }

A developer wishes to improve runtime performance of Apex calls by caching results on the client. What is the most efficient way to implement this?

Decorate the server-side method with @AuraEnabled (cacheable=true).

Given the following containment hierarchy: <! - - myParentComponent.html - - > <template> <c-my-child-component> </template> What is the correct way to communicate the new value of a property named "passthrough to myparentcomponent if the property is defined within my-child-component?

let cEvent = new customEvent('passthrough', { detail: this.passthrough }); this.dispatchEvent (cEvent);

@isTest static void testUpdateSuccess() { Account acct = new Account (Name = 'test') insert acct; // Add code here extension.inputValue = 'test; PageReference pageRef = extension.update(); System.assertNotEquals(null, pageRef); } What should be added to the setup, in the location indicated, for the unit test above to create the controller extension for the test?

ApexPages. StandardController sc = new ApexPages.standardController (acct); AccountControllerExt extension = new AccountControllerExt(sc);

Part of a custom Lightning Component displays the total number of Opportunities in the org, which is in the millions. The Lightning Component uses an Apex Controller to get the data it needs. What is the optimal way for a developer to get the total number of Opportunities for the Lightning Component?

COUNT() SOQL aggregate query on the Opportunity object

Universal Containers (UC) wants to develop a customer community to help their customers log issues with their containers. The community needs to function for their German- and Spanish-speaking customers also. UC heard that it's easy to create an international community using Salesforce, and hired a developer to build out the site. What should the developer use to ensure the site is multilingual?

Use Custom Labels to ensure custom messages are translated properl

How should a developer assert that a trigger with an asynchronous process has successfully run?

Create all test data in the test class, invoke Test.startTest) and Test.stopTest() and then perform assertions

Universal Containers needs to integrate with a Heroku service that resizes product images submitted by users. What are two alternatives to implement the integration and protect against malicious calls to the Heroku app's endpoint? Choose 2 answers

Create a trigger that uses an @future Apex HTTP callout passing JSON serialized data and some form of pre-shared secret key, so that the Heroku app can authenticate requests and store the resized images in Salesforce

Create a workflow rule with an outbound message and select Send Session ID so that the Heroku app can use it to send the resized images back to Salesforce

There are user complaints about slow render times of a custom data table within a Visualforce page that loads thousands of Account records at once. What can a developer do to help alleviate such issues?

Use the standard Account List controller and implement pagination

A developer is building a Lightning web component to get data from an Apex method called getData that takes a parameter, name. The data should be retrieved when the user clicks the Load Data button. import LightningElement from 'lwc'; import getData from 'salesforce/apex/AccountInfo.getData'; export default class Account Info extends LightningElement { account; name; nameChanged (evt) { this.name = evt. target.value; } loadData() {} } Component Markup Snippet: <lightning-button label=”Load data” onclick={loaddata} > </lightning-button> <lightning-input type=”text” label=”Name” value={name} onchange={nameChanged}></lightninginput> What must be added to get the data?

Add getDataname({ this.name }). then (result => this.account = result; }); to the loadData() function.

A developer wants to call an Apex server-side controller from an Aura component. What are two limitations to the data being returned by the controller? Choose 2 answers

Answer: Basic data types are supported, but defaults, such as maximum size for a number, are defined by the objects that they map to.

A custom Apex class can be returned, but only the values of public instance properties and method annotated with Aura Enabled are serialized and returned.

Universal Containers uses Big Objects to store almost a billion customer transactions called Customer_Transaction_b. These are the fields on Customer_Transaction_b: Account_c Program_c Points_Earned_c Location_c Transaction_Date__c The following fields have been identified as Index Fields for the Customer_Transaction_b object: Account__c, Program__c, and Transaction_Date_c. Which SOQL query is valid on the Customer_Transaction_b Big Object?

