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NEW QUESTION # 10
A client receives an alert stating that storage on their production environment is nearly full. They are using Pro architecture and are concerned about storage capacity. A Developer is asked to increase the disk size.
How should this problem be solved?
- A. Modify the magento.app.yaml file.
- B. Open a ticket with Adobe support.
- C. Extend their Adobe license.
Answer: B
NEW QUESTION # 11
A Developer is tasked with creating a new index. The custom indexer is not automatically updating the product data.
How should the Developer solve this issue?
- A. Implement custom database triggers.
- B. Use the mview to allow tracking database changes.
- C. Use an event observer to monitor data changes.
Answer: B
Explanation:
Magento uses the materialized view (mview) system to track database changes and trigger automatic updates to indexers.
B (mview) is correct because it enables Magento to automatically detect data changes and update indexers incrementally.
A (observer) is not reliable for large indexing operations and not the recommended method.
C (database triggers) are discouraged and not used in Magento's indexing mechanism.
Reference:
Adobe Commerce DevDocs - Mview and indexing
NEW QUESTION # 12
A Developer is notified that custom API results are not cached, which is causing additional delays.
What are two potential causes for this behavior? (Choose two.)
- A. The request is using HTTP GET.
- B. The request is using HTTP HEAD.
- C. The request is using HTTP POST.
- D. The request is using HTTP PUT.
Answer: C,D
NEW QUESTION # 13
A Developer discovers that inline scripts are no longer working. This issue occurred after upgrading to the latest version of Adobe Commerce. When checking the console, the errors indicate that the scripts are not allowed to execute.
The following is an example script:
<div id="action-div" onclick="someComponent('title')">Action</div>
How should the Developer adapt the script to run properly according to security practices?
- A. <?php echo $block->renderAllowedElement('<div id="action-div" onclick="someComponent(\'title\')"
>Action</div>'); ?> - B. <?php echo $secureRenderer->renderEventListenerAsTag('onclick', 'someComponent(\'title\')', '#action- div'); ?>
- C. <?php echo $escaper->renderSecureTag('<div id="action-div" onclick="someComponent(\'title\')"
>Action</div>'); ?>
Answer: B
Explanation:
Since Magento 2.3.5, inline JavaScript is restricted by default due to stricter Content Security Policy (CSP) enforcement. Developers must use the SecureHtmlRenderer class to safely render inline event listeners.
Option C correctly uses $secureRenderer->renderEventListenerAsTag() to safely attach the onclick event listener to #action-div.
Options A and B are invalid or unsupported for this purpose.
Reference:
Adobe Commerce DevDocs - Secure HTML rendering
NEW QUESTION # 14
An Adobe Commerce Developer is tasked with configuring a custom module to allow for different behaviors of a core class without altering the original class code.
How should the Developer achieve this flexibility by leveraging Magento's dependency injection system?
- A. Use virtual types in the di.xml file.
- B. Use constructor arguments in the di.xml file.
- C. Use a transient object in the di.xml file.
Answer: A
Explanation:
Comprehensive and Detailed Explanation (with official references):
The correct method is A. Use virtual types in the di.xml file.
Virtual types in Magento's Dependency Injection (DI) system allow developers to reuse existing classes while supplying different constructor arguments. They are not physical PHP classes but are defined in di.
xml. This approach avoids modifying the core code and ensures flexibility when you want the same class to behave differently in different contexts.
* Option B (transient object): Not a valid DI configuration in Magento.
* Option C (constructor arguments): While constructor arguments are part of DI, they don't allow you to create alternate reusable versions of the same class. Virtual types extend this concept properly.
Official Documentation Extracts:
* "Virtual types let you configure an existing class with different constructor arguments. They are not actual PHP classes but are declared in the dependency injection configuration."- Adobe Commerce DevDocs: Virtual types
* "Use virtual types to avoid code duplication and to configure class behavior without extending or overriding Magento core classes."- Adobe Commerce PHP Developer Guide: Dependency Injection
NEW QUESTION # 15
A Developer discovers the following code snippet in default.xml layout:
<referenceBlock name="content">
<block name="custom" template="example.phtml" cacheable="false" />
</referenceBlock>
Which caching behavior will occur?
