When using multiple backend servers behind a load balancer, the session data must be stored in a shared location that is accessible by all servers. Otherwise, the session data will be inconsistent and users may experience issues such as being logged out unexpectedly. Redis is a recommended option for storing session data in a distributed architecture, as it provides fast and reliable access to the data. The session host value in the env.php file must point to the Redis instance that is used for session storage. References:

Based on web searches, it seems that Magento uses different classes and interfaces to interact with configuration files, such as Data, Reader, and Converter12.

According to the documentation1, Data is a class that provides access to configuration data using a scope. Reader is an interface that reads configuration data from XML files. Converter is an interface that converts XML data into an array representation.

Based on these definitions, I would say that two possible steps that the Architect should make to meet the requirement are:

• C. Create a Data class that implements “\Magento\Framework\Config\Data”
• E. Make a Reader class that implements “\Magento\Framework\Config\Reader\Filesystem”

These steps would allow the custom module to read all the XML configuration files declared in the system, merge them together, and use their values in PHP class.

The Architect should make two steps to meet this requirement: C) Create a Data class that implements “\Magento\Framework\Config\Data”. This class will be responsible for reading and merging the custom xml configuration files and providing access to their values. The Data class should extend \Magento\Framework\Config\Data and use the constructor to inject the Reader class and the cache type. E) Make a Reader class that implements “\Magento\Framework\Config\Reader\Filesystem”. This class will be responsible for loading and validating the custom xml configuration files from different modules. The Reader class should extend \Magento\Framework\Config\Reader\Filesystem and use the constructor to specify the file name, schema file, and validation state of the custom xml configuration files. Option A is incorrect because writing a plugin for \Magento\Framework\Config\Data::get() will not define a new xml configuration file, but rather modify the existing one. Option B is incorrect because appending the custom xml file name in “Magento\Config\Model\Config\Structure\Reader” in di.xml will not define a new xml configuration file, but rather add it to the system configuration structure. Option D is incorrect because injecting a “reader” dependency for “Magento\Framework\Config\Data” in di.xml will not define a new xml configuration file, but rather use an existing one. References:

To display customer-specific content on the home page to Customers with “my.attribute” greater than 3, you need to use the following steps:

• Use customer-data JS library to retrieve “my.attribute” value. The customer-data JS library allows you to access the customer data stored in the local storage of the browser. You can use the get() method to get the value of “my.attribute” for the current customer.
• Add a new context value of “my.attribute” to Magento\Framework\App\Http\Context. The HTTP context is a mechanism that allows you to vary the cache of a page based on some parameters. By adding a new context value of “my.attribute”, you can cache separate versions of the home page for customers with different values of “my.attribute”.
• Add a custom block and a phtml template with the content to the cms_index_index.xml layout. This step will create a block that will display the customer-specific content on the home page. You can use the phtml template to check the value of “my.attribute” and render the content accordingly.