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New CRT-450 Test Tips, CRT-450 Study Group

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Salesforce Certified Platform Developer I Sample Questions (Q108-Q113):

NEW QUESTION # 108
An apex trigger fails because it exceeds governor limits. Which two techniques should a developer use to resolve the problem? Choose 2 answers

A. Use lists for all DML operations
B. Use the database class to handle DML operations
C. Use SOQL aggregate queries to retrieve child records
D. Use maps to reference related records

Answer: A,D

NEW QUESTION # 109
Which code in a Visualforce page and/or controller might present a security vulnerability?

Answer: D

NEW QUESTION # 110
A change set deployment from a sandbox to production fails due to a failure in a managed package unit test. The developer spoke with the manager package owner and they determined it is a false positive and can be ignored. What should the developer do to successfully deploy?

A. Select 'Fast Deploy' to run only the tests that are in the change set.
B. Select 'Run local tests' to run only the tests that are in the change set.
C. Select 'Run local tests' to run all tests in the org that are not in the managed package.
D. Edit the managed package's unit test.

Answer: C

NEW QUESTION # 111
Universal Containers (UC) processes orders in Salesforce in a custom object, ord=xr <. They also allow sales reps to upload CSV files with thousands of orders at a time.
A developer is tasked with integrating orders placed in Salesforce with UC's enterprise resource planning (ERP) system.
After the status for an order__ c is first set to 'Placed', the order information must be sent to a REST endpoint in the ERP system that can process one order at a time.
What should the developer implement to accomplish this?

A. Callout from a Queueable class called from a trigger
B. Callout from an Qfuture method called from a trigger
C. Callout from a Batchable class called from a scheduled job
D. Flow with a callout from an invocable method

Answer: A

Explanation:
To integrate Order__c records with the ERP system after their status is set to 'Placed', and considering that orders may be uploaded in bulk, the developer should:
Option D: Callout from a Queueable class called from a trigger
Trigger: Implement an after-update trigger on Order__c to detect when the status changes to 'Placed'.
Queueable Apex: Use Queueable Apex to handle asynchronous processing and callouts. Queueable classes support callouts by implementing the Database.AllowsCallouts interface.
Benefits:
Handles Bulk Data: Queueable Apex can process records in batches and can be chained for processing large volumes.
Supports Callouts: Unlike future methods, Queueable Apex allows for more complex data types and supports callouts with fewer limitations.
Reference:
"To make a Web service callout to an external service or API, you must use asynchronous Apex, such as future methods, Queueable Apex, or batch Apex."
"Queueable Apex is an asynchronous Apex feature that is a superset of future methods with some extra features."
- Apex Developer Guide: Queueable Apex
Why Other Options Are Incorrect:
Option A: Callout from an @future method called from a trigger
@future methods have limitations, such as accepting only primitive types as parameters and a limit of 50 calls per transaction, which can be exceeded when processing thousands of records.
"Methods with the future annotation must be static methods and can only return a void type. The specified parameters must be primitive data types, arrays of primitive data types, or collections of primitive data types."
- Apex Developer Guide: Future Methods
Option B: Callout from a Batchable class called from a scheduled job
Batch Apex is not immediately triggered by record changes and may not meet the requirement of processing the order after the status changes.
Scheduling adds delay and complexity unnecessary for this use case.
Option C: Flow with a callout from an invocable method
Flows invoked from triggers (record-triggered flows) cannot perform callouts unless they are configured to run asynchronously, and managing bulk operations with flows can be less efficient.

NEW QUESTION # 112
A developer must modify the following code snippet to prevent the number of SOQL queries issued from exceeding the platform governor limit. public class without sharing OpportunityService( public static List<OpportunityLineItem> getOpportunityProducts(Set<Id> opportunityIds){ List<OpportunitylineItem> oppLineItems = new List<OpportunityLineItem>(); for(Id thisOppId : opportunityIds){ oppLineItems.addAll([Select Id FROM OpportunityLineItems WHERE OpportunityId = :thisOppId)]; } return oppLineItems; } } The above method might be called during a trigger execution via a Lightning component. Which technique should be implemented to avoid reaching the governor limit?

A. Use the System.Limits.getlimitQueries() method to ensure the number of queries is less than 100.
B. Use the System.Limits.getQueries() method to ensure the number of queries is less than 100.
C. Refector the code above to perform the SOQL query only if the Set of opportunityIds contains less 100 Ids.
D. Refactor the code above to perform only one SOQL query, filtering by the Set of opportunityIds.

Answer: D

Explanation:
The code snippet above is not bulkified, meaning it does not handle multiple records efficiently. It performs a SOQL query inside a for loop, which can quickly hit the governor limit of 100 SOQL queries per transaction.
The best technique to avoid reaching the governor limit is to refactor the code above to perform only one SOQL query, filtering by the Set of opportunityIds. This way, the code will retrieve all the OpportunityLineItems related to the given opportunityIds in one query, and avoid unnecessary iterations and queries.
References:
* Apex Developer Guide on Bulkifying Code (1)
* Apex Developer Guide on SOQL For Loops (2)
* Apex Developer Guide on System.Limits Class (3)

NEW QUESTION # 113
......

The Salesforce Certified Platform Developer I CRT-450 certification is a valuable credential earned by individuals to validate their skills and competence to perform certain job tasks. Your Salesforce Certified Platform Developer I CRT-450 certification is usually displayed as proof that you’ve been trained, educated, and prepared to meet the specific requirement for your professional role. The Salesforce Certified Platform Developer I CRT-450 Certification enables you to move ahead in your career later.

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