What are Jenkins Interview Questions and Answers

Magento interview questions

Introduction to Magento Interview Questions and Answers

Magento is open source e-commerce software from Varien Inc. that is primarily used for online commerce. Magento uses the e-commerce platform, which offers organizational solutions and comprehensive support. It has a flexible modular architecture, so it is scalable with many control options that are helpful to end users. Magento allows users to update the ecommerce website automatically. It's easy to use, fast and versatile at the same time. There are several benefits associated with using Magento, such as: B. Searching and sorting products in different ways. It also easily integrates with many of the third party websites that are required to run an effective ecommerce website. Support for multiple languages, currency, tax rates, integrated search engine optimization (SEO) are some useful features of Magento.

Now, if you are looking for a Magento related job, you need to prepare for the 2019 Magento Interview Questions. It is true that every interview is different from the different job profiles, but to clear the interview up you need to have a good and clear knowledge of Magento. Here we have prepared the important Magento interview questions and answers to help you have a successful job interview.

Below are the top 15 Magento Interview Questions and Answers for 2019 that are frequently asked in an interview. These questions are divided into the following parts:

Part 1 - Questions about the Magento interview (basic knowledge)

This first part covers basic questions and answers about Magento interviews

Q1. Define Magento with its architecture?

Magento is an open source technology-based e-commerce platform that provides the online business with flexibility and control over the content, appearance, and functionality of the e-commerce business. Its architecture is a PHP MVC (Model-View-Controller) application with all controllers in one folder and all models in another. Based on their functionality, files are grouped together, which in Magento are called modules. There are several versions of Magento including:

  • Magento Enterprise
  • walk
  • Magento community

Q2. What technology does Magento use?

These are the most frequently asked questions about Magento interviews. There are several technologies used by Magento with its web server and database components. The web server is created with PHP scripting language, while the database part is administered by MySQL. The data model used by MySQL is based on the EAV, ie the entity-attribute-value model, the main feature of which is to store data objects in a tree structure. The use of a tree-like structure has the advantage that the data structure can now be changed without changing the database definition. At the same time, however, the EAV-based data model approach is expensive and should only be considered if a developer is unsure about a number of fields in a table and may vary in the future. A major advantage of the EAV technique is that a developer can virtually add an unlimited number of columns to the table, with one table containing all of the attribute data and other tables containing the entity and value for each mentioned attribute.

Let's move on to the next questions and answers about the Magento interview.

Q3. What is the difference between Mage :: getSingleton () and Mage :: getModel ()?

Mage: getSingleton () only creates a single object for a given class. If the object is already being created for the same class, it will not be created again. As the name suggests, it uses a singleton design pattern. The use of singleton design patterns is applicable in scenarios where a developer is just creating a single object and later wants to use the same object, modify it, and get it, but does not want to create a new object. The session object could be an ideal example of this pattern, where a user can add or remove values ​​from different pages in an application so that the value is retained but a new session object is not created. If you create a new session item, your recent changes will be lost. These are the basic questions about the Magento interview in an interview.

Mage :: getModel () creates a new object every time its class is called. Unlike the singleton method, it can be used in a scenario where a developer needs new data from the database.

Q4. What is the difference between EAV and flat model in Magento?

Both models have big differences in their schema and strategy for storing the data.
EAV is more of a normalized form of the database model. The main feature of the EAV-based approach is that each column value is stored in its respective data type table. Product and model-related data can be saved in their respective data type table. Product ID, product name, product price and the creation date are stored in the respective data type table. This means that a developer has to link multiple tables to get the product details, which adds complexity to EAV-based approaches.
In contrast to the EAV-based approach, the flat model uses a single table. Unlike its EAV counterpart, it is not normalized and therefore uses more database memory. A key characteristic of the flat model is performance because only a single query can load the entire product. As a result, developers don't have to perform complex join queries to get product details. These are the most common Magento interview questions asked in an interview.

Q5. Explain the concept of handles in Magento?

