Chapter 4 Solution

Discovering Computer 2011 – Living in a Digital World
Page 247-248
Lecturer : Tri Djoko Wahjono


  1. The system unit is a case that contains electronic components of the computer used to process data. (True)
  2. The processor holds data waiting to be processed and instructions waiting to be executed. (False)
  3. The speed of the system clock is just one factor that influences a computer’s performance. (True)
  4. Replacing a motherboard is a fairly complicated process, whereas replacing a processor is much simpler. (True)
  5. A byte is the smallest unit of data the computer can process. (False)
  6. When the computer’s power is turned off, volatile memory loses its contents. (True)
  7. Current processors include advanced transfer cache (ATC), a type of L2 cache built directly on the processor chip. (True)
  8. Read-only memory refers to memory chips storing permanent data and instructions. (True)
  9. Hi-Speed USB is a more advanced and faster USB, with speeds 100 times higher than that of its predecessor. (False)
  10. USB 3.0 is more than 10 times faster than USB 2.0. (False)
  11. Both USB 2.0 and USB 3.0 are backward compatible, which means they do not support older USB devices. (False)
  12. SAS (serial-attached SCSI) is a newer type of SCSI that transmits more reliably, but at slower speeds, than parallel SCSI. (False)

Multiple Choice

  1. B. Central processing unit (CPU)
  2. A. Control unit
  3. B. Registers
  4. B. Massively parallel processing
  5. C. Firmware
  6. B. Port replicator
  7. A. Docking station
  8. D. Front side bus


  1. Motherboard, h. main circuit board of the system unit
  2. Processor, a. interprets and carries out the basic instructions that operate a computer
  3. vPro technology, f. provides the capability to track computer hardware and software, diagnose and resolve computer problems, and secure computers from outside threats
  4. Heat sink, b. small ceramic or metal component with fins on its surface that absorbs and disperses heat produced by electrical components such as a processor
  5. Memory, d. electronic components that store instructions, data, and results of
    processed data
  6. Windows ReadyBoost, e. can allocate available space on removable flash memory devices as additional cache
  7. Flash memory, g. nonvolatile memory that can be erased electronically and rewritten
  8. Access time, c. amount of time it takes the processor to read data, instructions, and information from memory
  9. USB hub, i. device that plugs in a USB port on the system unit and contains multiple USB ports in which you plug cables from USB devices
  10. Backside bus, j. connects the processor to cache

Short Answer

  1. What are two types of designs of Tablet PCs?
    Slate Tablet PC and Convertible Tablet PC
    What are the differences in the designs of the two types of Tablet PCs?
    Slate Tablet PC which typically does not include a keyboard, the system unit is behind the display. On a convertible Tablet PC, by contrast, the system unit is positioned below a keyboard, providing functionality similar to a traditional notebook computer or netbook.
  2. What is the motherboard?
    The motherboard, sometimes called a system board, is the main circuit board of the system unit.
    What is a computer chip?
    A computer chip is a small piece of semiconducting material, usually silicon, on which integrated circuits are etched.
  3. What are the four basic operations in a machine cycle?
    Fetching, Decoding, Executing, and, if necessary, Storing.
    What are some functions of registers?
    Register functions include storing the location from where an instruction was fetched, storing an instruction while the control unit decodes it, storing data while the ALU computes it, and storing the results of a calculation.
  4. What types of devices might be Bluetooth enabled?
    Many computers, peripherals, smart phones, PDAs, cars, and other consumer electronics.
    Describe three ways in which a computer can become Bluetooth enabled.
    Purchase a Bluetooth wireless port adapter that will convert an existing USB port into a Bluetooth port, Also available are Bluetooth PC Cards and ExpressCard modules for traditional notebook computers and Tablet PCs, and Bluetooth cards for smart phones and PDAs.
  5. What is compressed air used for with regards to caring for your computer?
    To removes dust and lint from difficult-to-reach areas; removes sticky liquid spilled on keyboards.
    – How should you prepare for cleaning your computer?

    Before cleaning the exterior of a computer or mobile device, turn it off, and if necessary, unplug it from the electrical outlet, remove its battery, and disconnect all cables from the ports. Use compressed air to blow away dust from any openings on the computer or device case, such as drives, slots, ports, and fan vents. Then, use an antistatic wipe to clean the exterior of the case and a cleaning solution on a soft cloth to clean the screen.
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