What are Objectives of an operating system?

The objectives of an operating system are : Providing the ‘user-friendly’ interface so that the user need not bother about the underlying hard-ware. The commands given by user in an natural language are interpreted by the operating system, which in turn uses the hardware to get the required task done. Creating an environment for other … Read moreWhat are Objectives of an operating system?

Ways Computer System Communicate with I/O Devices.

There are four ways a computer system communicate with I/O devices. Direct control Programmed I/O Interrupt driven I/O Direct memory access Direct control : Old and obsolete technique. CPU interact directly with I/O devices with the help of dedicated program. Processing is extremely slow. Programmed I/O : CPU and I/O devices communicates through ‘Device Status … Read moreWays Computer System Communicate with I/O Devices.