Explanation:

In Salesforce B2B Commerce, to reorder a checkout flow step within a sequence, a developer must adjust the 'next-state' attribute in the configuration of the preceding subflow. This approach allows for dynamic control over the sequence of checkout steps without needing to modify the structure of the main checkout flow itself. The Salesforce B2B Commerce documentation outlines how checkout flows are constructed and how subflows can be managed and resequenced through configuration adjustments, providing a flexible and maintainable way to customize the checkout experience.

Explanation:

A customer can create its own robots.txt file for three valid reasons: The customer wants to reference multiple storefront sitemap indexes in a single robots.txt file. This can be useful if the customer has multiple storefronts under the same domain and wants to provide a single entry point for search engines to crawl their sitemaps.

The customer wants to reference a custom sitemap index. This can be useful if the customer has created their own sitemap index that contains custom sitemaps or sitemaps from other sources.

The customer’s store is not located at the root of their domain. This can be useful if the customer has their store under a subdirectory or a subdomain and wants to specify a different robots.txt file for their store than for their main domain.

Salesforce References: B2B Commerce and D2C Commerce Developer Guide, Robots.txt File

Explanation:

In Salesforce, developers can subscribe to platform events using both Flows and Apex Triggers. This allows for the execution of automated processes in response to the events. Apex Triggers can be written to respond to event messages in the same way they respond to DML events. Similarly, Flows can be configured to trigger upon the receipt of a platform event. This functionality is documented in Salesforce's developer guides and best practices, which emphasize the versatility and power of combining declarative and programmatic approaches to respond to platform events.

Explanation:

To authorize the org for Command Line Interface (CLI) access so the developer can deploy Lightning web components, the developer should run the command: 'sfdx force:auth:web:login -r “https://login.salesforce.com” and then supply the credentials in the browser when it opens. The sfdx force:auth:web:login command is a Salesforce CLI command that authorizes an org using the web server flow. The web server flow is an OAuth 2.0 authentication flow that opens a browser window and prompts the user to log in to Salesforce and allow access to the CLI. The -r flag specifies the login URL of the org, which is https://login.salesforce.com for production or developer orgs. Running this command will open a browser window and ask the developer to enter their username and password for the org. After successfully logging in, the developer will be able to use the CLI to perform various tasks with the org, such as deploying or retrieving metadata, running tests, or executing commands.

Running the command: 'sfdx force:login -r “https://login.salesforce.com” is not a valid way to authorize the org for CLI access, as there is no such command as sfdx force:login. Running the command ‘sfdx force:auth:web:login - a “https://login.salesforce.com”’ is not a valid way either, as the -a flag specifies an alias for the org, not a login URL. Running the command ‘sfdx force:auth:web:login -r “https://login.salesforce.com” -username’me@my-new-org.org"’ is not a valid way either, as there is no such flag as -username. Salesforce References: Salesforce CLI Command

Reference: force:auth:web:login, Salesforce Developer Tools for Visual Studio Code

Explanation:

Two technologies that can subscribe to the CommerceDiagnosticEvents event are Aura Components and Lightning web components. CommerceDiagnosticEvents is an event that is fired by Salesforce B2B Commerce when an error occurs in the storefront. CommerceDiagnosticEvents contains information about the error, such as error code, error message, error type, and error details. CommerceDiagnosticEvents can be subscribed by other components or services that want to handle or display the error information in different ways. Aura Components are a type of component that can be used to create custom user interfaces for Salesforce apps. Aura Components can subscribe to CommerceDiagnosticEvents using an aura:handler tag in their markup file. The aura:handler tag specifies an event name, an action attribute that defines a controller function to handle the event, and other optional attributes. Lightning web components are another type of component that can be used to create custom user interfaces for Salesforce apps. Lightning web components can subscribe to CommerceDiagnosticEvents using an @wire decorator in their JavaScript file. The @wire decorator specifies an event name, a function name that defines a handler for the event, and other optional parameters. Processes are not a technology that can subscribe to CommerceDiagnosticEvents, as they are not related to user interface development or event handling. Processes are automated workflows that execute actions based on certain criteria or conditions in Salesforce. Streaming API is not a technology that can subscribe to CommerceDiagnosticEvents either, as it is not related to user interface development or event handling. Streaming API is an API that allows applications to receive notifications of data changes in Salesforce in near real-time.

Salesforce References: [B2B Commerce Developer Guide: Handle Errors], [Aura Components Developer Guide: Handle Component Events], [Lightning Web Components Developer Guide: Communicate with Events], [Salesforce Help: Process Automation], [Salesforce Developer Guide: Streaming API]