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| Section | Weight | Objectives |
|---|---|---|
| Lightning Web Component Development | 50% | - Advanced LWC Development
|
| Reference Implementations | 15% | - Checkout and payment architecture
|
| Checkout Flow Development | 10% | - Checkout customization
|
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질문 # 59
What are two advantages of using Lightning Data Service?
정답：A,D
설명：
Two advantages of using Lightning Data Service are that it combines and de-duplicates server calls and that it loads record data progressively. Lightning Data Service is a service that provides access to Salesforce data and metadata in Lightning web components. It optimizes performance and minimizes server round trips by caching data on the client side and sharing data across components. It also combines and de-duplicates server calls by batching requests for the same record or object and returning a single response. It also loads record data progressively by returning available cached data first and then fetching updated data from the server asynchronously. Communicating with other components and converting between different data formats are not advantages of using Lightning Data Service, as they are not related to its functionality or features. Salesforce References: Lightning Web Components Developer Guide: Lightning Data Service, Lightning Web Components Developer Guide: Work with Salesforce Data
질문 # 60
What are two purposes of the Shadow DOM in a Lightning web component?
정답：A,B
설명：
According to the Lightning Web Components Developer Guide, Shadow DOM is a standard that encapsulates the internal document object model (DOM) structure of a web component. Encapsulating the DOM gives developers the ability to share a component and protect the component from being manipulated by arbitrary HTML, CSS, and JavaScript. Shadow DOM also provides style and behavior isolation for a web component, which means that the styles and scripts defined inside a component do not affect the rest of the page, and vice versa. Therefore, the purposes of the Shadow DOM in a Lightning web component are to encapsulate the internal DOM structure of a web component (A) and to allow components to be shared while protecting them from being manipulated by arbitrary code (B). The other options are incorrect because Shadow DOM does not allow direct access to the document object model of the component , nor does it allow older JavaScript libraries to manipulate the tagging structure (D). References: Lightning Web Components Developer Guide, Understand the Shadow DOM Unit
질문 # 61
During checkout flow customizations, a developer receives an error on shipping cost calculation integrations with the error code: INSUFFICIENT_ACCESS_OR_READONLY.
What is causing this error?
정답：B
설명：
The error code INSUFFICIENT_ACCESS_OR_READONLY is caused by the cart being no longer in a valid Checkout State during checkout flow customizations. A cart is an object that represents a collection of products and charges that a customer intends to purchase in the storefront. A cart has a Checkout State field that indicates the current state of the checkout process for the cart. The Checkout State can have values such as Draft, InProgress, Completed, or Cancelled. A cart can only be modified or updated when it is in Draft or InProgress state. A cart cannot be modified or updated when it is in Completed or Cancelled state. If an attempt is made to modify or update a cart that is in Completed or Cancelled state, an error with the code INSUFFICIENT_ACCESS_OR_READONLY will be thrown. This error means that the user does not have permission to edit or delete a record because it is read-only or locked. The storefront user does not have access to the Cart Delivery Method object is not a cause of this error code, as it is not related to the cart checkout state or data modification. The Cart Delivery Method object is an object that stores information about the delivery method selected for a cart in the storefront. An error has occurred during the cart shipping charge integration is not a cause of this error code either, as it is not related to the cart checkout state or data modification. The cart shipping charge integration is an integration that calculates and applies shipping charges to a cart based on various factors such as delivery method, location, weight, volume, etc. The storefront user does not have access to custom fields on the Order Delivery Method object is not a cause of this error code either, as it is not related to the cart checkout state or data modification. The Order Delivery Method object is an object that stores information about the delivery method selected for an order summary in the storefront. Salesforce References: B2B Commerce Developer Guide: Cart Object, [B2B Commerce Developer Guide: Cart Delivery Method Object], [B2B Commerce Developer Guide: Order Delivery Method Object], [Salesforce Help: Common Error Messages]
질문 # 62
A developer has created a custom Lightning web component for the Cart page that needs to react to changes to cart items from the standard cart component.
How should the developer implement the custom component so changes to cart items and quantities are reflected?
정답：B
설명：
The developer should implement the custom component so that it subscribes to events on the lightning_commerce_cartChanged channel using the Lightning Message Service. This is the recommended way to communicate between custom and standard components on the Cart page, as it allows the custom component to receive updates from the standard cart component whenever the cart items or quantities change.
The Lightning Message Service is a pub/sub mechanism that enables components to communicate across the DOM, regardless of their namespace, technology, or source. The lightning_commerce_cartChanged channel is a predefined channel that carries information about the cart state, such as the cart ID, the cart items, and the cart total. References: Custom Component APIs, Lightning Message Service, Communicate Across the DOM with Lightning Message Service Learn more
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질문 # 63
A developer is trying to integrate a new shipping provider to use during checkout in a storefront Which two steps must the developer take to make an integration available for selection?
정답：A,D
설명：
Explanation
To make an integration available for selection, a developer must create a RegisteredExternalService record using Workbench and create an Apex class that uses the integration framework. Creating a RegisteredExternalService record using Workbench allows the developer to register their custom integration class as an external service in Salesforce B2B Commerce. The RegisteredExternalService record contains information such as the class name, version, display name, description, and category of the integration class.
The category determines where and how the integration class can be used in B2B Commerce, such as ShippingService or TaxService. Creating an Apex class that uses the integration framework allows the developer to define custom logic for integrating with an external service provider's API or service. The integration framework provides interfaces and classes for various types of integrations, such as shipping, tax, payment, inventory, and freight. The developer can implement these interfaces and classes in their custom Apex class and override their methods with their own logic. Modifying the StoreIntegratedService to map to an Apex class ID using Workbench is not a required step for making an integration available for selection, as it is only used for registering internal services that are provided by Salesforce B2B Commerce out-of-the-box.
Entering the integration class name and version in store administration is not a required step either, as it is only used for selecting an existing integration class that has already been registered as an external service.
Salesforce References: [B2B Commerce Developer Guide: Integration Framework], [B2B Commerce Developer Guide: RegisteredExternalService Object]
질문 # 64
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그 외, Itexamdump B2B-Commerce-Developer 시험 문제집 일부가 지금은 무료입니다: https://drive.google.com/open?id=14wNY9_1Lbq5WoQQdcHwQ9A3P1ykLuxCr