- A. All pages will be marked as non-cacheable.
- B. Only the custom block will not be cached.
- C. The content block and all its child blocks will become cacheable.
Answer: A
Explanation:
In Magento, if any block within the page layout is marked cacheable="false", the entire page becomes non- cacheable. This means that full-page caching (FPC) will be disabled for all pages containing that block.
Option A is incorrect: cacheability is applied at the page level, not per block.
Option C is misleading; cacheable blocks remain cacheable only if no non-cacheable blocks are present.
Reference:
Adobe Commerce DevDocs - Full-page caching
NEW QUESTION # 16
A recent client-reported bug is fixed by the Adobe Commerce community. The Adobe engineering team has not yet released the patch or committed the bug fix to GitHub. A Developer acquires the custom patch and releases it to their Adobe Commerce environments.
What are the recommended steps the Developer should follow to implement the custom patch for the bug fix?
- A. Install only official patches supplied by them to maintain upgradability.
- B. Update the quality-patches module and list the required patch in the magento-ce-patch.yaml file.
- C. Install the cweagans/composer-patches module and edit the composer.json file to apply the custom patch.
Answer: C
NEW QUESTION # 17
While implementing additional functionality, a Developer needs to modify a class with protected and private methods requiring custom logic. The Developer finds that no other Magento customization, such as plugins, will work.
What should the Developer do in this scenario?
- A. Use a patch to implement the necessary customizations.
- B. Use a preference and extend the original class.
- C. Use an observer to customize data processed by the class.
Answer: B
NEW QUESTION # 18
A customer asks for a new functionality which will allow them to see the total lifetime sales statistic of a product. This new data is to be made available for the API and traditional product exports. The technical architect of the company servicing the client decides that for this to be achieved, the first step is for an Extension Attribute to be created.
What are the next two steps that need to be taken? (Choose two.)
- A. Declare the extension attribute in etc/extension_attributes.xml.
- B. Implement an after plugin on the Product Repository.
- C. Implement an around plugin on the Product Repository.
- D. Declare the extension attribute in etc/webapi_rest/extension_attributes.xml.
Answer: A,D
NEW QUESTION # 19
An Adobe Commerce Developer is implementing asynchronous communication with a third-party system using RabbitMQ. The XML files used must be able to configure a local queue and consume messages published by the third-party system.
Which files should the Developer use?
- A. queue_topology.xml and queue_publisher.xml
- B. queue_topology.xml and queue_consumer.xml
- C. communication.xml, queue_topology.xml, and queue_consumer.xml
- D. communication.xml, queue_topology.xml, and queue_publisher.xml
Answer: B
NEW QUESTION # 20
A client expresses disappointment with the underreported engagement and revenue metrics reported by Product Recommendations.
Which limitation or consideration of this service should be communicated to the client?
- A. Product Recommendations does not support insightful engagement and revenue metrics; an additional service contract is required for this feature.
- B. Ad blockers and privacy settings can prevent Product Recommendations from capturing shopper behavior.
- C. Product Recommendations requires the purchase of an additional license to enable real-time reporting.
Answer: B
Explanation:
Product Recommendations relies on capturing shopper behavior (page views, clicks, add-to-cart events) via JavaScript trackers. If users have ad blockers or restrictive privacy settings enabled, this data may not be captured, leading to underreported metrics.
A is false: Product Recommendations does not require extra licenses for reporting.
C is false: The service already supports engagement and revenue metrics; no additional contract required.
Reference:
Adobe Commerce Product Recommendations - Data collection
NEW QUESTION # 21
A client wants to calculate tax differently when an order is billed for a range of particular postcodes. They want to implement their own system instead of using a third-party system. The Developer is asked to assist in this task by creating a conditional webhook.
