Advanced level 2023 south west regional mock computer science guide
Advanced level 2023 south west regional mock computer science guide
| 1 | C | 11 | B | 21 | A | 31 | B | 41 | C |
| 2 | B | 12 | B | 22 | B | 32 | C | 42 | B |
| 3 | D | 13 | B | 23 | B | 33 | B | 43 | A |
| 4 | B | 14 | C | 24 | B | 34 | C | 44 | C |
| 5 | D | 15 | C | 25 | D | 35 | A | 45 | C |
| 6 | A | 16 | C | 26 | C | 36 | B | 46 | C |
| 7 | A | 17 | C | 27 | D | 37 | B | 47 | A |
| 8 | C | 18 | D | 28 | B | 38 | D | 48 | B |
| 9 | A | 19 | A | 29 | A | 39 | A | 49 | D |
| 10 | D | 20 | D | 30 | C | 40 | D | 50 | A |
Answer: 10110110= B516
(d)- Hex numbers take up less screen space.
– Hex numbers are easier and faster to read and work with
– Mistakes are less likely and easier to trace/debug.
(ii) (a) ( ) = ) = =
(b)
(c) Reduced number of gates:
– reduces power consumption
– reduces the heat generated by the chip
– increases the speed
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2. (i) (a) The size of the data bus is 32 bits
The number of address line is 29x220=229 = 29 address lines
(b) Number of chips = = 6
