Magento 2 Certified Developer(MCAD+MCPD)

You're tasked with investigating a custom page layout declared in MyCompany/MyModule that isn't loading. You've determined that this is result of your XML configuration. Which 2 files do investigate to locate issue? - Answer- A.My/Mod/view/frontend/ B.|| /page_layout/ building an extension that will be sold on Magento marketplace. This mextension depends on Magento_Catalog.How is a Magento database upgrade performed? - Answer- Manually on CLI A merchant would like to manually specify order of products per category. How is this done? - Answer- There is a position field on category management page which allows to define order of a product in category. What happens when a customer adds two of same simple products with different custom options to cart? - Answer- will shown as two separate line items. DESCRIBE MAGENTO'S MODULE-BASED ARCHITECTURE? - Answer- **Five areas: adminhtml, frontend, base, webapi_rest, webapi_soap & cron. cron used when running cron jobs. **Three necessary files: to bootstrap a module , etc/ & . How many folder module-based architecture keeps that module's files? - Answer- In One Folder How many Places Modules live in Magento2x? - Answer- Two places: r/vendor-name/module-name How many required files to initiate a module of Magento2x? - Answer- Two: What is responsibility ? - Answer- Included by Composer autoloader (app/etc/NonComposerComponentR) What is responsibility etc/? - Answer- 1.Adds static list of components in MagentoFrameworkComponentComponentRegistrar. Once it is there, Magento will look for etc/ 2.Specifies setup version & loading sequence for module 3.S