The structure of a page in Magento is taken from handles. A handle would decide which block should be displayed with its position. Handles are called for each page, and each page request can contain multiple and unique handles. Several product handles belonging to a virtual product type are used to edit the product page. When a page needs to be invoked for a simple product, the corresponding handle is invoked, while the virtual product requires the virtual handle. The handle for indexes can be generated by combining pattern, a front name and action controller, ie index. Handles are only called when their specific URL is accessed.

Let's move on to the extended part of Magento Interview Questions and Answer and see how we can crack the interview and get a good job opportunity

Q6. What is CodePool in Magento?

To register a new module in app / etc / modules / sample_module.xml, a developer must supply a tag file called codePool. There are three types of code pools available, starting with core used by the core team, community code pool used by third-party extensions, and local code pool used for module development in hours. The local code pool can also override the core and community code pool if necessary.

The code pool is located in the / app / code directory.

Q7. How many types of sessions are available in Magento?

Two types of sessions are used: customer and checkout sessions. All customer-related data is blocked with the customer session, while data on orders and offers are stored in the checkout session. Session types are used separately because the order is placed and information about the session data needs to be deleted. It therefore makes sense to have two different sessions for order-related and customer-related data. Example - The first name of the customer session is $ _SESSION ('customer') ('firstname'). The similar example also works for the checkout session. These are the useful Magento interview questions asked in an interview.

Part 2 - Magento Interview Questions (Advanced)

Now let's take a look at the advanced Magento interview questions.

Q8. What are the different ways to improve Magento performance?

There are several ways to improve performance in Magento. Some of them are listed below:

  • Deactivate unused modules
  • Activate Magento caching
  • Optimize images
  • Disable the Magento protocol
  • Combine external CSS / JS in a single file
  • MySQL query caching
  • Enable gzip compression

Q9. How can the Magento environment and configuration be optimized?

There are several ways to optimize the Magento environment. Some of them are listed below:

  • The Magento application can be optimized using cloud computing.
  • JavaScript and CSS can be merged into a single file, which significantly reduces loading time as only a single file is loaded.
  • Do not host unused files on a web server to optimize the configuration.
  • Identify and deactivate unused Magento modules.
  • For faster performance, never run MySQL and the web server on the same computer.
  • Update to the latest Magento version for better performance.
  • Magento uses complex databases. So if you run a database on a dedicated server, the performance will be dramatically improved.

Let's move on to the next questions and answers about the Magento interview.

Q10. What is Magento Payment Gateway?

The payment gateway securely processes the credit card data between customer and dealer, between dealer and payment processor. It is like a checkpoint that protects customers from collecting personal and financial information from customers and that also acts as an intermediary between the merchant and the sponsoring bank.

Q11. How can I display a selected number of products to guests in Magento?

To only show selected products, go to the toolbar and you will see:

app / code / core / Mage / catalog / block / product / list / Toolbar.php

Then go to the following method:

There you will find the following code:

Here in this code you need to change the $ limit variable and override that block in a local pool. Do not make any changes directly in the core. To check if the customer is a guest please use the following:

Q12. What is the difference between omni-channel retailing and multi-channel retailing?

Multi-channel retail offers various platforms for a business such as the internet, mobile phone, television, etc. to increase sales of the product.

Omni Channel is one step ahead of Multi-Channel and offers the same brand experience despite the channel or medium used by the customer.

Q13. How do you add a blog to Magento?

To improve your search engine ranking, sales blogs are important. There are two ways to add blogs in Magento:

  • How to use the default Magento blog extension.
  • Create a custom blog module.

Once that's done, install and configure the blog extension.

Q14. What is the difference between pay and capture information?

Pay is used when an invoice needs to be classified as paid. This is used when paying online or offline. Capture is used when the actual payment processing is online and the capture () payment method is used. As soon as this is done, pay () is called.

Let's get to the final questions and answers about the Magento interview.

Q15. Explain the compilation function of Magento.

This is the most popular question asked in a Magento interview. This feature of Magento helps the user to compile all files to create a single include path and improve performance. The performance can be increased by 25% to 50%. To use this tool, the directory contains the file includes / config.php, which should be in write mode.

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