Layers a. presentation b. data management c. all of them are always on the client side. layer d of the application stack

What is a subroutine closure? What is it used for? How is it implemented?

Code for the following: Web application is written using the MVC (Model, View, Controller) architecture Web application is written using object-oriented PHP programming, including classes for: Database Connection & Information Products table model Products table DB Products table controller Categories table model Categories table DB Categories table controller Web application includes 3 user interface pages: Index/landing/navigation page Title: "Your Name Wk 3 GP" Page Header: Your Name Product Information Includes navigation links to all other pages Filename index.php Database Connection Status page Title: "Your Name Wk 3 GP" Page Header: Your Name Database Status Includes: Text display of the database name Text display of the database user ID Text display of the database password Text display of the status of the connection (successful or unsuccessful) Navigation link to the home page Filename db_conn_status.php Products page (and Product Add/Update page) Title: "Your Name Wk 3…

Describe the concept of containerization and how it is used in modern IT environments.

What are the advantages of an HTTP website versus a file system website? When it comes to encapsulation and inheritance, what are the differences?