AD0-E724 Ausbildungsressourcen, AD0-E724 Exam

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Adobe Commerce Developer Professional AD0-E724 Prüfungsfragen mit Lösungen (Q48-Q53):

48. Frage
Which is a correct CMS content element in Adobe Commerce?

A. Widget
B. Image
C. Sheet

Antwort: A

Begründung:
A widget is a CMS content element that can be used to display dynamic content on a page. Widgets can be used to display things like product reviews, social media feeds, or even custom content.
In Adobe Commerce, widgets are a correct CMS content element. Widgets allow merchants to add dynamic data or content blocks to CMS pages, static blocks, and various other locations throughout the store's layout without needing to directly edit the site's code. Options B (Sheet) and C (Image) are not recognized CMS content elements in the context of Adobe Commerce's terminology, making option A the correct answer.

49. Frage
Which command can be used to display a full list of enabled and disabled Magento modules?

A. bin/magento module:show
B. bin/magento modulestatus
C. bin/magento module:all

Antwort: B

Begründung:
The command to display a full list of enabled and disabled Magento modules isbin/magento module:status.
This command provides a comprehensive overview of all modules within the Magento instance, categorizing them into enabled and disabled modules. This information is crucial for debugging and development purposes, as it allows developers to quickly understand which components of Magento are active and which are not, facilitating troubleshooting and configuration adjustments.

50. Frage
An Adobe Commerce developer has created a module that adds a product attribute to all product types via a Data Patch-According to best practices, how would the developer ensure this product attribute is removed in the event that the module is uninstalled at a later date?

A. Add an Uninstall.php file extending l1agentoFrameworkSetupUninstallInterface tO the module's Setup directory and implement the uninstall method.
B. Add instructions to the module's README.md file instructing merchants and developers that they must manually remove this attribute if they want to uninstall the module.
C. Make the Data Patch implement MagentoFrameworksetupPatchPatchRevertabieinterface and implement the revert method to remove the product attribute.

Antwort: C

Begründung:
According to the Develop data and schema patches guide for Magento 2 developers, data patches can also implement PatchRevertabieinterface to provide rollback functionality for their changes. The revert() method contains the instructions to undo the data modifications made by the patch. To ensure that the product attribute is removed when the module is uninstalled, the developer should make the data patch implement PatchRevertabieinterface and implement the revert method to remove the product attribute using EavSetupFactory or AttributeRepositoryInterface. Verified References:https://devdocs.magento.com/guides
/v2.3/extension-dev-guide/declarative-schema/data-patches.html
According to Adobe Commerce (Magento) best practices, when creating modules that add database schema changes or data through Data Patches, it's crucial to consider the reversibility of these changes for module uninstallation. Here's how each option relates to this practice:
* Option A: Adding an Uninstall.php file that extends MagentoFrameworkSetupUninstallInterface is indeed a method to handle module uninstallation in Magento. This interface requires the implementation of an uninstall method where you could write the logic to remove the product attribute.
However, this approach is more commonly used for broader setup/teardown operations beyond simple data patches. The official Magento documentation discusses this approach under module uninstallation:
* Magento DevDocs - Uninstalling a Module
But for data patches specifically, the recommended approach is different.
* Option B: Adding instructions in the README.md file for manual removal by merchants or developers is not a best practice for module management in Magento. This approach relies on human action which can be error-prone and inconsistent, especially in a production environment. Magento encourages automated processes for module lifecycle management to ensure reliability and consistency.
* Option C: This is the correct and recommended approach according to Magento best practices for data patches. By implementing MagentoFrameworkSetupPatchPatchRevertableInterface in your Data Patch class, you ensure that the patch can be reverted. This interface requires you to implement a revert method, which should contain the logic to remove the changes made by the patch, in this case, the product attribute. Here's how it works:
* When creating a Data Patch, you extend MagentoFrameworkSetupPatchDataPatchInterface.
To make it reversible, you also implement
MagentoFrameworkSetupPatchPatchRevertableInterface.
* In the revert method, you would write the code to remove the product attribute that was added by the patch.
This approach ensures that your module's changes can be automatically undone if the module is uninstalled, maintaining the integrity of the Magento installation. Here's a reference from Magento documentation:
* Magento DevDocs - Data Patches
Example implementation:
php
use MagentoFrameworkSetupPatchDataPatchInterface;
use MagentoFrameworkSetupPatchPatchRevertableInterface;
use MagentoEavSetupEavSetup;
use MagentoEavSetupEavSetupFactory;
use MagentoFrameworkSetupModuleDataSetupInterface;
class AddProductAttribute implements DataPatchInterface, PatchRevertableInterface
{
private $eavSetupFactory;
private $moduleDataSetup;
public function __construct(
EavSetupFactory $eavSetupFactory,
ModuleDataSetupInterface $moduleDataSetup
) {
$this->eavSetupFactory = $eavSetupFactory;
$this->moduleDataSetup = $moduleDataSetup;
}
public function apply()
{
/** @var EavSetup $eavSetup */
$eavSetup = $this->eavSetupFactory->create(['setup' => $this->moduleDataSetup]);
$eavSetup->addAttribute(
MagentoCatalogModelProduct::ENTITY,
'custom_attribute',
[
'type' => 'varchar',
'label' => 'Custom Attribute',
'input' => 'text',
'required' => false,
'sort_order' => 100,
'global' => MagentoEavModelEntityAttributeScopedAttributeInterface::SCOPE_GLOBAL,
'group' => 'General',
]
);
}
public function revert()
{
/** @var EavSetup $eavSetup */
$eavSetup = $this->eavSetupFactory->create(['setup' => $this->moduleDataSetup]);
$eavSetup->removeAttribute(MagentoCatalogModelProduct::ENTITY, 'custom_attribute');
}
public static function getDependencies()
{
return [];
}
public function getAliases()
{
return [];
}
}
This ensures that if the module is uninstalled, the product attribute will be automatically removed, adhering to Magento's modular and reversible development practices.

