A-LevelComputer ScienceData representation9618/12 · Oct/Nov 2025 · Q74 Marks
The following binary addition is performed using 8-bit registers. Complete the calculation using binary addition. 10000111 +00111001
- (a)The following binary addition is performed using 8-bit registers. Complete the calculation using binary addition. 10000111 +00111001[1]
- (b)A computer uses the Unicode character set. State the number of bits used to store one character from the Unicode character set.[1]
- (c)(i)ASCII is another character set. The ASCII value for the character 'h' has the denary value 104. Write the Binary Coded Decimal (BCD) value for the ASCII character 'h'.[1]
- (c)(ii)Write the hexadecimal value for the ASCII character 'h'.[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2025). The mark or mark type is shown in brackets.
- 7(a) 1 mark for the correct answer
- 1100 0000
- 7(b) 1 mark for the correct answer
- 8 // 16 // 32 // 64
- 7(c)(i) 1 mark for the correct answer
- 0001 0000 0100
- 7(c)(ii) 1 mark for the correct answer
- 68
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