Magento 2 Interview Questions and Answers for 2025

At the programmer level for both PHP and Magento 2 software, composer serves as a package manager in Magento 2. Magento offers a common framework for managing the dependencies of the Magento 2 application and necessary libraries. Composer enables for library autoloading and the installation of PHP programs from the "Packagist" database.

Magento project's composer file handles its libraries and dependencies and facilitates installing them in the vendor directory. Version dependencies are thus kept in the composer.lock file. For each package in the dependency tree, these dependencies must adhere to the version requirements.

To produce a single include path that will improve performance, you can use Magento's compilation feature to compile every file in an installation. Only production mode requires compilation. You do not need to conduct compilation if you are developing. 

The following features are included in the Magento code compilation. 

1. Code Generation for Repositories 
2. Interception Cache Generation 
3. Application Code Generation for Proxies and Factories 
4. Area Configuration Aggregation. 
5. Service Data Attribute Generation 

One of Magento 2's features is the registry pattern, which makes objects and data accessible in the public scope. These objects and data can thus be used by any resource. For instance, the internal registry, which serves as the global-scoped container for data storage, can be used to store all singleton patterns.

In this case, objects and data are registered using the Mage::register function. Using the mage::unregister function, you can register data and objects in reverse.

Google offers the online payment processing service known as Google Checkout. Online stores can integrate Magento with Google Checkout. Similar to PayPal, it makes payment for internet goods simple. Customers must have a Google Checkout merchant account to utilize Google Checkout.

The procedures listed below assist in setting up a Magento store with Google Checkout: 

• Login into the Magento Admin Panel. 
• Go to the System menu and click on Configuration option. 
• On the left side of the navigation bar, click on the Google API under sales section 
• The Google Analytics panel can be expanded to reveal some parameters, including 
  • To enable the payment method, set the Enable option to Yes. 
  • Google Analytics and Universal Analytics are the two types available under the type choice. 
  • Your account number is recognized by Account Number. 
  • Set the Enable IP Anonymization option to Yes. 

After done with the settings, click on the Save Config button on the top right corner of the page to save the changes that you have made. 

This question is a regular feature in Magento 2 tricky interview questions, be ready to tackle it.  

To alter a Magento core API configuration, you must follow the below instructions:  

1. Go to the Admin menu and  select System -> Configuration. 
2. On the Configuration Panel's left side, under Services, click Magento Core API. 
3. Expand the General Settings area by clicking. 
4. To use the default response charset, type its name. 
5. Determine the Client Session Timeout in seconds. 
6. Click the save config button when done. 

Both SOAP and XML RPC protocols are supported by Magento Core API. The Customer, Catalog, and Order modules of your store are accessible through the permission-based API. By default, the API default character set is UTF-8, and the timeout for client sessions is 3600 seconds. 

Patches are typically collections of essential files that are needed to fix online programmers' security flaws. By replacing the existing translations, connect patches in Magento make it simpler to install packages. For instance, Magento makes its apps more secure by using HTTP rather than FTP to obtain extensions. 

The following benefits are obtained by applying Connect Patches: 

1. During installation, make it possible for packages to be installed quickly and overwrite any translations that may already be in place. 
2. To improve security, Magento Connect downloads extensions using HTTP by default as opposed to FTP. 
3. Allowing the dash character in the name of new extensions will help the extension developers. 
4. Anyone attempting to install an extension with insufficient file system access will  be alerted to the Magento administrators. 

There are several reasons why the folder structure in Magento is significant. A couple of them are listed below: 

1. The many files and resources of the Magento application are organized, which makes it simpler to find and maintain them. 
2. It offers a distinct division of labor as well as a hierarchy of files and resources, which makes it possible for the Magento application to run efficiently. 
3. By enabling developers to insert new code and resources in the proper places, it helps to guarantee that the Magento application can be readily extended and changed. 
4. By keeping private files and resources isolated from those that are exposed to the general public, the Magento application's security and stability are improved. 

