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Salesforce CRT-450 exam covers a wide range of topics related to the Salesforce platform, including Apex programming, data modeling, security and access, and user interface development. CRT-450 Exam consists of 60 multiple-choice questions that must be completed within 105 minutes. To pass the exam, candidates must score at least 68% or higher.

Salesforce Certified Platform Developer I Sample Questions (Q237-Q242):

NEW QUESTION # 237
Consider the following code snippet:
public static List<Lead> obtainAllFields(Set<Id> leadIds) {
List<Lead> result = new List<Lead>();
for (Id leadId : leadIds) {
result.add([SELECT FIELDS(ALL) FROM Lead WHERE Id = :leadId]);
}
return result;
}
Given the multi-tenant architecture of the Salesforce platform, what is a best practice a developer should implement to ensure successful execution of the method?

Answer: C

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
The provided code runs a SOQL query inside a for loop, which violates Salesforce's governor limit of 100 SOQL queries per transaction. To avoid hitting these limits, the best practice is to perform queries outside of loops by using a single query that retrieves all required records at once.
Reference:
Bulkification Best Practices


NEW QUESTION # 238
A developer must build application that tracks which Accounts have purchase specific pieces of equal products. Each Account could purchase many pieces of equipment.
How should the developer track that an Account has purchased a piece of equipment.

Answer: D


NEW QUESTION # 239
A developer wrote Apex code that calls out to an external system using REST API.
How should a developer write the test to prove the code is working as intended?

Answer: A

Explanation:
When writing tests for Apex code that performs callouts to external services, Salesforce requires that callouts are mocked to ensure that tests do not depend on external systems and to allow for consistent and predictable test results.
Correct Option:
Option D: Write a class that implements HttpCalloutMock.
True.
To test HTTP callouts, you implement the HttpCalloutMock interface and provide a fake response for the HTTP request.
This mock response is then used in your test methods to simulate the callout.
The test method uses Test.setMock to set the mock class.
WebServiceMock is used for testing SOAP callouts, not REST (HTTP) callouts.
Since the code uses REST API, HttpCalloutMock is appropriate.
HttpCalloutMock is an interface, not a class. You cannot extend an interface; you implement it.
The correct approach is to implement the HttpCalloutMock interface.
Reference:
Testing HTTP Callouts by Implementing HttpCalloutMock
Incorrect Options:
Option A & C: Write a class that implements or extends WebServiceMock.
False.
Testing SOAP Callouts
Option B: Write a class that extends HttpCalloutMock.
False.
Interface vs. Class
Conclusion:
To properly test REST API callouts in Apex, you should write a class that implements HttpCalloutMock and use it in your test methods.


NEW QUESTION # 240
What will be the output in the debug log in the event of a QueryExeption during a call to the @query method in the following Example?

Answer: C


NEW QUESTION # 241
What are two considerations for custom Apex Exception classes? Choose 2 answers.

Answer: A,D


NEW QUESTION # 242
......

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