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CRT-450 Valid Dumps Ebook - 100% Pass 2025 CRT-450: First-grade Salesforce Certified Platform Developer I Practice Test Engine

CRT-450 Valid Dumps Ebook - 100% Pass 2025 CRT-450: First-grade Salesforce Certified Platform Developer I Practice Test Engine

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Salesforce Certified Platform Developer I Sample Questions (Q176-Q181):

NEW QUESTION # 176
Which three code lines are required to create a Lightning component on a Visualforce page? Choose 3 answers

  • A. <apex:slds/>
  • B. $Lightning.use
  • C. $Lightning.createComponent
  • D. <apex:includeLightning/>
  • E. $Lightning.useComponent

Answer: B,C,D

Explanation:
To create a Lightning component on a Visualforce page, you need to use the Lightning Components for Visualforce JavaScript library, which is included by the apex:includeLightning/ tag. This library provides the
$Lightning object, which has two methods: $Lightning.use and $Lightning.createComponent. The
$Lightning.use method references a Lightning dependency app that declares the component dependencies. The
$Lightning.createComponent method creates an instance of the component and renders it on the page. See Use Lightning Components in Visualforce Pages1 for more details. References: 1: Use Lightning Components in Visualforce Pages | Lightning Aura Components Developer Guide | Salesforce Developers(https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/components_visualforce.h


NEW QUESTION # 177
A developer has a single custom controller class that works with a Visualforce Wizard to support creating and editing multiple subjects. The wizard accepts data from user inputs across multiple Visualforce pages and from a parameter on the initial URL.
Which three statements are useful inside the unit test to effectively test the custom controller?
Choose 3 answers

  • A. Test.setCurrentPage(pageRef);
  • B. ApexPages.CurrentPage().getParameters().put('input', 'TestValue');
  • C. insert pageRef.
  • D. String nextPage - controller.save().getUrl();
  • E. public ExtendedController(ApexPages StandardController cntrl) { }

Answer: A,B,D

Explanation:
To effectively test a custom controller that works with a Visualforce wizard, the unit test should do the following:
* Set the current page to the first page of the wizard using Test.setCurrentPage(pageRef), where pageRef is a PageReference object that points to the page URL. This allows the test to access the page parameters and controller methods for that page1.
* Set the page parameter that the wizard expects using
ApexPages.CurrentPage().getParameters().put('input', 'TestValue'), where 'input' is the name of the parameter and 'TestValue' is the value to be passed. This allows the test to simulate the user input or the initial URL parameter that the wizard uses1.
* Verify the navigation logic of the wizard by checking the URL of the next page after invoking the controller action using String nextPage = controller.save().getUrl(), where controller is an instance of the custom controller class and save() is the action method that returns a PageReference object. This allows the test to assert that the wizard redirects to the correct page based on the input and logic2.
The other options are not useful for testing the custom controller. Option A is incorrect because insert pageRef is not a valid Apex statement. Option C is incorrect because public ExtendedController(ApexPages StandardController cntrl) { } is a constructor for a controller extension, not a custom controller3. References:
* Testing Custom Controllers and Controller Extensions | Visualforce Developer Guide | Salesforce Developers
* Testing Navigation Logic | Visualforce Developer Guide | Salesforce Developers
* Build a Controller Extension | Visualforce Developer Guide | Salesforce Developers


NEW QUESTION # 178
As part of new feature development, a developer is asked to build a responsive application capable of responding to touch events, that will be executed on stateful clients.
Which two technologies are built on a framework that fully supports the business requirement? Choose 2 answers

  • A. Aura Components
  • B. Visualforce Components
  • C. Visualforce Pages
  • D. Lightning Web Components

Answer: A,D


NEW QUESTION # 179
A developer is debugging the following code to determinate why Accounts are not being created Account a = new Account(Name = 'A'); Database.insert(a, false); How should the code be altered to help debug the issue?

  • A. Add a System.debug() statement before the insert method
  • B. Add a try/catch around the insert method
  • C. Set the second insert method parameter to TRUE
  • D. Collect the insert method return value a Saveresult variable

Answer: D

Explanation:
The code should be altered to collect the insert method return value as a SaveResult variable, which can provide information about the success or failure of the insert operation, as well as any errors that occurred. The SaveResult variable can be used to print the error messages or debug logs, or to perform conditional logic based on the outcome of the insert operation. For example, the code can be modified as follows:
Account a = new Account(Name = 'A'); SaveResult sr = Database.insert(a, false); if (sr.isSuccess()) { System.debug('Account inserted successfully'); } else { System.debug('Account insertion failed: ' + sr.getErrors()[0].getMessage()); } The second parameter of the Database.insert method is the allOrNone option, which specifies whether to roll back the entire transaction or not if any record fails to insert. Setting it to true or false does not affect the debugging of the issue, but only the behavior of the transaction. Adding a System.debug() statement before the insert method does not help to debug the issue, because it does not provide any information about the insert operation itself. Adding a try/catch around the insert method can help to handle any exceptions that may occur during the insert operation, but it does not provide the same level of detail as the SaveResult variable.
References: SaveResult Class, Database.insert method, Prepare for Your Salesforce Platform Developer I Credential


NEW QUESTION # 180
What is the requirement for a class to be used as a custom Visualforce controller?

  • A. Any top-level Apex class that has a default, no-argument constructor
  • B. Any top-level Apex class that extends a PageReference
  • C. Any top-level Apex class that implements the controller interface
  • D. Any top-level Apex class that has a constructor that returns a PageReference

Answer: C


NEW QUESTION # 181
......

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