Bus Structures

Bus Structures

Prep Test

  1. The default I/O address for COM1 is

    1. 2F8-2FFh

    2. 3F8-3FFh

    3. 378-37Fh

    4. 3F0-3F7H

  2. The first 32-bit bus was

    1. PCI

    2. EISA

    3. MCA

    4. VESA

  3. A PC has a sound card that locks up whenever the parallel tape backup unit is used on the system. What is the most likely problem?

    1. A DMA channel conflict

    2. An IRQ conflict

    3. The sound card is installed in an incompatible bus slot

    4. There is no system problem other than a defective sound card

  4. To automatically configure a PnP device, a system must have all the following except

    1. A PnP BIOS

    2. PnP hardware devices

    3. A PnP OS

    4. A PCI system bus

  5. COM1 normally uses which IRQ?

    1. IRQ 2

    2. IRQ 3

    3. IRQ 4

    4. IRQ 5

  6. The CPU uses an IRQ to

    1. Control devices attached to the system

    2. Generate a log file containing interrupt requests

    3. Identify a peripheral and find the software that controls it

    4. Protect the system from hardware device failures

  7. What IRQ is often used for LPT1?

    1. IRQ 2

    2. IRQ 10

    3. IRQ 7

    4. IRQ 5

  8. What should you do about an IRQ conflict?

    1. Reassign the device IRQ settings using the best appropriate method

    2. Nothing, if the I/O addresses of the devices aren’t in conflict

    3. Nothing, if the devices are never used at the same time

    4. Always refer to the devices by their logical device names

  9. Bus clock speed refers to

    1. The external speed of the CPU

    2. The internal speed of the CPU

    3. The speed of the hard drive

    4. The speed at which data on the bus moves

  10. A PC Card hard drive fits in which type of slot?

    1. Type I

    2. Type II

    3. Type III

    4. Type IV


  1. B. See “Using input/output (I/O) addresses.”

  2. C. Micro-Channel Architecture was the first 32-bit expansion bus architecture. Review “Plugging into the expansion bus.”

  3. B. When two devices directly affect how the other one works, it’s usually a system resource conflict, and probably an IRQ conflict. Check out “Conflicting interrupts.”

  4. D. PnP devices are available in just about every bus architecture. All PCI devices are PnP, but not all PnP devices are PCI. See “Fun with Plug and Play.”

  5. C. IRQ 4 is the default IRQ assignment for COM1. Review “Assigning IRQs.”

  6. A. Interrupts and IRQs (interrupt requests) are used by the processor to communicate and control the activities of peripheral devices. Look at “Requesting an interrupt, or how to get IRQed.”

  7. C. LPT1 (the first parallel port) is virtually always assigned IRQ 7. See “Assigning IRQs.”

  8. A. IRQ assignments can be made, depending on the device and operating system through a jumper on the card, installation software for the device, or through the operating system (Windows 95). Check out “Conflicting interrupts.”

  9. D. The bus clock controls the transfer rate of data on the data bus. Review “Bus Structure Basics.”

  10. C. Type I PCMCIA (PC Card) cards are used to install RAM; Type II cards are used to install a modem or network card; and Type III cards are used to install disk drives. Take a look at “Upgrading notebooks and portables.”

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