Hexadecimal to Denary Conversion Quiz
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Questions and Answers

What does the hexadecimal color code '#00FF00' represent?

  • Green (correct)
  • Blue
  • Orange
  • Fuchsia

    • How many possible colors can be represented using the RGB color model with hexadecimal values?

  • 256
  • 16777216 (correct)
  • 65536
  • 1024

    • Which hexadecimal color code represents the color orange?

  • #FFA500
  • #FF8000 (correct)
  • #FF4040
  • #99FF00

    • What does the '#FF00FF' hexadecimal color code indicate?

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

    Which of the following color codes indicates the primary color blue?

    <p>#0000FF</p> Signup and view all the answers

    What is the first step in converting the hexadecimal number 4 5 A into denary?

    <p>Multiply each hex digit by its heading value.</p> Signup and view all the answers

    What does the hexadecimal digit A represent in denary?

    <p>10</p> Signup and view all the answers

    If you were to convert the hexadecimal number C 8 F into denary, what is the value of the hex digit C?

    <p>12</p> Signup and view all the answers

    What is the last step in converting a hexadecimal number to a denary number?

    <p>Add all the results together.</p> Signup and view all the answers

    In the conversion of the hexadecimal number 4 5 A, what is the value of the total after multiplying all digits?

    <p>1114</p> Signup and view all the answers

    What would be the RGB representation for the values Red = 53, Green = 55, and Blue = 139?

    <p>RGB(53, 55, 139)</p> Signup and view all the answers

    Which hexadecimal value corresponds to the RGB color combination Red = 201, Green = 122, Blue = 204?

    <p>C97ACC</p> Signup and view all the answers

    When adding the binary numbers 11010011 and 10110101, what is the correct binary result?

    <p>110101000</p> Signup and view all the answers

    What decimal value corresponds to the RGB color combination Red = 12, Green = 111, Blue = 81?

    <p>1233</p> Signup and view all the answers

    Which of the following statements is true regarding the conversion of denary to hexadecimal?

    <p>Each digit in hexadecimal represents a value from 0 to 15.</p> Signup and view all the answers

    What is one of the main advantages of using hexadecimal numbers?

    <p>They are easier for humans to remember and work with.</p> Signup and view all the answers

    In the context of error codes, what do hexadecimal values typically represent?

    <p>Memory locations of the error.</p> Signup and view all the answers

    Which of the following is a use of hexadecimal numbering?

    <p>Media Access Control (MAC) addresses.</p> Signup and view all the answers

    What do programmers need to interpret when dealing with error codes?

    <p>The hexadecimal error codes generated by the system.</p> Signup and view all the answers

    What is the purpose of memory dumps in program development?

    <p>To provide a snapshot of the memory contents.</p> Signup and view all the answers

    Hexadecimal color codes are primarily used in which of the following?

    <p>Website design and development.</p> Signup and view all the answers

    Which statement accurately describes a MAC address?

    <p>It uniquely identifies a device on a network.</p> Signup and view all the answers

    What makes hexadecimal representation more useful in computing?

    <p>It simplifies the representation of binary data.</p> Signup and view all the answers

    What is the correct website to visit for purchasing the Cambridge IGCSE™ and O Level Computer Science Teacher's Guide?

    <p><a href="http://www.hoddereducation.com/cambridge-igcse-computerscience">www.hoddereducation.com/cambridge-igcse-computerscience</a></p> Signup and view all the answers

    Who are the authors of the Cambridge IGCSE™ and O Level Computer Science Teacher's Guide?

    <p>David Watson and Helen Williams</p> Signup and view all the answers

    What type of material does Cambridge Assessment International Education reproduce under license?

    <p>Copyright material</p> Signup and view all the answers

    Which statement is true regarding the example answers in the publication?

    <p>They are authored by the authors of the guide.</p> Signup and view all the answers

    What does Cambridge Assessment International Education not endorse?

    <p>Third-party websites and resources</p> Signup and view all the answers

    What rights does Cambridge International retain for content in the publication?

    <p>They are the sole owners of the intellectual property</p> Signup and view all the answers

    What should users be aware of regarding the way marks are awarded in examinations?

    <p>They may differ from the guidance in the publication.</p> Signup and view all the answers

    What is the publication's stance on the material used for acknowledgements?

    <p>It thanks contributors for permission to reproduce materials.</p> Signup and view all the answers

    Which statement accurately describes the denary number system?

    <p>It uses ten separate digits to represent values.</p> Signup and view all the answers

    What is the base of the binary number system?

    <p>Base 2</p> Signup and view all the answers

    How many values can the binary system represent?

    <p>Two unique values.</p> Signup and view all the answers

    What is the value of the binary number 1101 in denary?

    <p>13</p> Signup and view all the answers

    What is the highest decimal (denary) value represented by an 8-digit binary number?

    <p>255</p> Signup and view all the answers

    Which of the following correctly lists the binary headings for an 8-digit binary number?

    <p>128, 64, 32, 16, 8, 4, 2, 1</p> Signup and view all the answers

    When converting a binary number to denary, what do you do with each column value that has a 1?

    <p>Add it to the total.</p> Signup and view all the answers

    If the binary number is 10101010, what is the total when converting it to denary?

    <p>170</p> Signup and view all the answers

    Study Notes

    Converting Hexadecimal to Denary

    • To convert a hexadecimal number to denary, multiply each hexadecimal digit by its corresponding heading value (e.g., 256, 16, 1).
    • Hexadecimal digits A-F represent the values 10-15 respectively.
    • Add all the resultant totals to get the denary equivalent.

    Examples

    • Example 1: Converting 45A to denary

      • 4 * 256 = 1024
      • 5 * 16 = 80
      • 10 * 1 = 10 (A represents 10)
      • 1024 + 80 + 10 = 1114 (Denary equivalent)

    • Example 2: Converting C8F to denary

      • (This example is similar to example 1, and follows the same procedure.)

    Uses of Hexadecimal

    • Error Codes: Often used to represent memory location of errors in computer systems.
    • MAC Addresses: Unique identifiers for devices on a network.
    • IPv6 Addresses: Used in internet protocol addressing.
    • HTML Colour Codes: Used to specify colours in HTML.

    HTML Colour Codes

    • HTML color codes use six hexadecimal digits to define RGB (Red, Green, Blue) components.
    • The '#' symbol precedes the hexadecimal code.
    • Each digit represents the intensity of Red, Green, and Blue (256 possible values per color).

    RGB to Hexadecimal Conversion (Example)

    • Activity requires converting denary RGB values to hexadecimal.

    Binary Numbers

    • The binary system is a base-2 number system using only 0s and 1s.
    • Binary numbers have headings like 1, 2, 4, 8, 16, etc.

    Converting Binary to Denary

    • Sum the column values (headings) where the binary digit is 1.

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    Related Documents

    Cambridge IGCSE & O Level Computer Science Second Edition PDF

    Description

    Test your knowledge on converting hexadecimal numbers to their denary equivalents. This quiz includes examples and practical applications of hexadecimal in computer systems, such as error codes and HTML color codes. Brush up on your skills and see how well you understand this important number system!

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