1a
4 marks
4 marksA school network has several computers.
Each computer in the network has a media access control (MAC) address.
Hexadecimal is used for MAC addresses.
Part of a MAC address is given.
97–5C–E1
Each pair of digits is stored as binary in an 8-bit register.
a)
Complete the binary register for these two pairs of digits.
| 97 |
| 5C |
[4]
1b2 marks
2 marksb)
Give two other uses of hexadecimal in computer science.
1 ..................................................................
2 ...................................................................
1 ..................................................................
2 ...................................................................
[2]
1c2 marks
2 marksc)
Another value is stored as binary in a register.
| 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
i)
A logical left shift of two places is performed on the binary value.
Complete the binary register to show its contents after this logical left shift.
Complete the binary register to show its contents after this logical left shift.
[1]
ii)
State one effect this logical shift has on the binary value.
[1]
1d2 marks
2 marksd)
Negative denary numbers can also be represented as binary using two’s complement.
Complete the binary register for the denary value −54.
You must show all your working.
Working space ...........................................
Complete the binary register for the denary value −54.
You must show all your working.
Working space ...........................................
| Register: |
[2]
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