51. Frage
What is one purpose of a customer data JS library?

A. It stores private customer data in local storage
B. It stores the customers credit card info for usage in the checkout.
C. It stores the customer's username and password for easier frontend login.

Antwort: A

Begründung:
The customer data JS library is used to store private customer data in local storage. This data can be used to improve the customer's experience on the store, such as by remembering their shipping address or their preferred payment method.
The customer data JS library in Adobe Commerce is used for managing customer data on the client side, such as the shopping cart, comparison list, and wishlist. It does not store sensitive information like credit card details or usernames and passwords. Instead, it utilizes local storage to keep a private data section where customer-specific data is stored securely and accessed via JavaScript, making option B correct.

52. Frage
An Adobe Commerce developer is creating a new console command to perform a complex task with a lot of potential terminal output. If an error occurs, they want to provide a message that has higher visibility than some of the other content that may be appearing, so they want to ensure it is highlighted in red (as seen in the screenshot):

How can they customize the appearance of this message?

A. Throw a new commandException with the desired message passed as an argument.
B. Call the setDecorationType(Stype) method On the SymfonyConsoleOutputOutputInterface Object before Calling writeln().
C. Wrap the output content in tags like <error>, <info>, or <comment>.

Antwort: C

Begründung:
In Adobe Commerce, when developing custom console commands, you can customize output messages by using special tags provided by Symfony Console, which Adobe Commerce relies on. These tags are designed to help differentiate types of messages and can be used to add color or emphasis to the output, enhancing visibility.
For critical error messages, wrapping the message in the <error> tag will display it in red, as shown in your screenshot. The available tags include:
* <error> for red-colored error messages.
* <info> for informational messages (often displayed in blue).
* <comment> for comments or warnings (usually yellow).
$output->writeln('<error>A critical error has occurred.</error>');
This method is effective and widely used for output customization in Symfony-based console commands.
Additional Resources:
* Adobe Commerce Developer Guide: Console Command Customization
* Symfony Console Output Formatting

53. Frage
......

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Adobe Commerce Developer Professional AD0-E724 Prüfungsfragen mit Lösungen (Q48-Q53):

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