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AD0-E725
Adobe Commerce Developer Expert Questions and Answers

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Questions # 11:

A Developer needs to subscribe to the customer_register_success event.

How should the observer be declared in the module?

Options:

Declare in etc/events.xml:

Declare in etc/observer.xml:

Answer

Explanation

The correct declaration is in etc/events.xml with as the parent node and as the child node.

Magento’s event/observer framework requires the observer definition to follow this structure.

Option B is invalid because the tag cannot be the root node.

Option C is invalid because Magento does not use observer.xml; only events.xml is valid.

[Reference:, , Adobe Commerce DevDocs – Events and observers, ]

Questions # 12:

A client uses a straightforward custom payment method which allows a pre-generated code to be used as payment. The code is provided directly to customers through email and other communications. The client reports a problem with someone fraudulently guessing the codes correctly. They want to implement an API check that ensures the code exists in their system when the code is applied.

Where should the Developer add this change?

Options:

Create a before plugin on the canCapture method and implement the API check there.

Create a custom validator that will check for this code at the time the order is placed.

Create an after plugin on the canAuthorize method and implement the API check there.

Answer

Explanation

The correct approach is to implement a custom payment validator. Validators ensure that the payment method data is validated at the checkout process, before the order is placed.

A (canCapture) is used for payment capture operations, not code validation.

C (canAuthorize) is used for authorization checks, but not the correct place for validating custom input codes.

B is correct because validators run at checkout, ensuring only valid codes are accepted.

[Reference:, , Adobe Commerce DevDocs – Custom payment method validators, ]

Questions # 13:

An Adobe Commerce Developer is tasked with adding additional data to an order entity in REST API.

Remembering upgradability, which solution should the developer implement?

Options:

Use interceptor plugins.

Use extension attributes.

Use API events.

Answer

Explanation

The correct way to expose additional data for service contracts (such as REST or GraphQL APIs) is via Extension Attributes.

A (plugins): Not intended for exposing new data in APIs.

C (events): Cannot modify service contract data structures.

B is correct: Extension Attributes allow adding new fields to API entities while maintaining backward compatibility and upgradability.

[Reference:, , Adobe Commerce DevDocs – Extension attributes, ]

Questions # 14:

An Adobe Commerce Cloud Developer is tasked with investigating slow page loads and intermittent errors reported by a client after a recent deployment to their Pro Production environment.

Which action should the Developer use to quickly access and analyze the necessary data?

Options:

Connect via SSH into each production node to review system and application logs independently for a more accurate representation of issues being logged.

Go to New Relic Log Management to access aggregated log data, allowing the analysis of application, infrastructure, CDN, and WAF errors.

Access Cloud Console to review environment messages and deployment logs that took place during the previous deployment to production.

Answer

Explanation

In Adobe Commerce Cloud Pro Production, logs are spread across multiple nodes, so manually checking each node (A) is inefficient. The correct approach is to use New Relic Log Management, which aggregates logs from all services and nodes. This allows developers to quickly analyze application logs, infrastructure logs, CDN, and WAF errors in one place.

A is inefficient and not recommended.

C only shows deployment logs, not ongoing runtime errors.

B is correct: New Relic Log Management is the single source of truth for performance and error analysis.

[Reference:, , Adobe Commerce Cloud DevDocs – Log management with New Relic, ]

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