Computer Organization and Architecture: Chapter 7 (Input/Output Systems) Exam Quiz
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Questions and Answers

What is the primary function of a disk controller in a computer system?

  • To control the movement of read/write heads and data transfer between the disk and system bus (correct)
  • To manage the flow of data between the CPU and memory
  • To provide a buffer for data transfer between the disk and memory
  • To perform error correction and data encryption on data stored on the disk

    • What is the purpose of a track buffer in a disk drive?

  • To provide a secondary storage location for data
  • To cache frequently accessed data from the disk
  • To store data temporarily while it is being transferred from the disk to memory
  • To hold the current track location and sector data (correct)

    • Which of the following is a characteristic of a sequential access device?

  • Data is accessed directly using a unique address
  • Data is accessed in a continuous sequence of bytes (correct)
  • Data is accessed using a directory or index
  • Data is accessed randomly using a track and sector number

    • What is the purpose of a sector translator in a disk drive?

    <p>To translate logical sector addresses to physical sector addresses (B)</p> Signup and view all the answers

    What is the primary advantage of using a RAID 5 configuration?

    <p>Improved data reliability and fault tolerance (C)</p> Signup and view all the answers

    What is the primary reason for using interleaving in a multitrack disk?

    <p>To improve the transfer rate by reducing the latency between sectors (B)</p> Signup and view all the answers

    What is the main difference between a hard disk and a floppy disk?

    <p>The thickness of the disk (A)</p> Signup and view all the answers

    What is the primary function of a DMA controller in a computer system?

    <p>To manage the transfer of data between devices (C)</p> Signup and view all the answers

    Which of the following I/O devices is most likely to use a FIFO buffer?

    <p>Printer (B)</p> Signup and view all the answers

    What is the primary advantage of using a switched I/O architecture?

    <p>It increases the flexibility of I/O device connections (B)</p> Signup and view all the answers

    Study Notes

    Here are the study notes for Chapter 7: Input/Output Systems:

    I/O Systems

    • I/O systems consist of devices, interfaces, and controllers that allow data to be transferred between the computer and the outside world
    • I/O operations involve data transfer between devices and memory, and may be performed using either programmed I/O or interrupt-driven I/O

    Programmed I/O

    • In programmed I/O, the CPU executes a sequence of instructions to perform I/O operations
    • The CPU repeatedly checks the status of the device and waits until the device is ready for data transfer
    • Programmed I/O is used for low-speed devices, such as keyboards and displays

    Interrupt-Driven I/O

    • Interrupt-driven I/O allows the CPU to continue executing instructions while I/O operations are being performed
    • When a device is ready for data transfer, it generates an interrupt signal to the CPU
    • The CPU temporarily suspends its current operation and executes a specialized routine called an interrupt handler

    I/O Interface

    • An I/O interface is a set of circuits and logic that connect devices to the computer
    • I/O interfaces can be either parallel or serial

    Parallel Interface

    • In a parallel interface, multiple bits are transmitted simultaneously over separate wires
    • Parallel interfaces are used for high-speed devices, such as printers and disks

    Serial Interface

    • In a serial interface, bits are transmitted one at a time over a single wire
    • Serial interfaces are used for low-speed devices, such as keyboards and mice

    I/O Controllers

    • I/O controllers are specialized chips that manage the flow of data between devices and memory
    • I/O controllers can be either dedicated controllers or general-purpose processors

    Direct Memory Access (DMA)

    • DMA allows devices to directly access memory without involving the CPU
    • DMA is used for high-speed devices, such as disks and tapes

    I/O Channels

    • I/O channels are dedicated paths for data transfer between devices and memory
    • I/O channels can be either multiplexed or demultiplexed

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    Description

    Test your knowledge of input/output systems in computer architecture with this quiz, covering topics from Chapter 7 of the Essentials of Computer Organization and Architecture, Sixth Edition textbook. Questions will challenge your understanding of I/O interfaces, input/output operations, and storage devices. Are you ready?

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