1.2.3 Units

• What is the smallest unit of data in computing?

  Bit
• How many bits are in a nibble?

  4 bits
• How many bits are in a byte?

  8 bits
• How many bytes are in a kilobyte?

  1,000 bytes
• How many kilobytes are in a megabyte?

  1,000 KB
• How many megabytes are in a gigabyte?

  1,000 MB
• How many gigabytes are in a terabyte?

  1,000 GB
• How many terabytes are in a petabyte?

  1,000 TB
• Why does data need to be converted into binary format for processing by a computer?

  Because computers operate using transistors that recognize only two states.
• What are the two values that transistors in computers can represent?

  On or off (1 or 0)
• How does a circuit determine the state of electricity flow?

  By checking if electricity is flowing or not flowing.
• How do the concepts of on/off and 1/0 relate to the functioning of a computer?

  They represent the binary system that computers use to process data.
• If a computer uses a circuit that checks for two states, what values can it process?

  1 and 0
• What are the units of data from smallest to largest?

  • Bit
  • Nibble (4 bits)
  • Byte (8 bits)
  • Kilobyte (1,000 bytes)
  • Megabyte (1,000 KB)
  • Gigabyte (1,000 MB)
  • Terabyte (1,000 GB)
  • Petabyte (1,000 TB)
• What is the role of transistors in a computer?

  • Act as switches
  • Represent binary values (1 or 0)
  • Enable processing of data