What must be done to achieve this?
- A. Create an after plugin on the webhook class and check for a list of postcodes at the time of processing and returning true for certain postcodes.
- B. Create a webhooks.xml file and add the rules wanted in the form of a rule node element using the regex operator to catch a range of postcodes.
- C. Implement a new webhook with a list postcodes and link it to the original webhook, then advise the client to monitor for the new webhook instead.
Answer: B
NEW QUESTION # 22
An Adobe Commerce Developer creates a before plugin for the save() method from the Magento\Framework\App\Cache\Proxy class to manipulate cache identifiers and data before it is saved to the cache storage.
An example of the class code is shown below:
namespace Magento\Framework\App\Cache;
use Magento\Framework\App\Cache\CacheInterface;
use Magento\Framework\ObjectManager\NoninterceptableInterface;
class Proxy implements
CacheInterface,
NoninterceptableInterface
{
...
public function save($data, $identifier, $tags = [], $lifeTime = null)
{
return $this->getCache()->save($data, $identifier, $tags, $lifeTime);
}
...
}
Why is the plugin not working as expected?
- A. The plugin cannot be created for this class.
- B. An after plugin defined for the same function affects the results.
- C. An around plugin defined for the same function prevents the execution.
Answer: A
Explanation:
Comprehensive and Detailed Explanation (with official references):
The correct answer is A. The plugin cannot be created for this class.
The reason is that Magento\Framework\App\Cache\Proxy implements the NoninterceptableInterface.
* Any class that implements the NoninterceptableInterface in Magento is excluded from the plugin system.
* This means no before, after, or around plugins can be applied to methods of such classes.
* Magento uses this mechanism to protect critical classes (like Proxy classes, Factories, and other infrastructure code) from being intercepted, as doing so could introduce performance or stability issues.
Therefore, the developer's plugin for the save() method does not work, because plugins are not allowed on this class by design.
Options B and C are incorrect because:
* Another plugin (after/around) does not block the execution in this case; the class itself is simply non- interceptable.
Official Documentation Extracts:
* "Plugins cannot be applied to final classes, final methods, non-public methods, or classes that implement Magento\Framework\ObjectManager\NoninterceptableInterface."- Adobe Commerce DevDocs: Plugins limitations
* "Classes implementing NoninterceptableInterface cannot be intercepted. This interface is used to mark classes that must not be extended through the plugin mechanism."- Magento Framework Reference:
NoninterceptableInterface
NEW QUESTION # 23
A Developer using API Mesh is assigned to optimize the integration of several third-party APIs with Adobe Commerce. Part of this task is to address performance issues such as the n+1 problem.
In this scenario, which option should the Developer implement?
- A. Use API Mesh batching to combine multiple API requests into a single query.
- B. Use API Mesh to replace the existing APIs with direct GraphQL queries.
- C. Use API Mesh as a middleware for aggregating data from APIs back into Adobe Commerce.
Answer: A
NEW QUESTION # 24
An Adobe Commerce Developer is tasked with adding a custom tax calculation to the checkout process. In addition to core tax calculations, a legacy code extending core tax calculation classes is also found. The Developer wants to utilize Magento's dependency injection system effectively to meet requirements, ensuring the solution works without modifying the existing core and legacy classes.
What should the Developer implement to achieve this?
- A. Preferences
- B. Constructor arguments
- C. Virtual types
Answer: C
NEW QUESTION # 25
A new critical security vulnerability is found on Adobe Commerce Cloud. The successful exploitation may lead to arbitrary code execution, so the Developer must apply a security patch file given by Adobe as soon as possible to ensure system security.
How should the Developer apply the security patch on Adobe Commerce hosted on cloud infrastructure according to best practices?
- A. Apply a security patch using composer.json
- B. Upgrade Adobe Commerce to the latest security patch release
- C. Copy a security patch to m2-hotfixes directory
Answer: C
NEW QUESTION # 26
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