A composer.json file that contains the list of components and their dependencies makes up a metapackage. Metapackage acts as the root package when many packages are used in a Magento application's extensions. As a result, metapackage will manage these packages collectively. 

A package of your extension should be created by performing a zip operation on the directory with your extension. To package a component: 

• Create a Magento Composer file (composer.json) 
• Register the component using registration.php 
• Package and publish your component. 

Magento Profiler, or MAGE PROFILER supports two main tasks. Enabling integrated profiler dependency charts being shown on a Magento website.

Additionally, the built-in profiler provides performance analysis. A collection of item dependents, their dependencies, dependencies for dependencies, and so forth is all that a dependency graph is about.

It can provide us with a wealth of information on the specific code blocks that contribute to a page loading slowly, including how long it takes for each block to finish its job. The type of profiling we do is determined on the analytical techniques we employ. Magento now supports a variety of formats, including HTML, CSV, and Firebug.

Dependency injection is a design approach supported by Magento 2 that enables specifying object A's dependencies on object B. Because it is an external object, object B gives object A dependencies. Dependency injection essentially takes the place of Magento 1's functionality in a Magento application.

One should use abstractions in their code and adhere to the dependency inversion approach to reduce code dependencies. This means that instead of directly interacting with low-level classes,  high-level classes should make use of their interfaces.

When Magento modifies the underlying implementation of certain interfaces, the danger of incompatibility errors is decreased by using interfaces in the code. It also enables one to concentrate on a class's functionality rather than its implementation.

Before doing an upgrade, this program is used to find potential code issues and repair them. In other words, it is a command-line tool that locates important problems, errors, and warnings in codes and fixes them before upgrading.

The store owner can use the Upgrade Compatibility Tool to detect potential customizations in advance of upgrading Magento Commerce, which makes the process more transparent and lowers the cost of performing regular upgrades.

The Upgrade Compatibility Tool is currently available in alpha form and can be obtained as a composer from the Magento repository.

Origin Cloaking is a security feature that shields cloud resources from slow traffic, including DDoS attacks. This feature makes sure that all network traffic passes through the internal Web Application Firewall (WAF) in the load balancer and the fastly Web Application Firewall (WAF).

In general, the composer file facilitates installing the libraries and dependencies in the vendor directory and handles the dependencies and libraries of a Magento project. In this method, version dependencies are kept in the composer.lock file. The versions requirements for each package in the dependency tree must be met by these dependencies.

Magento compiles numerous scripts into a small number of JavaScript bundles when bundling is enabled. The Magento website then downloads these bundles for each page. In this case, browsers carry out the downloading in sync. Magento pauses page rendering while bundles are downloading until they are all finished.

The best element of bundling is that we could choose where to load a given bundle. For instance, we want to bundle everything relevant to checkout and just load it on the checkout page.

The four steps listed below are used to package a component in Magento 2.

1. Setting up the composer.json file for Magento
2. Registering a component using the registration.php file's assistance
3. Creating and putting the component together
4. viewing a composer.json sample file.

Tables, buttons, and dialogue boxes are just a few of the several front-end elements that are represented by Magento user interface (UI) components. Use pHTML templates with embedded JavaScript, XML layout, jQuery widgets, or UI elements to implement them.

Magento encourages the use of UI elements to create a positive user experience and guarantee the seamless operation of all website functionalities, especially those requiring asynchronous startup. This makes it possible for a Magento 2 developer to build more complex UI components out of simpler ones (e.g., for the store checkout page).

A must-know for anyone heading into a Magento2 interview, this question is frequently asked in Magento 2 advanced interview questions.  

Developer, Product, and Default deployment modes are the three that a Magento 2 developer needs to be aware of. 

• Developer- When you enable this mode, all files you save to the pub/static directory (apart from front-end errors) turn into symlinks to the original files. This mode makes the page load slowly, making it inappropriate for keeping an app in. 