SELECT Account_c, Program_c, Transaction_Date_c FROM Customer_Transaction__c WHERE Account_c=’ 001R00000030203’ AND Program_c=’Shoppers’ AND Transaction_Date_c=2019-05-31T00:00Z

The Account edit button must be overridden in an org where a subset of users still use Salesforce Classic. The org already has a Lightning Component that will do the work necessary for the override, and the client wants to be able to reuse it. How should a developer implement this?

Override the edit button for Lightning with a Lightning Component; and for Classic, override the edit button with a Visualforce page that contains the Lightning Component.

A developer is creating a Lightning web component that can be added to a Lightning App Page and displayed when the page is rendered in desktop and mobile phone format. To ensure a great mobile experience, the developer chooses to use the SLDS grid utility. Which two Lighting web components should the developer implement to ensure the application is mobileready? Choose 2 answers

<lightning-layout></lightning-layout>

<lightning-layout-item></lightning-layout-item>

A company's support process dictates that any time a Case is closed with a Status of 'Could not fix,' an Engineering Review custom object record should be created and populated with information from the case, the Contact, and any of the Products associated with the case. What is the correct way to automate this using an Apex trigger?

An after update trigger that creates the Engineering Review record and inserts it

Which statement is true regarding savepoints?

: Static variables are not reverted during a rollback

As part of a custom development, a developer creates a Lightning component to show how a particular opportunity progresses over time. The component must display the date stamp when any of the following fields change: • Amount, Probability, Stage, or Close Date How should the developer access the data that must be displayed?

Execute a SOQL query for Amount, Probability, Stage, and close Date on the Opportunity History object

A developer is building a Lightning web component that displays quantity, unit price, and the total for an order line item. The total is calculated dynamically as the quantity multiplied by the unit price. JavaScript: import ( LightningElement } from 'lwc'; export default class OrderLineItem extends LightningElement { @api quantity; @api unitPrice; } Template Markup: <template> <div> Quantity : {quantity} <Unit Price:{unitPrice} <br/> </template> What must be added to display the total?

Add get total() { return quantity * unitPrice; ) to the JavaScript and Total: [total] in the template

Universal Containers allows customers to log into a Salesforce Community and update their orders via a custom Visualforce page. Universal Containers' sales representatives can edit the orders on the same Visualforce page. What should a developer use in an Apex test class to test that record sharing is enforced on the Visualforce page?

Use System.runAs() to test as a sales rep and a community user

A large company uses Salesforce across several departments. Each department has its own Salesforce Administrator. It was agreed that each Administrator would have their own sandbox in which to test changes. Recently, users notice that fields that were recently added for one department suddenly disappear without warning. Also, Workflows that once sent emails and created tasks no longer do so. Which two statements are true regarding these issues and resolution? Choose 2 answers

The administrators are deploying their own Change Sets over each other, thus replacing entire Page Layouts and Workflows in Production.

A sandbox should be created to use as a unified testing environment instead of deploying Change Sets directly to production

Universal Containers needs to integrate with their own, existing, internal custom web application. The web application accepts JSON payloads, resizes product images, and sends the resized images back to Salesforce. What should the developer use to implement this integration?

A platform event that makes a callout to the web application

A developer is trying to decide between creating a Visualforce component or a Lightning component for a custom screen. Which functionality consideration impacts the final decision?

Does the screen need to be rendered as a PDF without using a third-party application

Assuming the CreateOneAccount class creates one account and implements the Queueable interface, which syntax properly tests the Apex code?

List<Account> accts; Test.startTest(); System.enqueueJob ( new CreateOneAccount()); Test.stopTest(); accts = [SELECT ID FROM Account]; System.assertEquals( 1, accts.size() );

A developer is inserting, updating, and deleting multiple lists of records in a single transaction and wants to ensure that any error prevents all execution. How should the developer implement error exception handling in their code to handle this?

