AD0-E725 Adobe Commerce Developer Expert Questions and Answers

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.

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

The recommended best practice is to use the PatchRevertableInterface when creating data patches. This interface defines a revert() method, which is executed during module uninstall, ensuring that added entities (such as product attributes) are properly removed.

B (deleting from database directly) is strongly discouraged and violates upgrade safety.

C (creating a CLI command) is unnecessary; uninstallation should be handled within the patch itself.

To securely access services (such as MySQL, Redis, Elasticsearch) running in Adobe Commerce Cloud, developers must use the tunnel feature. The correct command is:

magento-cloud tunnel:open

This opens a secure tunnel from the local machine to the remote cloud environment services.

A is incorrect; there is no cloud:tunnel:connect Magento command.

B is incorrect; service:connect is not a valid Cloud CLI command.

C is correct.

The best practice is to use the ADMIN_RESOURCE constant in the controller. This constant defines the ACL resource that controls access to the controller. Magento automatically checks the ACL resource against the current admin user’s permissions.

A is unnecessary because ACL checking is built-in and tied to ADMIN_RESOURCE.

C is a legacy method (_isAllowed) used in Magento 1; in Magento 2, the constant override is the proper way.

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.

Adobe Commerce API Mesh provides a centralized GraphQL layer that aggregates data from multiple APIs (Commerce, third-party systems, microservices). This allows the client to interact with a single unified API endpoint, instead of managing multiple APIs individually.

A Bulk API Handler does not exist.

B Adobe I/O Events is for real-time event streaming, not API centralization.

C is correct: API Mesh is the official solution for centralized API management.

To consume messages from a third-party system in RabbitMQ:

queue_topology.xml → defines queues and exchanges (topology).

queue_consumer.xml → defines consumers that listen to the queues.

A/D: communication.xml is used for defining topics for Adobe Commerce modules, not needed when consuming third-party messages directly.

C: queue_publisher.xml is used for publishing messages, not consuming them.

Adobe Commerce provides a configuration flag disabled="true" for cron job definitions in crontab.xml. When set, it prevents the job from being executed, while still keeping the job definition in place. This allows developers to temporarily disable cron jobs without deleting or altering their schedules — a best practice in scenarios where the jobs will later be re-enabled.

Option A (schedule="* * * * *") would instead run the cron job every minute, which is the opposite of disabling it.

Option B (setting an impossible date) is a hack and not recommended, as it introduces fragile configuration that can confuse future maintainers.

Option C is the official and proper way to disable a cron job in Adobe Commerce.

Official Documentation Extracts:

“To disable a job, add the attribute disabled="true" to the <</i>job> node in crontab.xml.”— Adobe Commerce DevDocs: Configure cron jobs

“You can disable a cron job without removing its definition by setting disabled="true". This is useful for temporary maintenance or debugging.”— Adobe Commerce PHP Developer Guide: Cron configuration