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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced Lightning Web Component Development | 30% | - Custom LWC development
|
| Topic 2: Reference Implementations | 15% | - Checkout and payment architecture patterns
|
| Topic 3: Basic Lightning Web Component Development | 20% | - LWC enhancement
|
| Topic 4: Data Management | 15% | - Commerce data modeling and integration
|
| Topic 5: Checkout Flow Development | 10% | - Checkout customization
|
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NEW QUESTION # 65
A developer needs to loop through a series of child components which are tiles. What is the correct syntax for this if the child component is called appTile?
Answer: D
Explanation:
The correct syntax for looping through a series of child components which are tiles is option A. Option A uses the for:each directive to iterate over a collection of items and render a template block for each item. The for:each directive requires an expression that evaluates to an array or an iterable object and an item alias that represents the current item in the iteration. The item alias can be used to access the item's properties or pass them to child components. In option A, the expression is appTiles, which is an array of objects that represent app tiles, and the item alias is appTile, which represents the current app tile object in the iteration. The appTile object's properties, such as name, description, and icon, are passed to the app-tile child component using attributes. Option B is incorrect because it uses an invalid syntax for the for:each directive. The for:each directive requires a colon (:) after the for keyword, not an equal sign (=). Option C is incorrect because it uses an invalid syntax for the for:each directive. The for:each directive requires an item alias that represents the current item in the iteration, not a key alias that represents the current index in the iteration. Option D is incorrect because it uses an invalid syntax for the template tag. The template tag requires a closing tag (</template>), not a self-closing tag (<template/>). Salesforce Lightning Web Components Developer Guide: Iterate Over a Collection, Lightning Web Components Developer Guide: Template Syntax
NEW QUESTION # 66
What tool can a developer use to investigate errors during development?
Answer: A
Explanation:
Browser dev tools are a set of web authoring and debugging tools built into most modern browsers. They allow developers to inspect, edit, and debug the HTML, CSS, JavaScript, and network activity of a web page. They can also provide useful information about errors, warnings, performance, and accessibility issues. Browser dev tools are especially helpful for developing and testing Lightning web components, as they can display the component hierarchy, attributes, events, and slots.
The other options are not correct because:
A) Commerce Diagnostics Event Logging is a feature that enables developers to capture and analyze events that occur during the execution of B2C Commerce code. It can help identify performance bottlenecks, memory leaks, and unexpected behavior. However, it is not a tool that can be used directly by the developer, but rather a service that requires a support request to enable and access.
B) Checkout Flow Log is a log file that shows the details of the checkout flow execution, such as the input and output parameters, the pipeline steps, and the errors and warnings. It can help troubleshoot issues related to the checkout process, such as payment, shipping, or tax calculation. However, it is not a tool that can be used during development, but rather a log file that can be accessed after the checkout flow has run.
C) Support cases are requests for assistance from the Salesforce support team. They can help resolve technical issues, provide guidance, or escalate bugs. However, they are not a tool that can be used to investigate errors during development, but rather a communication channel that can be used after the developer has exhausted other resources.
Browser Dev Tools
Debug Your Lightning Web Components
Commerce Diagnostics Event Logging
[Checkout Flow Log]
NEW QUESTION # 67
Based on error emails flowing in, a developer suspects that recent edits made to a checkout flow have created a defect. The developer has data points available to use as inputs in reproducing the scenario.
What should the developer do next?
Answer: D
Explanation:
The next step that the developer should do after suspecting that recent edits made to a checkout flow have created a defect and having data points available to use as inputs in reproducing the scenario is to open the flow, select Debug, provide the Input values, and select Run. A flow is a type of application that automates a business process by collecting data and performing actions in Salesforce or an external system. A flow can be used to customize the checkout process in the storefront by defining the steps and logic that are executed when a customer places an order. A flow can be edited or modified using Flow Builder, a point-and-click tool that allows developers to create and manage flows. Flow Builder also provides debugging and testing tools that allow developers to run and troubleshoot flows before deploying them. To debug or test a flow, the developer can open the flow in Flow Builder, select Debug from the toolbar, provide the Input values for the flow variables, and select Run. This will execute the flow in debug mode, which simulates how the flow runs in the org with real data. The developer can use debug mode to verify if the flow works as expected or if there are any errors or issues with the flow logic or actions. Open the flow, select Attach to Live Session, provide the session ID, and select Attach is not a valid next step, as it is not a feature or option available in Flow Builder or Salesforce CLI. Attach to Live Session is a feature that allows developers to attach a debugger to a running Apex session and inspect the state of the code execution. Open the flow, select Debug with Inputs, provide the Input values, and select Run is not a valid next step either, as it is not a feature or option available in Flow Builder or Salesforce CLI. Debug with Inputs is a feature that allows developers to debug an Apex class or trigger with predefined input values and breakpoints. Open the flow, select Debug, provide the session ID for replay, and select Run is not a valid next step either, as it is not a feature or option available in Flow Builder or Salesforce CLI. Replay is a feature that allows developers to replay an Apex log file and inspect the state of the code execution at each line. Salesforce [B2B Commerce Developer Guide: Customize Checkout Flows], [Salesforce Help: Flow Builder], [Salesforce Help: Debug Your Flows], [Salesforce Developer Blog: Apex Replay Debugger]
NEW QUESTION # 68
A developer is building a custom component in Lightning web components (LWC) that has a grandchild component that needs to pass information to the grandparent component. What is the correct way to demonstrate the passing of a message from the grandchild component to the grandparent component?
Answer: D
Explanation:
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 th@apidecorator 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@wiredecorator 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@trackdecorator to track a property on the grandchild component, which is not a valid way to communicate with the grandparent component.Communicate Across the DOM | Lightning Web Components Developer Guide,Child to grandparent communication in LWC,PubSub Library for Lightning Web Components
NEW QUESTION # 69
A Northern Trail Qutfitters (NTO) developer made a tile component. To expose a click event and react to user input using the markup below, what should replace <CLICK_EVENT>?
Answer: C
Explanation:
To expose a click event and react to user input in a Lightning web component, the developer should use a method name as the value of the onclick attribute in the template. The method name should be followed by parentheses, as in tileClick(). This syntax indicates that the method is invoked when the element is clicked. The method should be defined in the JavaScript file of the component, and it can access the event object as a parameter. The other options are either invalid or incorrect. For example, {event:tileClick} is not a valid syntax for an onclick attribute, javascript:avoid(0);tileClick(); is unnecessary and outdated, and {tileClick} is a property binding expression, not a method invocation.B2B Commerce and D2C Commerce Developer Guide,Lightning Web Components Developer Guide
NEW QUESTION # 70
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