On the other hand, because it increases the effectiveness of compilation and static loading, developers typically employ this mode for debugging. 

• Product- Every file in pub/static is created while the computer is in production mode. As the name suggests, this is the greatest mode to use for all phases of  development. 
• Default- Between the Developer and Production modes, Magento's default mode may be found. New files are created, however, this only happens when the front end needs a new asset. In the default mode, no file may be produced more than once.

The following actions must be taken in order to install a new theme to the Magento system: 

1. Create a directory called "your theme name" inside app/design/frontend/"your vendor name" 
2. Add the theme.xml declaration file, then create the etc directory. 
3. Make a view.xml file and add it to the theme directory. 
4. Include the registration.php and composer.json files. 
5. Create directories for fonts, CSS, JavaScript, and pictures. 
6. In the Admin page, set up your theme.

There are various techniques through which we can increase the functionality and change the behavior of Magneto 2 . 

Techniques that are used to improve the functionality are as follows: 

1. Overriding core-classes 
2. Using event and observers 
3. Creating custom modules 
4. Using third-party extensions 
5. Customizing the frontend

When code is generated, factory classes are also created. For models that depict database entities, they are generated automatically.

Since Magento discourages direct usage of Object Manager, feature records are created, retrieved, or changed using factory classes instead. Although they are not required, these classes can be manually defined if we want to define particular behavior.

Numerous extensions are available that may easily add blog capability to practically any Magento store. However, it is also carried out in a remarkable enough manner to support the preservation of the distinctive design that already works wonders for every ecommerce retailer. They are more than sufficient for SEO and ecommerce blogging. Blog sections will be visible in the Magento 2 dashboard once it is deployed, making it very simple for admin to handle.

The Magento Blog extension is incredibly handy and comes with a tone of functionality, but if I want further customization, I might want to create my own blog module.

• Primary Key- A primary key typically emphasizes the table's singularity. Every row in the database is individually distinguished by a column or collection of columns. It signifies there shouldn't be any duplicate values. Furthermore, it doesn't have a NULL value. 
• Foreign Key- Building a connection between the two tables typically involves the use of a foreign key. Data integrity maintenance between two different instances of an entity is the foreign key's primary goal. 

It's no surprise that this one pops up often in Magento 2 tricky interview questions 

You don't want your website to load slowly due to awkward code because Magento is a fairly complex platform. Because of this, a developer ought to be aware of and adhere to Magento development best practices: 

Create reusable code to avoid duplicating it, which is difficult to maintain. 

1. Create replaceable code to make updates and improvements simple. 
2. Be careful not to design assistance classes that go against the rules of object-oriented programming. 
3. Keep your name and case conventions consistent. 
4. Choosing composition over inheritance will make it simpler to maintain Magento extensions. 
5. Before making the code public, test it.

Although Magento 2.4 is the most recent version of the software, many retailers continue to use Magento 2.3. In particular, Magento 2.3 featured a novel declarative database schema method. Now, patches are coded as a separate PHP class, and all tables may be specified via.xml files. Building on that strategy, Magento 2.4 supports Elasticsearch as the catalog search solution. It also supports PHP 8.0 and provides new support in GraphQL. Additionally, declarative schema usage is the most recent trend in.

A common question in Magento 2 developer interview questions, don't miss this one.

Using the Magento CLI, you can install and configure Magento primarily. The following are some examples:

1. Installing commerce, building the deployment configuration, building the database schema, and changing the database schema.
2. Managing indexes via reindexing and clearing caching
3. Creating plug-in factories and interceptors; noticeably, they are of nonexistent classes
4. Using static view files to deploy
5. Putting together translation dictionaries and packages
6. Creating the setup for dependency injection to support object management.

The framework registers commands in accordance with the modularity strategy. Each module has the ability to add commands to the CLI, and the code stays in the module. Command development will become simple, and developers can benefit from dependency plugins, injections, and other features.