For an existing core class, you created 3 plugins PluginA, PluginB and PluginC with sort orders 10, 20 and 30 respectively. but when implementing pluginB you used around method and did not used callable in it.What should be the plugins executaion order as per above scenerio:

To prevent Cross Site Scripting (XSS) attacks, Magento templates use different methods to escape the output on the website before displaying it to the user. What three methods does Magento use to prevent this kind of attack?

You are integrating an external system from which products and categories will be synchronized with Magento.
To keep the category tree synchronized, an identifier attribute needs to be added to the catalog_category entity. The identifier value is generated by the external system as an unsigned 3 byte integer and is global in scope. Your code will run many concurrent queries to select categories based on this ID in order to synchronize changes.
Keeping performance in mind, what attribute backend type do you choose when creating the EAV attribute?

You have a requirement to customize the Product Detail Page so users can enter their ID in a custom field and get a personalized price. The user has to see the lower of the personalized and the Magento price.
Which two actions do you take to enable the personalized price on the Product Detail Page and the checkout?

You want to display customized product list along with it's tier prices. To render this price which class should be used and which data needs to be provided ?