Suppose you want to develope a custom extension that should provide product_redirect_links to amazon.com, ebay.com and other sites. Suppose this must be added using extension_attribute feature to make that availbe for product repository and services, then what are the customizations needed to develope it: Choose 2

A client uses an external PIM for managing product information. They want to run a cron job every minute to update and create products. The site is using the "Update by schedule" index mode and the full page cache is enabled.
What is required to make these updates visible on the frontend?

You are working on a customization that requires a list of shipping rates available to a user. Which call returns the list of shipping rates?

You have a task to modify the grand total on the checkout page with a negative price adjustment which depends on the shipping address postcode. What are two approaches to be used in this case?

Suppose you are asked to disable/remove the customer review related functionalities. You can not disable the review module directly because the customer module depends on it. What is the possible way to remove all HTML outputs of the review module, from the frontend and backend? :