A level computer science exam question OCR

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WingsDan
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#1
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#1
"A computer uses a Von Neumann processor.
RISC and CISC are types of processor architecture.
Describe the differences between the two architectures."
Mark scheme: CISC is more complex / RISC is
simpler / CISC longer instruction set
RISC requires more RAM
CISC many address modes
CISC may have more registers
RISC takes one machine cycle / CISC
takes many cycles to complete one
instruction
RISC fixed number of bytes / CISC
variable number
my answer: CISC has a compicated processor design, whilst RISC has a simple processor design. CISC has many instructions available whilst RISC has a limited instruction available.

This question is 4 marks, so would I need 4 comparisions, or just 2 (like my answer)??? Also, my comparison points are not included in the markscheme, so would I still get the marks as CISC does have different designs and varied instructions..Thanks
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TSR Jessica
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#2
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#2
Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.
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Ranger33
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#3
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#3
(Original post by WingsDan)
"A computer uses a Von Neumann processor.
RISC and CISC are types of processor architecture.
Describe the differences between the two architectures."
Mark scheme: CISC is more complex / RISC is
simpler / CISC longer instruction set
RISC requires more RAM
CISC many address modes
CISC may have more registers
RISC takes one machine cycle / CISC
takes many cycles to complete one
instruction
RISC fixed number of bytes / CISC
variable number
my answer: CISC has a compicated processor design, whilst RISC has a simple processor design. CISC has many instructions available whilst RISC has a limited instruction available.

This question is 4 marks, so would I need 4 comparisions, or just 2 (like my answer)??? Also, my comparison points are not included in the markscheme, so would I still get the marks as CISC does have different designs and varied instructions..Thanks
It's pretty simple. You would get the marks depending on the context in which it is used in
Last edited by Ranger33; 1 year ago
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WingsDan
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#4
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#4
(Original post by Ranger33)
It's pretty simple. You would get the marks depending on the context in which it is used in
But how would I get the 4 marks? How many comparisons do I have to make?
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Ranger33
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#5
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(Original post by WingsDan)
But how would I get the 4 marks? How many comparisons do I have to make?
I'd say 2 comparisons and explain the reasoning behind why you chose those two, which will gain you the further 2 marks
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WingsDan
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#6
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#6
(Original post by Ranger33)
I'd say 2 comparisons and explain the reasoning behind why you chose those two, which will gain you the further 2 mark
Oh, can you please provide an example (in terms of the reasoning with why the 2 comparisons are chosen), expanding from my answer: "CISC has a compicated processor design, whilst RISC has a simple processor design. CISC has many instructions available whilst RISC has a limited instruction available."
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