Salesforce Updated CRT-450 Exam Questions and Answers by sage

To implement the Apex method that is executed when a recommendation is rejected, the developer should keep in mind the following factors:

• The method must use the @Future annotation because it performs a callout to an external system, which is not allowed in synchronous Apex. The @Future annotation marks a method as asynchronous, meaning that it runs in a separate thread and does not block the main execution1.
• The method must use the @invocableMethod annotation because it is invoked from a flow that is triggered by the Einstein Next Best Action component. The @invocableMethod annotation enables an Apex method to be called from a flow, process, or REST API2.
• The method must be defined as static because it is annotated with @Future and @invocableMethod. Both annotations require the method to be static, meaning that it belongs to the class and not to any instance of the class3.

References:

• 1: Asynchronous Apex
• 2: Invocable Apex
• 3: Static and Instance Methods, Variables, and Initialization Code

Marking the field as Required on the field definition ensures that the field cannot be left blank or null when a record is created or updated, regardless of the page layout or the API. This is the most efficient way to enforce a value for the picklist field, as it does not require any additional configuration or code. Setting the first value as the default value does not prevent the user from changing or clearing the value. Setting a validation rule requires writing a formula and handling error messages. Marking the field as Required on the page layout only affects the user interface, not the API or other tools. References:

• Create a Custom Picklist Field from the Salesforce Help
• Get Started with Picklists from the Salesforce Trailhead
• Picklist Considerations from the Salesforce Help

This code is vulnerable to a cross-site scripting (XSS) attack, because it takes user-supplied input and outputs it directly back to the user without escaping the XSS-vulnerable characters, such as <, >, ", ', and &. By setting the escape attribute to false, the developer disables the anti-XSS filter that is enabled by default for most Visualforce tags. An attacker can exploit this vulnerability by injecting malicious HTML or JavaScript code into the userInput parameter, which can then execute on the user’s browser and compromise their security or privacy. References:

• Cross Site Scripting (XSS)
• Security Tips for Apex and Visualforce Development
• Security Guidelines for Apex and Visualforce Development

 The @InvocableMethod annotation is used to identify a method in an Apex class that can be called from a flow, a bot, or an NBA strategy. It is a helpful annotation to provide a seamless admin-friendly way to call the Apex code using simple flows. Invoking Apex from flow is a significant option for providing design patterns that can solve many business problems while also providing great user experience. The other annotations are not suitable for this scenario, as they have different purposes and limitations. For example, the @future annotation is used to execute a method asynchronously, the @RemoteAction annotation is used to expose a method to a Visualforce page, and the @AuraEnabled annotation is used to enable a method to be called from a Lightning web component or an Aura component. References: Annotations, How to Invoke Apex from Flows Using InvocableMethod Annotation, Salesforce Flow