Decimal to Hexadecimal (2 marks)
Write the decimal number 175 as a hexadecimal number.
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AQA (8525)
Binary to Decimal (2 marks)
Express the binary number 110101 in decimal.
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Hexadecimal to Binary (1 mark)
Convert the hexadecimal number 5A to its equivalent binary representation.
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Advantages of Using Base 2 (4 marks)
Explain two advantages of using base 2 (binary) in computer processors.
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Application of Hexadecimal (2 marks)
The hexadecimal number ‘1A3’ is used to set colours in web design, where each hex digits (in the group of three) represents red, green, and blue components, respectively. What is the value of the green component in binary?
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Bin to Hex (2 marks)
Convert the binary number 101010 to hexadecimal.
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Why Hexadecimal? (2 marks)
Explain why hexadecimal is often used in computer science to represent binary numbers.
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Test Data Reasons (4 marks)
A program is expected to calculate the volume of a cylinder. The test data should include a radius value of 0 and a height of -1. Justify the choice of these test data values.
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Syntax and Logic Errors (3 marks)
Explain the difference between syntax and logic errors. Provide an example of each.
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