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| Section | Objectives |
|---|---|
| Integration and APIs | - Platform events and messaging
|
| Data Modeling and Management | - Advanced data modeling
|
| Application Development | - Advanced Apex programming
|
| Testing and Deployment | - Deployment lifecycle
|
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問題 #117
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?
答案：B
解題說明：
The correct SOQL query to return a unique list of Contact records that have no 'Fulfilled' Orders is one that selects Ids from the Contact object where the Contact Id is not in the set of Contact Ids related to 'Fulfilled' Orders. This is done by a subquery that selects the Contact__c field from the Order__c records where the Status__c is 'Fulfilled'.
問題 #118
The Account object has a field, Audit_Code_c, that is used to specify what type of auditing the Account needs and a Lookup to User, zudizar_c, that is the assigned auditor. When an Account is initially created, the user specifies the Audit_Code c. Each User in the org has a unique text field, Audit_Code _e, that is used to automatically assign the correct user to the Account's Auditor_c field.
What should be changed to most optimize the code's efficiency? Choose 2 answers
答案：A,C
解題說明：
To optimize the code's efficiency when assigning users to the Account's Auditor field based on the audit code, the following changes should be considered:
B . Building a map of audit code to accounts (Map<string, List<Account>>) would allow for efficient grouping of accounts by their audit code. This would make it easier to process accounts with the same audit code in a single operation, reducing the number of SOQL queries and DML operations needed.
D . Adding a WHERE clause to the SOQL query to filter on audit codes would limit the number of records returned by the query. This means the code only processes relevant User records with matching audit codes, thereby reducing the processing time and memory consumption.
Option A is not recommended because querying for all distinct audit codes without any context of the accounts being processed could be inefficient. Option C is less effective because it would involve creating a mapping of Account Ids to audit codes, which doesn't aid in the efficient assignment of auditor to accounts.
Salesforce Developer Guide on Maps: Apex Maps
Salesforce Developer Guide on SOQL Queries: SOQL SELECT Syntax
問題 #119
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?
答案：C
解題說明：
In a scenario where an integration requires making a callout to an external web application, Apex is often used to perform callouts. The callout must be asynchronous when being made from a trigger because a callout cannot be made from a synchronous operation like a trigger due to the possibility of long-running transactions.
Option A (An Apex trigger that calls an @future method that allows callouts) is correct because it enables the trigger to perform an asynchronous callout to the external web application, which is necessary for sending JSON payloads and receiving the resized images.
Options B, C, and D do not fit the requirement as well as option A because platform events and flows are typically not used for making direct callouts to external systems in the context described.
Apex Developer Guide: Apex Web Services and Callouts
問題 #120
An org has an existing process, built using Process Builder, on Opportunity that sets a custom field, CommissionBaseAmount__c, when an Opportunity is edited and the Opportunity's Amount changes.
A developer recently deployed an Opportunity before update trigger that uses the CommissionBaseAmount__c and complex logic to calculate a value for a custom field, CommissionAmount__c, when an Opportunity stage changes to Closed/Won.
Users report that when they change the Opportunity to Closed/Won and also change the Amount during the same save, the CommissionAmount__c is incorrect.
Which action should the developer take to correct this problem?
答案：A
解題說明：
The issue described is likely due to the order of execution in Salesforce, where processes in Process Builder run after all before triggers. If the Opportunity's Amount is changed and the CommissionBaseAmount__c is set by Process Builder, the trigger that calculates CommissionAmount__c may not see the updated value if it operates before the process.
Replacing the process with a before-save record-triggered flow (formerly known as Fast Field Update) would ensure that CommissionBaseAmount__c is updated before the trigger runs. In a before-save flow, field updates occur before any Apex before update triggers fire, which means the trigger would have the updated value of CommissionBaseAmount__c to use in its calculation.
eferences:
Order of Execution in Salesforce
Before-Save Record-Triggered Flows
問題 #121
Which three approaches should a developer implement to obtain the best performance for data retrieval when building a Lightning web component? Choose 3 answers
答案：A,D,E
解題說明：
Lazy loading improves performance by loading data only when needed.
Lightning Data Service (LDS) handles data operations and caching efficiently.
Using {Cacheable=true} on Apex methods enables the Lightning Component framework to cache the method's return value, reducing server round-trips for the same data.
Lightning Web Components Developer Guide
問題 #122
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