PD2 practice questions 181–190

1. Question 181 · 279 in bank

   A developer is asked to find a way to store secret data with an ability to specify which profiles and users can access which secrets. What should be used to store this data?

   • AStatic resources
   • BCustom metadata
   • CCustom settings
   • DSystem.Cookie class

   Show answer

   Answer: B

   Explanation

   It should be Custom setting. Option C. Its at the end of the article. https://trailhead.salesforce.com/content/learn/modules/secure-secrets-storage/protect-secrets-using-platform-features You want to specify which profiles and users can access which secrets. Metadata types don’t offer the granularity of the custom settings hierarchy types, which allow you to specify to which profiles or users the secrets should be available. That’s why it is better to use a custom setting here.

   Source: Adapted from community discussion — Sri0507

   References

   • trailhead.salesforce.com documentation
   • developer.salesforce.com documentation

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2. Question 182 · 279 in bank

   Select 3

   What are three reasons that a developer should write Jest tests for Lightning web components? (Choose three.)

   • ATo verify the DOM output of a component
   • BTo verify that events fire when expected
   • CTo test a component's non-public properties
   • DTo test basic user interaction
   • ETo test how multiple components work together

   Show answer

   Answer: ABD

   Explanation

   ABD. Write Jest tests to: Test a component in isolation Test a component’s public API (@api properties and methods, events) Test basic user interaction (clicks) Verify the DOM output of a component Verify that events fire when expected

   Source: Adapted from community discussion — RegNav

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3. Question 183 · 279 in bank

   A developer created the following test method:

   

   The developer org has five accounts where the name starts with "Test". The developer executes this test in the Developer Console. After the test code runs, which statement is true?

   • AThe test will fail.
   • BThere will be no accounts where the name starts with "Test".
   • CThere will be five accounts where the name starts with "Test".
   • DThere will be six accounts where the name starts with "Test".

   Show answer

   Answer: B

   Explanation

   I tested it. B is correct. The actual accounts will not be deleted but after delete operation in the test class it will return size as 0

   Source: Adapted from community discussion — goldy_666

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4. Question 184 · 279 in bank

   A company represents their customers as Accounts that have an External ID field called Customer_Number__c. They have a custom Order (Order__c) object, with a Lookup to Account, to represent Orders that are placed in their external order management system (OMS). When an order is fulfilled in the OMS, a REST call to Salesforce should be made that creates an Order record in Salesforce and relates it to the proper Account. What is the optimal way to implement this?

   • APerform a REST GET on the Account and a REST POST to update the Order__c with the Account's record ID.
   • BPerform a REST PATCH to upsert the Order__c and specify the Account's Customer_Number__c in it.
   • CPerform a REST POST to update the Order__c and specify the Account's Customer_Number__c in it.
   • DPerform a REST GET on the Account and a REST PATCH to upsert the Order__c with the Account's record ID.

   Show answer

   Answer: B

   Explanation

   B is Correct. Body example: { "Name" : "Order name", "Price__c": "100$", "Account__r" : { "Customer_Number__c" : 123 } } Reference : https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/dome_upsert.htm

   Source: Adapted from community discussion — santo_aj

   References

   • developer.salesforce.com documentation

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5. Question 185 · 279 in bank

   Instead of waiting to send emails to support personnel directly from the finish method of a batch Apex process, Universal Containers wants to notify an external system in the event that an unhandled exception occurs. What is the appropriate publish/subscribe logic to meet this requirement?

   • APublish the error event using the addError() method and write a trigger to subscribe to the event and notify the external system.
   • BPublish the error event using the addError() method and have the external system subscribe to the event using CometD.
   • CPublish the error event using the Eventbus.publish() method and have the external system subscribe to the event using CometD.
   • DNo publishing is necessary. Have the external system subscribe to the BatchApexErrorEvent.

