Cracking an interview is no joke. Irrespective of how many hours you have put into preparation, you can still get stuck in a maze.
Knowing what kind of questions are commonly asked can never hurt an individual. In case you are a Magneto expert, you might be a know-it-all but it doesn’t hurt to be on the safe side, right?
If you are looking to crack the Magneto hiring interview, don’t worry as we have got you covered. The following write-up covers 10 of the most popular questions that are often asked by many companies during the interview and may help you in excelling in your Magento 2 interview.
Let us begin.
Question 1– Magneto 2 has a total of how many design patterns?
Answer 1– The Magneto 2 comes with a total of 20 design patterns. Here is the list of patterns included;
- Factory Pattern
- Singleton Pattern
- Model View Controller Pattern
- Front Controller Pattern
- Registry Pattern
- Prototype Pattern
- Iterator Pattern
- Object Pool Pattern
- Service Locator Pattern
- Lazy Loading Pattern
- Observer Pattern
- Module Pattern
- Service Contract
- Object Manager (which consist of 11+ Design Patterns)
- Proxy Pattern
- Factory Classes
- Dependency Injection
- Injectable Objects
- Non-injectable objects
- Active records
Question 2- Define the concept of MVC architecture?
Answer 2– Popularly known as the Model-View-Controller, MVC, in general terms, is a software architecture model that is used by Magento 2 and the model is majorly responsible for the organization of the entire system processing structure at the coding level and for also setting the means for system flexibility and scalability.
The model comes with three distinguished layers that are specifically designed to achieve high cohesion and loosely coupled modules that are responsible for the operation of the Magneto 2 system.
Model- System modeling level. The primary scope of this is the processing of the system’s business rules and data persistence.
View- This layer of the software is responsible for the user information’s display layer that contains product pages and contact forms. All this is controlled via layout files that combine blocks, containers, and UI components into the pages so the web browser can put them on display.
Controller- The third and final layer defines all of the primary actions, requests, and responses of the customers that can further change the status of the model and generate a view of the model layer data. It controls the arrangement of page flows and forms submissions. Standard MVC pattern is followed by Magneto which offers a great parting approach for improved modularity.
Defining these concepts is pretty important for better development. It is highly recommended that you built these concepts when it comes to technical aka coding issues.
Question 3- State the command that can be used to enable or disable a Magneto 2 module?
Answer 3– PHP bin/Magento module:enable module_name
PHP bin/Magento module:disable module_name
Question 4- Define EAV and what it represents?
Answer 4- EAV stands for Entities, Attributes, and Values. Below we have mentioned the three separately so you can better understand;
Entity- This represents all the data items such as products, categories, customers, and orders. Every entity has its own entity record in the database.
Attributes-All the data elements that belong to entities are represented by attributes. For instance, a product entity has attributes such as name, status, price, and many others.
Values- This is the simplest to understand out of them all three. It is simply linked to an attribute. Suppose if an entity is a product, defined by attributes like color, size, etc. it would make the value orange, large, etc.
Question 5- Mention the steps required to create a simple custom module in Magneto 2?
Answer 5– Simply follow the steps mentioned below to carry out a custom module in Magneto 2;
- Start by creating a module folder.
- After you have done so, create the etc/module.xml file.
- Now, you will need to generate the registration. Php file.
- For the next step, run the bin/magneto set up: upgrade script for the installation of the new module.
- Finish by checking whether or not the new module is working.
Question 6– Explain how the performance of Magneto 2 can be improved?
Answer 6– Here are some of the admin level tips that can help you to improve the performance of Magneto 2;
- Make sure to install the latest version.
- Page caching
- Cache management
- Try to enable a flat catalog
- Clean Magneto logs and database
- Merge CSS and JavaScipt files
- Optimize images
- Try having fewer modules and extensions
Below are some server-side tips to improve the performance;
- The installation of a CDN
- Configuration of SQL
- Select a Magneto specialized hosting provider
Question 7- How can we add a new theme to Magneto 2?
Answer 7- One can carry out the steps that are mentioned below to add a new theme in the Magneto system;
- Begin by creating a directory for the theme under app/design/frontend/<your_vendor_name>/<your_theme_name>.
- Next, add a declaration file theme.xml to generate the, etc directory.
- For the next step, create a file view.xml to the theme directory.
- Move forward by adding a composer.json file and registration.php.
- Finish by configuring your theme in the admin panel.
Question 8- State the steps used to alter the core Magneto API settings?
Answer 8- The API settings of Magneto can be altered with the use of the steps mentioned below;
- Visit the admin menu.
- From there, select the system option to choose the configuration option.
- From the left side of the panel that is just under service, you will need to select Magneto core API.
- Now, open the general settings and expand the menu to proceed further.
- Type out the details of the Default Response Charset.
- After you are done, fill the client session timeout (secs).
- In order to enable the WS-I compliance and WSDL cache, click yes.
- For the last step, click on the save config option.
Question 9- Why is Magneto 2 better than Magneto 1?
Answer 9– The prime difference between the two is that Magneto 2 is faster, SEO friendly, and comes with a more user-friendly interface than Magneto 1. The overall speed of the site is also improved in Magneto 2 as it uses the latest PHP.
The pages load faster than Magneto 1 and can also take more orders. Meta tags are also offered by Magneto 2, something that was missing in Magneto 1.
Question 10- How can one count the items in a collection?
Answer 10– getSize() can be used to count the number of items in a collection. This function does not load the collection every time to calculate the item, it stores it instead. This in turn makes it easier for you as you don’t have to recalculate every time you need a value. The counting process is sped up using the SQL COUNT() function although the value may become inconsistent.
This sums up the list of some of the most popular questions that are commonly asked in Magneto 2 interviews. You can help us by giving us your feedback in the comments section.