Question

With respect to a general multitasking system

What mechanism allows operating system routines to get more control of the CPU than user tasks?

What are the two states a task can be in while waiting for control of the CPU?

Answer 1

With respect to general multitasking system

What mechanism allows operating system routine to get more control of the CPU than user tasks --

• The protection - mechanism allows operating system routine to get more control of the SPU than user tasks, it represent the mehanism to control the access of program, procesess to the resources which is defined by the computer system.
• The major activities of operating system in protection include --
• The operating system make sure that all access to system resources is controlled.
• The operating system make sure all the external input and output divices are protected from invalid access attampts.
• The operating system provide authentication features for user in password.
• Operating system is interface in between computer hardware and computer user.
• The operating system is software that perform all the basic task including -- process management, memory management, file management, handling input and output, and control the devices like printers and disk drivers.
• The operating system include -- Windows operating system, Linux operating system, and VMS.
• The operating system provide services which include -- program execution, file sytsem manipulation, input output operation, Communication, error detection, resource allocation and protection.
• The computer system which have multiple user and concurrent execution of multiple process, these process should be protected from each other's activities.

What are the two states a task can be in while waiting for control of the CPU --

• The two states a task can be in while waiting for control of the CPU is - Ready and waiting.
• Ready -- In ready state, the process is waiting to be assigned to processor. The ready processes wait to the processor which is allocated to them by the operating system so that they can run.
• The process come into this state after start state but interrupted by scheduler to assign CPU to other process.
• Waiting -- The process move to waiting state if it needed to be wait for resource, like waiting for file to become available and to wait for user input.