Use Database. set Savepoint() and Database.rollBack () with a try-catch statement

A developer is writing a Visualforce page that queries accounts in the system and presents a data table with the results. The users want to be able to filter the results based on up to five fields, that will vary according to their selections when running the page. Which feature of Apex code is required to facilitate this solution?

Dynamic Schema binding/variable binding

PD2-2

Authored by Nicole Vanela

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MULTIPLE SELECT QUESTION

1 min • 1 pt

<lightning:button label="Save" onclick="{!c.handleSave}"/> ({({ handleSave : function (component, event, helper) { helper. saveAndRedirect (component); } }) A company has the Lightning Component above that allows users to click a button to save their changes and redirects them to a different page. Currently, when the user hits the Save button the records are getting saved, but they are not redirected. Which three techniques can a developer use to debug the JavaScript? Choose 3 answers

: Enable Debug Mode for Lightning components for the user.

Use the browser's dev tools to debug the JavaScript.

Use console.log() messages in the JavaScript.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Refer to the markup below: <Template> <!---- other code ----- > <lightning-record-form record-id={recordId} object-apiname="Account" layout-type="Full"> </lightning-record-form> </template> A Lightning web component displays the Account name and two custom fields out of 275 that exist on the object. The custom fields are correctly declared and populated. However, the developer receives complaints that the component performs slowly. What can the developer do to improve the performance?

: Replace layout-type="Full" with fields={fields}

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A managed package uses a list of country ISO codes and country names as reference data in many different places from within the managed package Apex code. What is the optimal way to store and retrieve the list?

Store the information in custom metadata and access it with the getall() method.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which interface needs to be implemented by an Aura component so that it may be displayed in modal dialog by clicking a button on a Lightning record page?

force: lightning QuickAction

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

@isTest Static void testMyTrigger() { //Do a bunch of data setup Datafactory.setupDataForMyTriggerTest(); List<Account> acctsBefore = [Select Is_Customer__c FROM Account where id in : Datafactory.Accounts]; //Utility to asser all accounts are not customers before the update AssertUtil.assertNotCustomers(acctBefore); For(Account a : Datafactory.accounts) { a.Is_Customer__c=true; } Update Datafactory.accounts; List acctsAfter = [select Number_Of_Transfers__c from account where id in :DataFactory.accounts]; //Utility to assert Number_of Transfers_c is correct based on data AssertUtil.assertNumberOfTransfers(acctsAfter); The test method above tests an Apex trigger that the developer knows will make a lot of queries when a lot of Accounts are simultaneously updated to be customers. The test method fails at the line 20 because of too many soql queries.

Add Test.startTest() before line 18 of the code and add Test.stopTest() after line 18 of the code.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A developer created a Lightning web component that uses a lightning-record-edit-form to collect information about Leads. Users complain that they only see one error message at a time about their input when trying to save a Lead record. What is the recommended approach to perform validations on more than one field, and display multiple error messages simultaneously with minimal JavaScript intervention?

External JavaScript library

MULTIPLE SELECT QUESTION

45 sec • 1 pt

company uses their own custom-built enterprise resource planning (ERP) system to handle order management. The company wants Sales Reps to know the status of orders so that if a customer calls to ask about their shipment, the Sales Rep can advise the customer about the order's status and tracking number if it has shipped. Which two methods can make this ERP order data visible in Salesforce? Choose 2 answers

Use Salesforce Connect to view real-time Order data in the ERP system

Have the ERP system push the data into Salesforce using the SOAP API.

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PD2-2

A managed package uses a list of country ISO codes and country names as reference data in many different places from within the managed package Apex code. What is the optimal way to store and retrieve the list?

Which interface needs to be implemented by an Aura component so that it may be displayed in modal dialog by clicking a button on a Lightning record page?

Which three approaches should a developer implement to obtain the best performance for data retrieval when building a Lightning web component? Choose 3 answers

Which tag should a developer use to display different text while an processing an action?

Access all questions and much more by creating a free account

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