I/O interface: (a) Consider the following I/O scenarios on a single-user PC: i. A mouse used with a graphical user interface ii. A disk drive containing user files iii. A graphics card with direct memory bus connection, accessible via memory-mapped I/O For each of these I/O scenarios, would you use polled I/O or interrupt-driven I/O? Would you design the operating system to use buffering, spooling, caching, or a combination? (b) The operating system normally performs resource accounting in order to determine, for instance, the amount of CPU time that a process has already consumed for scheduling purposes. Discuss why interrupts and execution in kernel mode could complicate this process. (Question: Operating System)

Q: What happens to the CPU when a software requests input/output (I/O)? How is it communicated to the…

A: Answer:

Q: This

A: What is Virtual: In computing, virtual refers to a simulated or abstract representation of…

Q: Name 2 common hardware pieces in a computer that we cannot virtualize

A: The virtual program or machine will always run in a layer on the system by which it has been hosted,…

Q: Memory may be accessed in two ways: sequentially and directly. Which of today's most commonly used…

A: INTRODUCTION: MEMORY: Memory refers to how information is acquired, stored, retained, and later…

Q: An action that results in the allocation of a demand-free memory area would only be requested by a…

A: An action that results in the allocation of a demand-free memory area would only be requested by a…

Q: Specify the workings of virtual memory.

A: Operating systems employ virtual memory as a method of managing physical memory. It enables the…

Q: Why are spinlocks used as a synchronisation method only on multiprocessor systems and not on single…

A: Solaris, Linux, and Windows 2000 use spinlocks as a synchronization mechanism only on multiprocessor…

Q: Make sure you know the difference between random access memory (RAM) and dynamic random access…

A: Answer:

Q: Describe six different sources of software.

A: There are the following six sources of software: 1. Information technology services firms:2.…

Q: What happens to the CPU when a software requests input/output (I/O)? How is it communicated to the…

A: I/O Request: I/O requests for parcels are structures used in kernel mode for communication between…

Q: Question 9: A mouse generates an interrupt whenever the position changes by 0.1 mm. How much ti does…

A: Given mouse moves 30 cm/sec.

Q: Make sure you know the difference between random access memory (RAM) and dynamic random access…

A: SRAM DRAM Maintains information as long as power is present.  Saves information as long as power…

Fundamentals of Input and Output Performance

The I/O subsystem is a component of computer system design that uses buses to assist communication between the Central Processing Unit, Computer Memory/Storage, and Input and Output Devices (that is known as peripheral devices). The I/O subsystem includes disc controllers, tape drives, discs, system buses, and other devices. The I/O database application reads and writes drives using the operating system windows I/O.