   Show answer

   Answer: D

   References

   • developer.salesforce.com documentation
   • developer.salesforce.com documentation

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6. Question 186 · 279 in bank

   Users report that a button on a custom Lightning web component is not working. However, there are no other details provided. What should the developer use to ensure error messages are properly displayed?

   • AAdd the tag to the component.
   • BAdd a try-catch block surrounding the DML statement.
   • CUse the Database method with allOrNone set to false.
   • DAdd JavaScript and HTML to display an error message.

   Show answer

   Answer: D

   Explanation

   D. This is because Lightning web components can use JavaScript and HTML to handle errors from various sources, such as Lightning Data Service, Apex methods, or child components(1). The developer can use the errorCallback() lifecycle hook to catch errors in the component or its children, and use the lightning-formatted-rich-text element to display the error message in a user-friendly way. 1: https://developer.salesforce.com/blogs/2020/08/error-handling-best-practices-for-lightning-web-components B is not correct, because this option assumes that the error is caused by a DML statement in an Apex method. However, the question does not specify what the button does or what kind of error occurs. Moreover, a try-catch block in Apex would only handle the error on the server side, but not display it on the client side.

   Source: Adapted from community discussion — moitam

   References

   • developer.salesforce.com documentation

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7. Question 187 · 279 in bank

   A developer is creating a Lightning web component that displays a list of records in a lightning-datatable. After saving a new record to the database, the list is not updating.

   

   What should the developer change in the code above for this to happen?

   • AAdd the @track decorator to the data variable.
   • BCreate a new variable to store the result and annotate it with @track.
   • CCreate a variable to store the result and call refreshApex().
   • DCall refreshApex() on this.data.

   Show answer

   Answer: D

   Explanation

   Isn't it D? Because records is a wire function and assigns the result to this.data. So, this.data is the variable currently holding the displayed data.

   Source: Adapted from community discussion — BrucePark

   References

   • developer.salesforce.com documentation

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8. Question 188 · 279 in bank

   A developer created a Lightning web component that allows users to input a text value that is used to search for Accounts by calling an Apex method. The Apex method returns a list of AccountWrappers and is called imperatively from a JavaScript event handler.

   

   Which two changes should the developer make so the Apex method functions correctly? (Choose two.)

   • AAdd @AuraEnabled to line 09.
   • BAdd @AuraEnabled to line 03.
   • CAdd @AuraEnabled to lines 11 and 12.
   • DAdd @AuraEnabled to line 01.

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   Answer: B

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9. Question 189 · 279 in bank

   A developer wrote a class named AccountHistoryManager that relies on field history tracking. The class has a static method called getAccountHistory that takes in an Account as a parameter and returns a list of associated AccountHistory object records. The following test fails:

   

   What should be done to make this test pass?

   • AThe test method should be deleted since this code cannot be tested.
   • BCreate AccountHistory records manually in the test setup and write a query to get them.
   • CUse Test.isRunningTest() in getAccountHistory() to conditionally return fake AccountHistory records.
   • DUse @isTest (SeeAllData=true) to see historical data from the org and query for AccountHistory records.

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   Answer: C

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10. Question 190 · 279 in bank

    Select 2

    A developer recently released functionality to production that performs complex commission calculations in Apex code called from an Opportunity trigger. Users report that the calculations seem incorrect because the values they see for commissions are wrong. The developer has representative test data in their developer sandbox. Which three tools or techniques should the developer use to execute the code and pause it at key lines to visually inspect values of various Apex variables? (Choose two.)

    • AApex Replay Debugger
    • BVisual Studio Code
    • CWorkbench
    • DDeveloper Console
    • EBreakpoints

    Show answer

    Answer: AB

    Explanation

    The question mentions "which three tools or techniques," so using [B. Visual Studio Code]'s [A. Apex Replay Debugger] to set up [E. Breakpoints] for inspection seems to be the correct answer.

    Source: Adapted from community discussion — [Removed]

    References

    • developer.salesforce.com documentation
    • Salesforce Help

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PD2 practice, question 181. 279 questions available.