Top Most Magento Interview Questions and Answers

Magento is a rich-feature e-Commerce open-source platform written in PHP, which provides online traders with an exceptional flexibility and control over the content, look and functionality of their e-commerce store.Magento offers powerful marketing, search engine optimization, and catalog-management tools.

Question 1: What architecture is used by Magento?

Ans: Magento architecture is a model–view–controller architecture.Each system is slightly different, but all have the goal of separating data access,business logic, and user-interface.

Question 2: How to upgrade to the latest version using Magento Connect?

Ans: Upgrading Magento to the latest version is a fairly simple task. Copy and Paste this key magento-core/Mage_All_Latest VIA Magento Connect where it states Paste extension key to install:. This will upgrade Magento to the latest version.

Question 3: Mention what technology does Magento use?

Ans: Magento use PHP as a web server scripting language and MySQL for database.

Question 4: Difference between Mage::getSingletone() and Mage::getModel() in Magento?

Mage::getModel() will always return a new Object

        public static function getModel($modelClass = '', $arguments = array()) {
            return self::getConfig()->getModelInstance($modelClass, $arguments);
        }

public static function getModel($modelClass = '', $arguments = array()) {

return self::getConfig()->getModelInstance($modelClass, $arguments);

}

Mage::getSingleton() will check whether the Object of the given model already exists and return that if it does

        public static function getSingleton($modelClass='', array $arguments=array()) {
            $registryKey = '_singleton/'.$modelClass;
            if (!self::registry($registryKey)) {
                self::register($registryKey, self::getModel($modelClass, $arguments));
            }
            return self::registry($registryKey);
           }

public static function getSingleton($modelClass='', array $arguments=array()) {

$registryKey = '_singleton/'.$modelClass;

if (!self::registry($registryKey)) {

self::register($registryKey, self::getModel($modelClass, $arguments));

}

return self::registry($registryKey);

}

Question 5: Mention what are the basic features of Magento?

Ans: Basic features of Magento includes are:

Reporting
Analytics
Site Management
Product and Catalog Management Tools
User Management
Order Management
Payment Management
Shipping Management
Business Intelligence
powerful marketing promotions and Search engine optimization Tools
Checkout management
Support

Question 6: Mention what is the limitation of Magento?

Runs on PHP, Enterprise style Java code – this means it takes up a lot of memory during processes
Slow in performance

Question 7: How we can enhance the Magento performance?

Disable the Magento log
Disable any un-used modules
Magento Caching
Enable Gzip compression
Optimize your image
Optimize your Server
Use a Content Delivery Network (CDN)
USE Gzip Components
Combine external CSS/JS into one file
Avoid CSS Expressions
MySQL Query Caching

Question 8: Why Magento use EAV database model ?

In EAV database model, data are stored in different smaller tables rather than storing in asingle table.product name is stored in catalog_product_entity_varchar tableproduct id is stored in catalog_product_entity_int tableproduct price is stored in catalog_product_entity_decimal tableMagento Use EAV database model for easy upgrade and development as this model gives more flexibility to play with data and attributes.

Question 9: Explain about the Modules of Magento?

Ans. Magento supports installation of modules through a web-based interface accessible through the administration area of a Magento installation. Modules are hosted on the Magento eCommerce website as a PEAR server. Any community member can upload a module through the website and is made available once confirmed by a member of the Magento team. Modules are installed by entering a module key, available on the module page, into the web based interface.

There are three categories of modules hosted on Magento Connect:

Core Modules
Community Modules
Commercial Modules

Core and Community modules can be installed via the administration area. Commercial module pages provide price information and a link to an external website.