Data Sizes in Computer Science
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Questions and Answers

What is the basic unit of information in computing?

  • A bit (correct)
  • A byte
  • A kilobyte
  • A megabyte
  • How many bits are in a byte?

  • 16 bits
  • 4 bits
  • 32 bits
  • 8 bits (correct)
  • What is the approximate number of bytes in a kilobyte?

  • 500 bytes
  • 1,000 bytes
  • 1,024 bytes (correct)
  • 100 bytes
  • How many megabytes are in a gigabyte?

    <p>1,024 MB</p> Signup and view all the answers

    How many bytes are in a terabyte?

    <p>1 trillion bytes</p> Signup and view all the answers

    What is the primary difference between a bit and a byte?

    <p>A bit is a single binary digit, while a byte is a group of 8 bits</p> Signup and view all the answers

    How many kilobytes are in a single megabyte?

    <p>1,024 kilobytes are in a megabyte</p> Signup and view all the answers

    What is the approximate storage capacity of a typical CD?

    <p>650-700 MB</p> Signup and view all the answers

    Which of the following is NOT true about a gigabyte?

    <p>A gigabyte is a common size for a CD</p> Signup and view all the answers

    What is the approximate file size of a high-resolution image?

    <p>1-5 MB</p> Signup and view all the answers

    Study Notes

    Data Sizes in Computer Science

    Bit vs Byte

    • A bit is the basic unit of information in computing and represents a single binary digit (0 or 1).
    • A byte is a group of 8 bits that can represent a character, number, or other type of data.
    • 1 byte = 8 bits

    Data Sizes: Kilobyte to Gigabyte

    • Kilobyte (KB): 1 KB = 1,024 bytes (approx. 1 thousand bytes)
    • Megabyte (MB): 1 MB = 1,024 KB (approx. 1 million bytes)
    • Gigabyte (GB): 1 GB = 1,024 MB (approx. 1 billion bytes)
    • Terabyte (TB): 1 TB = 1,024 GB (approx. 1 trillion bytes)

    Key Conversions:

    • 1 KB = 1,024 bytes
    • 1 MB = 1,024 KB = 1,048,576 bytes
    • 1 GB = 1,024 MB = 1,073,741,824 bytes

    Bits and Bytes

    • A bit is the basic unit of information in computing, representing a single binary digit (0 or 1).
    • A byte is a group of 8 bits that can represent a character, number, or other type of data.
    • 1 byte is equal to 8 bits.

    Data Sizes

    • A kilobyte (KB) is a unit of measurement that equals 1,024 bytes (approximately 1 thousand bytes).
    • A megabyte (MB) is a unit of measurement that equals 1,024 kilobytes (approximately 1 million bytes).
    • A gigabyte (GB) is a unit of measurement that equals 1,024 megabytes (approximately 1 billion bytes).
    • A terabyte (TB) is a unit of measurement that equals 1,024 gigabytes (approximately 1 trillion bytes).

    Key Conversions

    • 1 kilobyte (KB) equals 1,024 bytes.
    • 1 megabyte (MB) equals 1,024 kilobytes, or 1,048,576 bytes.
    • 1 gigabyte (GB) equals 1,024 megabytes, or 1,073,741,824 bytes.

    Data Sizes

    • Bit: The basic unit of information in computing, representing a single binary digit (0 or 1)
    • Byte: A group of 8 bits, used to represent a single character or number

    Data Measurement Units

    • Kilobyte (KB): 1,024 bytes
    • Megabyte (MB): 1,024 kilobytes (1,048,576 bytes)
    • Gigabyte (GB): 1,024 megabytes (1,073,741,824 bytes)
    • Terabyte (TB): 1,024 gigabytes (1,099,511,627,776 bytes)

    Notable Conversions

    • 1 Megabyte (MB) is equal to 1,024 Kilobytes (KB)
    • 1 Gigabyte (GB) is equal to 1,024 Megabytes (MB)
    • 1 Terabyte (TB) is equal to 1,024 Gigabytes (GB)

    Common Data Sizes

    • A typical text document is usually between 1-10 Kilobytes (KB)
    • A high-resolution image is usually between 1-5 Megabytes (MB)
    • A CD storage capacity is around 650-700 Megabytes (MB)
    • A DVD storage capacity is around 4.7 Gigabytes (GB)

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    Description

    Learn about the basics of data sizes in computing, including bits, bytes, kilobytes, megabytes, and gigabytes. Understand the conversion between each unit.

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