AD0-E725 Adobe Commerce Developer Expert Questions and Answers

The n+1 problem occurs when multiple queries are made individually instead of being grouped, leading to inefficient performance.

API Mesh batching solves this by combining multiple GraphQL requests into a single query, reducing round trips and improving response times.

A is incorrect: API Mesh does not “replace” APIs but orchestrates them.

C is partially correct but too general; aggregation alone does not solve the n+1 problem.

B is correct: batching specifically addresses n+1 query performance issues.

If methods are protected or private, plugins cannot be used because they only work with public methods. In this case, the developer should use a class preference to replace the original class with a custom class that extends it.

A (preference) is correct.

B (observer) cannot be used because observers only react to events, not protected/private methods.

C (patch) is not a customization mechanism; data/patches are used for database schema or data updates.

Adobe Commerce provides a built-in Upgrade Compatibility Tool (UCT) that allows developers to check for potential code incompatibilities before performing a version upgrade.

The UCT:

Analyzes the current codebase against the target upgrade version .

Reports on deprecated classes, methods, and APIs that could break during the upgrade.

Produces a compatibility report (HTML/CSV/JSON) that can be shared with customers as part of the upgrade plan.

This tool is specifically designed to help developers assess upgrade risks and is the official Adobe Commerce-recommended method for preparing upgrade assessments.

Option A (SWAT) : The Site-Wide Analysis Tool provides performance, configuration, and health insights , but it does not analyze code compatibility for upgrades.

Option B (minimum system requirements) : This ensures the environment is technically capable of running the new version but does not provide insights into custom code and extension compatibility .

Official Documentation Extracts:

“The Upgrade Compatibility Tool helps you identify potential issues in your custom code when upgrading to a new Adobe Commerce release. It scans your codebase and produces a report highlighting possible code changes that may be required.” — Adobe Commerce DevDocs: Upgrade Compatibility Tool

“Run bin/magento upgrade:compatibility:report to generate the upgrade compatibility report. The report provides details about deprecated and removed code, APIs, and incompatibilities.” — Adobe Commerce CLI Reference

In Adobe Commerce Cloud Pro environments, disk allocation is provisioned at the infrastructure level and cannot be changed directly by developers. Increasing disk size requires assistance from Adobe’s Cloud Ops team via a support ticket.

A (license extension) is unrelated to storage.

B (magento.app.yaml) configures services and resources but cannot increase allocated disk space.

C is correct: Adobe support ticket is required.

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.

Webhooks in Adobe Commerce can be customized using webhooks.xml, where rules can be defined with conditions, including regex-based filtering. This allows the developer to configure postcodes that trigger specific webhook behavior.

A is not correct: modifying core webhook logic via plugin is not the recommended approach.

C is incorrect: duplicating webhooks is unnecessary when rules can be defined declaratively.

B is correct: webhooks.xml with rule conditions provides the proper solution.

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.

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.

To allow loading of external images, the policy that must be updated is img-src in the csp_whitelist.xml.

Option A (default-src) is too broad and not best practice.

Option C (media-src) applies only to audio/video sources, not images.

Thus, B is the correct solution.

To expose a new field via an Extension Attribute:

C → Declare the extension attribute in etc/extension_attributes.xml.

D → Implement an after plugin on the Product Repository to populate the new attribute with custom logic (in this case, lifetime sales).

A is incorrect: etc/webapi_rest/extension_attributes.xml does not exist (only extension_attributes.xml is valid).

B is incorrect: around plugins are discouraged here and unnecessarily complicate service contract extensions.

The correct annotation is @testConfigFixture. It allows developers to set or override configuration values during tests.

A does not exist.

B does not exist.

C is correct: @testConfigFixture provides a way to programmatically adjust admin configurations for the scope of the test.

Out of the box, Adobe Commerce does not support per-attribute ACL permissions. ACL resources can restrict access to API endpoints or modules, but not individual product attributes.

Therefore, to restrict access to a specific attribute like external_service_id, the developer must implement custom permission control logic.

A is incorrect: ACL works at module/controller/service contract level, not per attribute.

C (plugin) could work but is not the correct principle-driven answer, as it is a workaround rather than attribute-level permission management.