Salesforce B2B-Commerce-Developer Exam With Confidence Using Practice Dumps

To create an event listener on a parent component programmatically, the developer should use the following line of code:

this.template.addEventListener(‘notification’, this.handleNotification);

This line of code adds an event listener to the template element of the parent component, which is the root element that contains all the child elements. The event listener listens for an event named ‘notification’, which is a custom event that can be dispatched by any child component. The event listener invokes a method named handleNotification, which is an arrow function defined in the parent component class. The handleNotification method receives the event object as a parameter and can perform any logic based on the event data. The other lines of code are either incorrect or incomplete. Salesforce References: Lightning Web Components Developer Guide: Communicate with Events, Lightning Web Components Developer Guide: Create and Dispatch Events

 The correct way to demonstrate the passing of a message from the grandchild component to the grandparent component in LWC is to use the PubSub library. The PubSub library is a utility that enables Lightning web components to communicate across the DOM tree without using intermediaries. The grandchild component can publish a message to a channel, and the grandparent component can subscribe to that channel and receive the message. This way, the communication is decoupled and does not depend on the component hierarchy. Option B shows the correct syntax for using the PubSub library to pass a message from the grandchild component to the grandparent component. Option A is incorrect because it uses the @api decorator to expose a property on the grandchild component, which is not a valid way to communicate with the grandparent component. Option C is incorrect because it uses the @wire decorator to wire a property on the grandchild component to a function on the grandparent component, which is also not a valid way to communicate with the grandparent component. Option D is incorrect because it uses the @track decorator to track a property on the grandchild component, which is not a valid way to communicate with the grandparent component. References: Communicate Across the DOM |Lightning Web Components Developer Guide, Child to grandparent communication in LWC, PubSub Library for Lightning Web Components

A best practice when passing query parameters from user interface to an apex controller is to query parameters should be properly sanitized by using JSINHTMLENCODE within the VisualForce Page or Component. This function will encode any special characters in the query parameters to prevent cross-site scripting (XSS) attacks or SOQL injection attacks. For example, ccrz.ccRemoteActions.getProducts('{!JSINHTMLENCODE(searchTerm)}') will encode the searchTerm parameter before passing it to the apex controller. Salesforce References: B2B Commerce and D2C Commerce Developer Guide, Security