What is resource abstraction in operating system?

Resource abstraction is a technique used in operating systems to hide the details of a resource from users and programs. By hiding the details of a resource, the operating system can provide a simpler and more consistent interface to users and programs.

Resource abstraction is used to hide the details of many different types of resources, including hardware resources, software resources, and data resources. Hardware resources include devices such as printers and disk drives. Software resources include files, network connections, and process control blocks. Data resources include databases and message queues.

The operating system manages all of these resources and provides a consistent interface to users and programs. Users and programs access resources through system calls, which are abstractions of the underlying resource. For example, the open system call is used to open files, and the read system call is used to read data from files.

The operating system also provides a variety of other services to users and programs, such as process control, memory management, and file system management. These services are also implemented using resource abstraction.

Resource abstraction is a powerful technique that allows the operating system to hide the details of its implementation from users and programs. By hiding the details of its implementation, the operating system can provide a simpler and more consistent interface to users and programs.