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100+ Free Adobe Commerce Developer Expert Practice Questions

Pass your Adobe Certified Expert - Adobe Commerce Developer (Exam AD0-E725) exam on the first try — instant access, no signup required.

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What best describes out-of-process extensibility in Adobe Commerce?

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Key Facts: Adobe Commerce Developer Expert Exam

$225

Exam Fee (USD; USD 150 in India)

Adobe

33/50

Passing Score

Adobe

100 min

Exam Duration

Adobe

50

Question Count

Adobe

38%

Architecture (largest section)

Adobe AD0-E725 blueprint

2 years

Credential Validity

Adobe (renewable)

Adobe lists Exam AD0-E725 (Adobe Certified Expert - Adobe Commerce Developer) as an expert-level, online-proctored exam with a $225 USD fee (USD 150 in India), 50 questions, 100 minutes, and a passing score of 33 of 50 correct. The credential is valid for two years. The four sections are Architecture (38%), Customizations (32%), Cloud (16%), and External Integrations (14%), covering dependency injection, plugins and observers, service contracts, EAV, MSI, B2B, GraphQL, Adobe Commerce cloud, and out-of-process extensibility with App Builder.

Sample Adobe Commerce Developer Expert Practice Questions

Try these sample questions to test your Adobe Commerce Developer Expert exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In Adobe Commerce, how does the ObjectManager determine which concrete class to inject when a constructor type-hints an interface such as Magento\Framework\UrlInterface?
A.It reads the <preference> node configured in the applicable area's di.xml to map the interface to a concrete type
B.It scans all modules for any class implementing the interface and injects the first match
C.It requires the developer to call ObjectManager::create() with the explicit class name inside the constructor
D.It uses the @api annotation on the implementing class to register it as the default
Explanation: Dependency injection in Adobe Commerce maps abstractions to implementations through <preference> nodes in di.xml. When a constructor type-hints an interface, the ObjectManager resolves it to the concrete class declared as a preference for the requested area, supporting loose coupling per the dependency inversion principle.
2A developer needs to modify the return value of a public method on a core service class without rewriting the class. Which plugin type should be used?
A.A before plugin
B.An after plugin
C.An around plugin that always calls $proceed first
D.An observer subscribed to a dispatched event
Explanation: An after plugin receives the original method's result as its second argument ($result) and returns a possibly modified value, making it the correct and most performant choice for altering a return value. Magento recommends before/after over around plugins because around plugins add overhead and break the chain if $proceed is not called.
3Which statement about plugins (interceptors) in Adobe Commerce is correct?
A.Plugins can intercept private and protected methods if declared with the correct sortOrder
B.Plugins are applied to static methods through the di.xml type node
C.Plugins can only intercept public methods, and cannot be applied to final methods or final classes
D.Plugins replace the original method entirely, similar to a class preference
Explanation: Interceptors are generated by extending the target class, so plugins can only observe public, non-final methods of non-final classes. Final classes, final methods, static methods, and non-public methods cannot be plugged. The sortOrder attribute controls the execution order when multiple plugins target the same method.
4When two plugins from different modules target the same method, what determines which plugin's before method runs first?
A.The alphabetical order of the module names
B.The size of the plugin class file
C.The order in which the modules were installed via Composer
D.The module load order defined by sequence in module.xml, then the plugin sortOrder attribute
Explanation: Plugin execution order is governed first by module load order (declared via the <sequence> dependencies in module.xml) and then by the sortOrder attribute on each plugin node in di.xml. Lower sortOrder values run their before methods earlier and their after methods later in the chain.
5A developer wants to react to a customer being saved without changing any method signatures or return values, and an appropriate event is already dispatched. What is the recommended approach?
A.Subscribe an observer to the dispatched event in events.xml
