Answering a Question

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Answering a Question

• Direct
• Detailed
• Clear

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Direct

• Answer the question!
• Focus on the specific situation described

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Detailed

• Specific gt General
• Explain yourself always give reasons

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Clear

• Easy to read
• Organized
• Correct English

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Example One

• First system
• A Minicomputer is needed as a database and one
  more Microcomputer may be needed at the counter
  of the library.
• Input
• Bar code reader--- To registry books into
  database.
• Mouse, Keyboard--- For the staff to type
  information into database.
• Output
• Monitor--- To show the information to staff.
• Speaker--- May be used to tell the staff that
  someone has already borrowed limited number
  of book, or its time to return.

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Example Two

• An embedded system (hand taken) can be used in
  system one. It is repeat the information record
  for the visitors. The input devices should
  include few buttons to turning on/off the
  computer, to choose different pieces of
  information or to repeat the same information,
  and to change the volume. The output devices
  should include a screen to show which information
  the visitors is listening and a speaker
  (earphone) for the visitors to listen to the
  information record.

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Common Errors

• OMR/OCR
• Computer size PC, minicomputer, mainframe,
  supercomputer

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Storage
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Two types

• Primary
• Secondary

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Primary Storage

• Inside the computer
• Directly used by the processor

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Primary Storage

• ROM Read Only Memory
• Cant be changed
• Basic instructions when you turn it on
• RAM Random Access Memory
• Only usable when the computer is on
• Stores information being used now

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Secondary Storage

• For saving information long-term
• What kinds of storage do you use?

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Hard Drive

• Stores all software and data
• Large capacity
• Cheap

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Disk Formatting

• To format a disk erases it, and makes it usable
• Formatting assigns blocks, sectors, and tracks

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USB Drive

• Fast access
• Small sizes
• More expensive
• Not smaller per GB
• Limited lifetime

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Solid State HD

• USB drive technology, hard drive size
• Fast
• Low power
• Still expensive
• Still small

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CDs, DVDs

• Cheap
• Portable

• Fragile

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Tape Drive

• Business storage
• Very cheap
• Very slow