CRT-450 Exam Dumps - Salesforce Developers Questions and Answers

An Apex REST class is a custom class that defines methods that can be invoked via HTTP requests. The developer can use the @RestResource annotation to expose the class as a REST resource, and use the @HttpGet, @HttpPost, @HttpPut, or @HttpDelete annotations to define the methods that correspond to the HTTP verbs. The developer can also use the RestContext class to access the request and response information, such as the parameters, headers, and body. An Apex REST class can be used to integrate with an external order management system by sending and receiving JSON or XML data, and parsing and serializing it using the built-in Apex methods. The developer can then use the flow:callApex action in the flow to invoke the Apex REST class and pass the data to the screen element. An Apex REST class is different from the other options listed, as they are not suitable for this requirement. An Apex controller is a class that provides logic and data for a Visualforce page or a Lightning component, not a flow. An outbound message is a message that is sent from Salesforce to an external system when a workflow rule is triggered, not when a flow is executed. An invocable method is a method that is annotated with @InvocableMethod and can be called from a process, a flow, or a REST API, but it cannot make HTTP requests to an external system. References:

• Apex REST Methods from the Apex Developer Guide
• Call Apex from Flow from the Salesforce Help
• Integrate with External Systems Using Apex REST Services from the Salesforce Trailhead

The correct implementation is option D, where the trigger is set to execute before the insertion of a Request__c record. It calls the validateRecords method from the RequestLogic class to check if certain conditions are met before allowing the creation of a new record. This ensures that validation occurs prior to record insertion, preventing the creation of records that do not meet specified conditions. References: The explanation can be inferred from knowledge on triggers and their execution context as per Salesforce developer documentation and learning materials available on [Trailhead](1(https://trailhead.salesforce.com/content/learn/modules/apex_triggers%29.

The view state limit is the maximum size of the serialized version of the page state that can be transferred between the server and the client. The view state includes the components, field values, and controller state of the page. To reduce the view state size, a developer can use a StandardSetController, which allows the developer to create pagination for a set of records without having to manually manage the query and the results. A StandardSetController can handle up to 10,000 records, and only the records that are displayed on the current page are included in the view state. This way, the developer can avoid querying and storing all the records in a list variable, which would increase the view state size and potentially cause errors. References:

• Visualforce Developer Guide: StandardSetController Methods
• Visualforce Developer Guide: Working with Very Large SOQL Queries
• Trailhead: Visualforce Basics

An Assignment Flow element is a logic element that allows you to set values in variables, collection variables, record variables, record collection variables, and global variables1. You can use an Assignment Flow element to assign the support representative name to the custom field on the Case object based on the case origin. This way, you can automate the case assignment process without writing any code or using any formula. A trigger, a formula field, and a validation rule are not the best solutions for this scenario, as they either require code, are not dynamic, or do not change the field value. References: 1: Flow Element: Assignment - Salesforce