Question

operating systems are typically defined as fulfilling two roles. Describe each role with example​

Answer 1

Answer:

The operating system acts as an interface between the hardware and the programs requesting I/O. It is the most fundamental of all system software programs.

Responsibilities of the OS include:

Hiding the complexities of hardware from the user.

Managing between the hardware's resources which include the processors, memory, data storage and I/O devices.

Handling "interrupts" generated by the I/O controllers.

Sharing of I/O between many programs using the CPU.

There are two types of software:

System Software - programs that manage the operation of a computer.

Application Software - programs that help the user perform a particular task.

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Answer 2

Answer:

Explanation:

An operating system has three main functions: 1 manage the computer's resources, such as the central processing unit, memory, disk drives, and printers, 2 establish a user interface, and 3 execute and provide services for applications software. Keep in mind, however, that much of the work of an operating system is hidden from the user; many necessary tasks are performed behind the scenes. In particular, the first listed function, managing the computer's resources, is taken care of without the user being aware of the details. Furthermore, all input and output operations, although invoked by an applications program, are actually carried out by the operating system. Although much of the operating system functions are hidden from view, you will know when you are using an applications software package, and this requires that you invoke-call into action-the operating system. Thus you both establish a user interface and execute software.

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