Developers CRT-450 Release Date

 Validation rules and record-triggered flows are two declarative options for building out the business logic layer of a Salesforce application. Validation rules allow the developer to define criteria and error messages to prevent invalid data from being saved1. Record-triggered flows allow the developer to automate actions based on changes in records, such as creating, updating, or deleting related records2. Both of these options can be configured and maintained by a Salesforce administrator without writing code. References:

• Validation Rules, Trailhead module
• Record-Triggered Automation, Trailhead module

• SVG resources, content asset files, and static resources are three Salesforce resources that can be accessed from a Lightning web component. They are used to store and display images, icons, fonts, stylesheets, JavaScript libraries, and other files that are required by the component12.
• SVG resources are Scalable Vector Graphics files that can be used to create and display icons and images in a Lightning web component. They can be referenced by using the @salesforce/resourceUrl import in the JavaScript file of the component12.
• Content asset files are files that are uploaded to the Salesforce Content Library and can be used to store and display images and other media in a Lightning web component. They can be referenced by using the @salesforce/contentAssetUrl import in the JavaScript file of the component12.
• Static resources are files or archives that are uploaded to the Static Resources page in Salesforce Setup and can be used to store and access stylesheets, JavaScript libraries, fonts, and other files in a Lightning web component. They can be referenced by using the @salesforce/resourceUrl import in the JavaScript file of the component12.
• Third-party web components and all external libraries are not Salesforce resources that can be accessed from a Lightning web component. They are not supported or recommended by Salesforce for security and performance reasons12.
• Third-party web components are web components that are created by other vendors or developers and are not part of the Lightning web components framework. They may not follow the same standards, specifications, or best practices as Lightning web components and may introduce security risks or compatibility issues12.
• All external libraries are JavaScript libraries that are hosted on external servers or CDNs and are not part of the Salesforce platform. They may not be compatible with the Lightning web components framework or the Locker Service, which enforces strict security policies and restrictions on the code execution and access12.

References:

• 1: Lightning Web Components Developer Guide
• 2: Cert Prep: Platform Developer I: User Interface

 The method must be decorated with @AuraEnabled to make it accessible from a Lightning web component. The @AuraEnabled annotation enables client- and server-side access to an Apex controller method. Without this annotation, the Lightning web component can’t call the Apex method. The cacheable=true attribute is optional and indicates whether the method can be cached by the client. The method can return any data type that can be serialized into JSON, such as a JSON object, a JSON array, a primitive type, or a custom type. The method does not need to return a string of a serialized JSON array, as the framework handles the serialization and deserialization automatically. References:

• Lightning Web Components Developer Guide: Call Apex Methods, pages 1-2
• Apex Developer Guide: Annotation AuraEnabled, page 1
• Trailhead: Platform Developer I Certification Study Guide: Lightning Web Components, unit 5

 The developer should choose to use Data Loader instead of Data Import Wizard because Data Import Wizard cannot import more than 250 records at a time. Data Loader is a client application that can import up to five million records at a time, using either the user interface or the command line. Data Loader can also perform more complex operations, such as upsert, delete, and export. Data Import Wizard is a web-based tool that can import up to 50,000 records per file, but only 250 records per batch. Data Import Wizard can also perform insert, update, and upsert operations, but not delete or export. Data Loader does not run from the developer’s browser, but rather from the developer’s machine. Data Import Wizard does support Opportunities, as well as other standard and custom objects. Data Loader does not automatically relate Opportunities to Accounts, but rather requires the developer to map the fields accordingly. References:

• Salesforce Help: Data Import Wizard vs. Data Loader, page 1
• Salesforce Help: Data Loader Overview, page 1
• Trailhead: Platform Developer I Certification Study Guide: Data Modeling, unit 2