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Salesforce CRT-450 시험은 Apex와 Visualforce를 사용하여 맞춤형 애플리케이션을 구축하는 개발자의 지식과 기술을 테스트하기 위해 설계되었습니다. 이 시험은 또한 Salesforce 데이터 모델, 보안 모델 및 플랫폼의 선언적 사용자 정의 능력을 이해하는 개발자를 시험합니다. Salesforce CRT-450 시험에 통과하면 개발자가 고객의 요구에 부응하는 맞춤형 애플리케이션을 구축할 수 있는 능력을 입증할 수 있습니다.

Salesforce CRT-450은 Salesforce 플랫폼에서 사용자 정의 애플리케이션을 설계하고 개발하는 데있어 지식과 기술을 시연하려는 전문가를 위해 설계된 인증 시험입니다. 이 시험은 Salesforce 플랫폼을 사용하여 애플리케이션을 구축 한 경험이 있고 해당 분야의 전문 지식을 검증하려는 개발자를위한 것입니다.

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최신 Salesforce Developers CRT-450 무료샘플문제 (Q65-Q70):

질문 # 65
Universal Containers has a Visualforce page that displays a table of every Container_c. being ....... Is falling with a view state limit because some of the customers rent over 10,000 containers.
What should a developer change about the Visualforce page to help with the page load errors?

A. Implement pagination with an OffsetController.
B. Use Lazy loading and a transient List variable.
C. Implement pagination with a StandardSetController,
D. Use JavaScript remoting with SOQL Offset.

정답：C

설명：
The correct answer is D because it uses the StandardSetController class, which provides built-in pagination support for Visualforce pages. The StandardSetController can be initialized with a list of sObjects, a SOQL statement, or the ID of a filter. It also provides methods to navigate through the pages of data, such as first(), last(), next(), and previous(). By using the StandardSetController, the developer can avoid hitting the view state limit, which is 135 KB for Visualforce pages. The view state is the amount of data that is persisted between page requests. It includes the component tree, component attributes, and controller state. The StandardSetController reduces the view state size by storing only the current page of data in the view state, and not the entire data set.
The other options are incorrect because they do not provide an efficient or reliable way to implement pagination for Visualforce pages. Option A uses lazy loading and a transient list variable, which are not recommended for pagination. Lazy loading is a technique that defers loading data until it is needed, which can improve the initial page load time, but it can also cause performance issues if the data set is large or complex.
A transient list variable is a variable that is not stored in the view state, which can reduce the view state size, but it can also cause data loss or inconsistency if the page is refreshed or redirected. Option B uses JavaScript remoting with SOQL offset, which is not a good practice for pagination. JavaScript remoting is a technique that allows Visualforce pages to communicate with Apex controllers using asynchronous JavaScript calls.
SOQL offset is a clause that allows skipping a specified number of rows in a query result. However, JavaScript remoting has some limitations, such as the maximum size of the response payload (15 MB) and the maximum number of remoting calls per page (10). SOQL offset also has some limitations, such as the maximum offset value (2,000) and the performance impact of skipping many rows. Option C implements pagination with an OffsetController, which is a custom controller that uses the SOQL offset clause to paginate the data. This option has the same drawbacks as option B, as it relies on the SOQL offset clause, which is not a scalable or performant solution for pagination. References:
* Trailhead: Pagination with a StandardSetController
* Trailhead: Visualforce View State
* Salesforce Developer Guide: StandardSetController Class
* [Salesforce Developer Guide: JavaScript Remoting for Visualforce]
* [Salesforce Developer Guide: SOQL OFFSET Clause]

질문 # 66
Which code statement includes an Apex method named updateAccounts in the class AccountController for use in a Lightning web component?

A. import updateAccounts from "@salesforce/apex/AccountController.updateAccounts";
B. import updateAccounts from "AccountControlles';
C. import updateAccounts from "Account@ontroller.updateAccounts';
D. import updateAccounts from "Salesforce/apex/AccountController:';

정답：D

질문 # 67
Why would a developer consider using a custom controller over a controller extension?

A. To increase the SOQL query governor limits.
B. To implement all of the logic for a page and bypass default Salesforce functionality
C. To leverage built-in functionality of a standard controller
D. To enforce user sharing settings and permissions

정답：B

질문 # 68
A developer creates a custom exception as shown below:
public class ParityException extends Exception. {}
What are two ways the developer can fire the exception in Apex? Choose 2 answers

A. new parityException. ('parity does not match');
B. new ParityExcaption () ;
C. throw new ParityException() ;
D. throw new ParityException ('parity docs not match');

정답：C,D

설명：
To fire an exception in Apex, the developer must use the throw statement along with an instance of the exception.
Option A: throw new ParityException();
Correct Way.
Creates a new instance of ParityException with no message and throws it.
Syntax is correct for throwing an exception.
Option C: throw new ParityException('parity does not match');
Correct Way.
Creates a new instance of ParityException with a custom message and throws it.
The exception class inherits from Exception, which allows passing a message to the constructor.
Options Not Correct:
Option B: new ParityException('parity does not match');
Incorrect.
This statement creates a new instance of ParityException but does not throw it.
Without the throw keyword, the exception is not fired.
Option D: new ParityException();
Incorrect.
Similar to Option B, this creates a new instance but does not throw it.
The exception will not affect the flow unless it is thrown.
Conclusion:
The two ways the developer can fire the exception are:
Option A: throw new ParityException();
Option C: throw new ParityException('parity does not match');
Both use the throw statement to fire the exception.

질문 # 69
A developer needs to have records with specific field values in order to test a new Apex class.
What should the developer do to ensure the data is available to the test?

A. Use Anonymous Apex to create the required data.
B. Use test.loadData() and reference a JSON file in Documents.
C. Use Test.loadData() and reference a CSV file in a static resource.
D. Use SOQL to query the org for the required data.

정답：C

설명：
To ensure that specific data is available in test methods, the developer should create test data within the test context.
Option B: Use Test.loadData() and reference a CSV file in a static resource.
Correct Approach.
Test.loadData() is a method that allows test methods to load test data from a CSV file stored as a static resource.
This method creates the records in the test context, ensuring that the data is available during the test execution.
Using a CSV file makes it easy to define multiple records with specific field values.
Usage Example:
@isTest
private class MyTestClass {
@isTest
static void testMethod() {
List<MyObject__c> testRecords = (List<MyObject__c>) Test.loadData(MyObject__c.sObjectType, 'MyTestData');
// Proceed with testing using testRecords
}
}
Where 'MyTestData' is the name of the static resource containing the CSV file.
Test.loadData() does not support loading data from JSON files or from the Documents object.
It uses CSV files stored as static resources.
Option C: Use Anonymous Apex to create the required data.
Not Effective for Testing.
Data created via Anonymous Apex is not available in test methods due to data isolation.
Test methods operate in their own context and cannot access data created outside the test unless SeeAllData=true is used, which is discouraged.
Option D: Use SOQL to query the org for the required data.
Not Recommended.
Test methods should not rely on existing org data.
Tests should create their own data to ensure consistency and avoid dependencies.
Using SeeAllData=true is discouraged.
Conclusion:
To ensure that records with specific field values are available in the test, the developer should use Test.loadData() with a CSV file stored in a static resource.
Therefore, Option B is the correct answer.
Reference:
Test.loadData() Method
Static Resources
Options Not Suitable:
Option A: Use test.loadData() and reference a JSON file in Documents.
Incorrect.

질문 # 70
......

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