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Edexcel 9-1 GCSE Computer Science Paper 1 Monday 14th May 2018 Unofficial Mark Scheme

Just completed the exam want to say it went well but I shouldn't be to optimistic.

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Was easy I guess but I am not expecting a 9 anymore. Last question was hard (probably scrapped 2 marks, 3 marks if I am lucky) and I missed the question with the special condition that can be handled by Caesar cipher. Some of my answers were pretty vague also. I probably lost 10-15 marks in the paper.

Reply 2

username3963576

Also I was not sure how to fully answer the 24 bit depth question. I explained that approximately 16 million colours could be used and that was it.

Reply 3

username3963576

1. 300 x 200= 60000 Pixels
2. 24 Colour bit depth gives approximately 16 million colours.
3.

(edited 5 years ago)

Reply 4

CompSciMaster

It was 200x300, and is it a problem if you didn’t write pixels after it?

Reply 5

username3963576

Original post by CompSciMaster

It was 200x300, and is it a problem if you didn’t write pixels after it?

I'm not sure it was 1 mark

Reply 6

Varss

Yeah it was only one mark and 200*300 is right

Reply 7

Shailen2064

Give 4 features of a compiler
What are two of the things that are stored in the main memory according to the Von Neuman model

Reply 8

CompSciMaster

Original post by Shailen2064

Give 4 features of a compiler
What are two of the things that are stored in the main memory according to the Von Neuman model

1. Compiles everything in one go
2. Only returns error after whole thing is compiled
3. Turns source code into machine code after which no compiler or source code is needed
4. Not sure -

1. Data
2. Programs

(edited 5 years ago)

Reply 9

Bros4lyf

Guys What about Embedded systems? How they work in head lights of a vehicle?

Reply 10

Bros4lyf

3 advantages of wireless over wired connections

Reply 11

Bros4lyf

How does router work? (5 marker)

Reply 12

anaby01

Best case, worst case of binary search algorithm (2 marks)
Describe Penetration testing (2 marks)
Describe two ways in which the improper disposal of digital devices can have harmful effect on human health (4 marks)
Why are devices connected on a network (2 marks)

Reply 13

Varss

Embedded systems one - monitors light levels and turns on headlights when it's dark and turns them off when there is sufficient light

Reply 14

lorddemaxus

Original post by Varss

Embedded systems one - monitors light levels and turns on headlights when it's dark and turns them off when there is sufficient light

Is that a 3 mark answer? I put that either the user can press a button or it turns on after a certain time (I put 6 pm).

Reply 15

username3723410

Paper went well. Just last question was very weird didn’t cover it in class or anything.

Reply 16

beffmcleff

Can someone remind me of what the last question was again?

Also, according to Wikipedia https://en.wikipedia.org/wiki/Web_colors, the answer to the hexadecimal colour conversion one is 5F 9E A0, which is good since I believe I got that if memory serves.

(edited 5 years ago)

Reply 17

anaby01

Original post by lorddemaxus

Is that a 3 mark answer? I put that either the user can press a button or it turns on after a certain time (I put 6 pm).

The question didn't specify if the headlights turn on/off automatically or manually so I don't think it matters if you said driver presses a switch or sensors.