Understanding the Components of Hard Disk Drives
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Questions and Answers

When were hard disk drives first introduced?

  • 1956 (correct)
  • 1972
  • 1980
  • 1966
  • What is the main function of the platters in a hard disk drive?

  • Controlling the spin of the platters
  • Mounting the hard disk in a horizontal or vertical position
  • Positioning the read/write heads
  • Storing data on a stack of discs (correct)
  • What is the size of the first IBM drive, the 350 RAMAC?

  • Size of two refrigerators (correct)
  • Size of a car
  • Size of a laptop
  • Size of a television
  • Which component of the hard drive contains the electromagnetic read/write heads?

    <p>Platters (C)</p> Signup and view all the answers

    What is the main purpose of the hard disk logic board?

    <p>Connecting the hard drive to the computer (A)</p> Signup and view all the answers

    Binary fission is the process that bacteria use to carry out cell ______

    <p>division</p> Signup and view all the answers

    A unit used to estimate the number of viable microbial cells is colony forming unit (CFU), which stands for ______

    <p>colony forming unit</p> Signup and view all the answers

    The time it takes for a population of bacteria to double in number is called the ______ time

    <p>generation</p> Signup and view all the answers

    A pure culture contains only one species or ______

    <p>strain</p> Signup and view all the answers

    Examples of bacterial generation times include E. Coli with a generation time of 20 to 21 minutes in optimum conditions, Streptococcus lactis with a generation time of 48 minutes in optimum conditions, and Mycobacterium tuberculosis with a generation time of about 792 minutes in optimum conditions. The generation time depends upon factors such as the nutrient in the medium and physical conditions like ______ and temperature

    <p>pH</p> Signup and view all the answers

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