OCR SUMMER 2026
PREDICTED PAPER
GCSE
Computer Science
J277/01: Computer systems
Mark Scheme
.
for more: tyrionpapers.com
, Question Answer Marks
1(a) FFF 1
1(b) 4095 1
1(c) 0100 0010 1001 2
0001 1010 0011
1(d) 8A1 2
70B
1(e)(i) Microprocessor 1
1(e)(ii) A 1
1(e)(iii) Light 1
1(e)(iv) Any four from: 4
• The disk is spun
• A laser is shone onto the disk
• Pits are burnt into the disk
• Pits are in a (spiral) track
• Pits and lands represent binary values
for more: tyrionpapers.com
PREDICTED PAPER
GCSE
Computer Science
J277/01: Computer systems
Mark Scheme
.
for more: tyrionpapers.com
, Question Answer Marks
1(a) FFF 1
1(b) 4095 1
1(c) 0100 0010 1001 2
0001 1010 0011
1(d) 8A1 2
70B
1(e)(i) Microprocessor 1
1(e)(ii) A 1
1(e)(iii) Light 1
1(e)(iv) Any four from: 4
• The disk is spun
• A laser is shone onto the disk
• Pits are burnt into the disk
• Pits are in a (spiral) track
• Pits and lands represent binary values
for more: tyrionpapers.com
