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Questions and Answers
What does the hexadecimal color code '#00FF00' represent?
What does the hexadecimal color code '#00FF00' represent?
How many possible colors can be represented using the RGB color model with hexadecimal values?
How many possible colors can be represented using the RGB color model with hexadecimal values?
Which hexadecimal color code represents the color orange?
Which hexadecimal color code represents the color orange?
What does the '#FF00FF' hexadecimal color code indicate?
What does the '#FF00FF' hexadecimal color code indicate?
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Which of the following color codes indicates the primary color blue?
Which of the following color codes indicates the primary color blue?
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What is the first step in converting the hexadecimal number 4 5 A into denary?
What is the first step in converting the hexadecimal number 4 5 A into denary?
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What does the hexadecimal digit A represent in denary?
What does the hexadecimal digit A represent in denary?
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If you were to convert the hexadecimal number C 8 F into denary, what is the value of the hex digit C?
If you were to convert the hexadecimal number C 8 F into denary, what is the value of the hex digit C?
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What is the last step in converting a hexadecimal number to a denary number?
What is the last step in converting a hexadecimal number to a denary number?
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In the conversion of the hexadecimal number 4 5 A, what is the value of the total after multiplying all digits?
In the conversion of the hexadecimal number 4 5 A, what is the value of the total after multiplying all digits?
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What would be the RGB representation for the values Red = 53, Green = 55, and Blue = 139?
What would be the RGB representation for the values Red = 53, Green = 55, and Blue = 139?
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Which hexadecimal value corresponds to the RGB color combination Red = 201, Green = 122, Blue = 204?
Which hexadecimal value corresponds to the RGB color combination Red = 201, Green = 122, Blue = 204?
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When adding the binary numbers 11010011 and 10110101, what is the correct binary result?
When adding the binary numbers 11010011 and 10110101, what is the correct binary result?
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What decimal value corresponds to the RGB color combination Red = 12, Green = 111, Blue = 81?
What decimal value corresponds to the RGB color combination Red = 12, Green = 111, Blue = 81?
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Which of the following statements is true regarding the conversion of denary to hexadecimal?
Which of the following statements is true regarding the conversion of denary to hexadecimal?
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What is one of the main advantages of using hexadecimal numbers?
What is one of the main advantages of using hexadecimal numbers?
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In the context of error codes, what do hexadecimal values typically represent?
In the context of error codes, what do hexadecimal values typically represent?
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Which of the following is a use of hexadecimal numbering?
Which of the following is a use of hexadecimal numbering?
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What do programmers need to interpret when dealing with error codes?
What do programmers need to interpret when dealing with error codes?
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What is the purpose of memory dumps in program development?
What is the purpose of memory dumps in program development?
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Hexadecimal color codes are primarily used in which of the following?
Hexadecimal color codes are primarily used in which of the following?
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Which statement accurately describes a MAC address?
Which statement accurately describes a MAC address?
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What makes hexadecimal representation more useful in computing?
What makes hexadecimal representation more useful in computing?
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What is the correct website to visit for purchasing the Cambridge IGCSE™ and O Level Computer Science Teacher's Guide?
What is the correct website to visit for purchasing the Cambridge IGCSE™ and O Level Computer Science Teacher's Guide?
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Who are the authors of the Cambridge IGCSE™ and O Level Computer Science Teacher's Guide?
Who are the authors of the Cambridge IGCSE™ and O Level Computer Science Teacher's Guide?
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What type of material does Cambridge Assessment International Education reproduce under license?
What type of material does Cambridge Assessment International Education reproduce under license?
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Which statement is true regarding the example answers in the publication?
Which statement is true regarding the example answers in the publication?
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What does Cambridge Assessment International Education not endorse?
What does Cambridge Assessment International Education not endorse?
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What rights does Cambridge International retain for content in the publication?
What rights does Cambridge International retain for content in the publication?
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What should users be aware of regarding the way marks are awarded in examinations?
What should users be aware of regarding the way marks are awarded in examinations?
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What is the publication's stance on the material used for acknowledgements?
What is the publication's stance on the material used for acknowledgements?
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Which statement accurately describes the denary number system?
Which statement accurately describes the denary number system?
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What is the base of the binary number system?
What is the base of the binary number system?
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How many values can the binary system represent?
How many values can the binary system represent?
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What is the value of the binary number 1101 in denary?
What is the value of the binary number 1101 in denary?
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What is the highest decimal (denary) value represented by an 8-digit binary number?
What is the highest decimal (denary) value represented by an 8-digit binary number?
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Which of the following correctly lists the binary headings for an 8-digit binary number?
Which of the following correctly lists the binary headings for an 8-digit binary number?
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When converting a binary number to denary, what do you do with each column value that has a 1?
When converting a binary number to denary, what do you do with each column value that has a 1?
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If the binary number is 10101010, what is the total when converting it to denary?
If the binary number is 10101010, what is the total when converting it to denary?
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Flashcards
Converting Hex to Denary
Converting Hex to Denary
The process of changing a hexadecimal number into a decimal (denary) number.
Hexadecimal Digits
Hexadecimal Digits
The digits 0-9 and A-F used in hexadecimal numbers. A-F represent values 10-15 in denary.
Heading Values
Heading Values
The powers of 16 that each hex digit is multiplied by. Example: 256, 16, 1.
Example 1 - Denary Conversion
Example 1 - Denary Conversion
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Example 2 - Denary Conversion
Example 2 - Denary Conversion
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HTML Hex Color Code
HTML Hex Color Code
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Hexadecimal Code Structure
Hexadecimal Code Structure
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Color Components (RGB)
Color Components (RGB)
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Possible Colors (HTML)
Possible Colors (HTML)
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Hexadecimal Representation
Hexadecimal Representation
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Hexadecimal
Hexadecimal
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Error Codes (hex)
Error Codes (hex)
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MAC Address
MAC Address
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Memory Dump
Memory Dump
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Hexadecimal Error Codes
Hexadecimal Error Codes
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Base 16
Base 16
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Network Device
Network Device
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Unique Device Identifier
Unique Device Identifier
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RGB Denary Value
RGB Denary Value
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Hexadecimal Conversion
Hexadecimal Conversion
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8-bit Binary Addition
8-bit Binary Addition
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Binary Digit
Binary Digit
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Adding Binary Numbers
Adding Binary Numbers
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Denary System
Denary System
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Binary System
Binary System
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Binary to Denary Conversion
Binary to Denary Conversion
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Binary Headings
Binary Headings
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What are the 10 digits in Denary system?
What are the 10 digits in Denary system?
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What are the digits in Binary System?
What are the digits in Binary System?
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Base of a number system
Base of a number system
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Place Value
Place Value
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Hexadecimal Number System
Hexadecimal Number System
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Hexadecimal to Denary Conversion
Hexadecimal to Denary Conversion
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HTML Color Codes
HTML Color Codes
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Color Intensity in Hex Codes
Color Intensity in Hex Codes
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RGB Color Model
RGB Color Model
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Possible HTML Colors
Possible HTML Colors
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Hexadecimal Representation in HTML
Hexadecimal Representation in HTML
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Understanding Hexadecimal for Web Development
Understanding Hexadecimal for Web Development
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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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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!