B.Create an around plugin on the customer repository save method
C.Add a preference overriding the customer model
D.Override the save method using a db_schema.xml trigger
Explanation: When a relevant event is dispatched, an observer registered in events.xml is the recommended, lowest-coupling way to react to it, because observers do not alter method behavior or signatures. Plugins are preferred only when you must change inputs, outputs, or behavior of a specific method.
6Which file is the correct place to declare an event observer that should fire only in the storefront (frontend) area?
A.etc/di.xml
B.etc/frontend/events.xml
C.etc/events.xml
D.etc/adminhtml/observers.xml
Explanation: Area-specific observers are declared in an events.xml file inside the corresponding area folder. Placing events.xml in etc/frontend/ scopes the observer to the storefront area only, while etc/events.xml (global) would apply it everywhere.
7What is the primary purpose of a service contract in Adobe Commerce?
A.To define the database table indexes for an entity
B.To compile dependency injection definitions during deployment
C.To provide a durable, well-defined API of data and service interfaces that guarantees backward compatibility across versions
D.To register cron jobs for an entity's background processing
Explanation: Service contracts are PHP interfaces (data interfaces in Api/Data and service interfaces in Api) that establish a durable, versioned API for a module. Marked with @api, they let third-party code depend on stable contracts and let merchants upgrade safely without breaking customizations.
8Where should the data interfaces (getters and setters defining an entity's structure) of a service contract reside by convention?
A.Vendor\Module\Model
B.Vendor\Module\Setup
C.Vendor\Module\Block
D.Vendor\Module\Api\Data
Explanation: By Adobe Commerce convention, data interfaces that declare an entity's getters and setters live in the Vendor\Module\Api\Data namespace, while the service (operation) interfaces such as repositories live directly in Vendor\Module\Api. This keeps the contract layer clearly separated from implementation models.
9What does the EAV (Entity-Attribute-Value) model allow Adobe Commerce to do?
A.Add attributes to entities such as products and customers without altering the database schema
B.Store all product data in a single flat table for fast reads
C.Replace MySQL with a NoSQL document store
D.Cache rendered HTML blocks at the edge
Explanation: The EAV model distributes an entity's attributes across value tables keyed by data type (varchar, int, decimal, datetime, text), so new attributes can be added to entities like catalog_product or customer without schema changes. This flexibility comes at the cost of more joins, which flat catalog indexes help mitigate.
10Which entity types in Adobe Commerce use the EAV model by default?
A.Orders and invoices
B.Products, categories, customers, and customer addresses
C.CMS pages and blocks
D.Cron schedule records
Explanation: Catalog products, categories, customers, and customer addresses are the core EAV entities, allowing merchants to add custom attributes through the admin. Sales entities such as orders and invoices use flat tables, not EAV, for performance and predictability.

About the Adobe Commerce Developer Expert Exam

Exam AD0-E725 leads to the Adobe Certified Expert - Adobe Commerce Developer credential, validating expert-level skills to architect, customize, integrate, and deploy enterprise Adobe Commerce (Magento 2) solutions. The blueprint centers on Architecture (38%) including dependency injection, plugins, observers, EAV, service contracts, declarative schema, indexers, and cron; Customizations (32%) including extension attributes, multi-source inventory, B2B, GraphQL, and Web APIs; Cloud (16%) covering ECE-Tools, deploy phases, Fastly, and services configuration; and External Integrations (14%) covering Adobe App Builder, I/O Events, webhooks, and API Mesh. Adobe recommends 1-3 years of Adobe Commerce development experience before attempting this expert-level exam.

Questions

50 scored questions

Time Limit

100 minutes

Passing Score

33 out of 50 correct

Exam Fee

$225 (Adobe)

Adobe Commerce Developer Expert Exam Content Outline

38%

Architecture

Master module structure and load sequence, dependency injection with di.xml, plugins (before/after/around) versus observers and events, preferences, the object manager, proxies and factories, EAV, service contracts and repositories, declarative schema and db_schema_whitelist, UI components and layout XML, indexers with Mview, and cron groups.

32%

Customizations

Build extension attributes versus custom attributes, multi-source inventory with source selection algorithms and reservations, B2B companies, shared catalogs, payment on account and order approval, GraphQL resolvers and caching, REST/SOAP Web APIs via webapi.xml, ACL, data patches, custom entities, totals collectors, and pricing plugins.

16%

Cloud

Operate Adobe Commerce on cloud infrastructure: ECE-Tools and the build, deploy, and post-deploy phases; .magento.app.yaml and services.yaml; Fastly CDN and custom VCL; Starter versus Pro environments; Redis cache/session; RabbitMQ message queue and consumers; New Relic monitoring; and deployment variables such as SCD_MATRIX and WARM_UP_PAGES.

14%

External Integrations

Implement out-of-process extensibility with Adobe Developer App Builder, Adobe I/O Events, synchronous webhooks, API Mesh for unified GraphQL endpoints, the Admin UI SDK, integration access tokens and OAuth, and hybrid patterns that integrate ERP and OMS systems without customizing the Commerce core.

How to Pass the Adobe Commerce Developer Expert Exam

What You Need to Know

  • Passing score: 33 out of 50 correct
  • Exam length: 50 questions
  • Time limit: 100 minutes
  • Exam fee: $225

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Adobe Commerce Developer Expert Study Tips from Top Performers

1Know exactly when to use a plugin (before/after/around), an observer, or a preference, and remember plugins only intercept public, non-final methods on non-final classes.
2Spend the most prep time on Architecture (38%): di.xml, virtualTypes, proxies and factories, service contracts and repositories, declarative schema with db_schema_whitelist.json, and Mview-based indexing.
3Understand multi-source inventory deeply: reservations are written at order placement, but the Source Selection Algorithm (Source Priority vs Distance Priority) runs at shipment creation.
4Be fluent in the extensibility models: in-process modules versus out-of-process App Builder apps, and when webhooks (synchronous) versus Adobe I/O Events (asynchronous) are the right tool.
5For Cloud, memorize the build/deploy/post-deploy phases (the build phase has no DB or service access), ECE-Tools, services.yaml versus .magento.app.yaml, and how Fastly caches pages and GraphQL.
6For Web APIs, practice webapi.xml routes with ACL resources, integration access tokens, and the difference between extension attributes and custom attributes when exposing data over REST and GraphQL.

Frequently Asked Questions

What are the current exam facts for AD0-E725?

Adobe lists Exam AD0-E725 as an expert-level, online-proctored exam with a $225 USD fee (USD 150 in India), 50 questions in 100 minutes, and a passing score of 33 of 50 correct. The credential is valid for two years.

What does the AD0-E725 exam measure?

It validates expert skills to architect, customize, integrate, and deploy Adobe Commerce solutions. The four sections are Architecture (38%), Customizations (32%), Cloud (16%), and External Integrations (14%).

Which section carries the most weight on AD0-E725?

Architecture is the largest section at 38%, covering dependency injection and di.xml, plugins and observers, service contracts, EAV, declarative schema, UI components, indexers with Mview, and cron.

How much experience does Adobe recommend before taking AD0-E725?

Adobe recommends roughly 1 to 3 years of hands-on Adobe Commerce (Magento 2) development experience, including building custom modules, configuring API integrations, and deploying to cloud environments.

Is AD0-E725 based on Adobe Commerce 2.4.x?

Yes. The exam targets current Adobe Commerce 2.4.x, with recent guidance referencing version 2.4.7. Study current di.xml, declarative schema, GraphQL, MSI, B2B, and App Builder behavior.

What is the best way to prepare for AD0-E725?

Build custom modules end to end: practice plugins versus observers, service contracts, declarative schema, GraphQL resolvers, MSI source selection, and a cloud deploy. Then drill App Builder webhooks and I/O Events for the integrations section.