How did you do in Computing's mock GCSE?
Below are the answers to Computing's mock Computer Science GCSE using question's from EdExcel's new examination paper.
If you came to this page first by mistake, click here to return to the main article.
Answers
Question 1:
Any two of:
- Large storage capacity
- Non-volatile
- Fast data access speed
- Portable
(2 marks)
Question 2:
a) A temporary store (1) for data and instructions/programs (1)
(2 marks)
b) Any one of:
- To reduce download time/increase transfer speed
- To reduce amount of storage space required
(1 mark)
c) Any one of:
- R4B2R1Y3
- R4B2RY3
- 4R2BR3Y
- 4R2B1R3Y
One incorrect character or digit in a correct response can only be awarded one mark
(2 marks)
Question 3:
Number of bits = 5 x 2000 x 1024 x 1024 (1)
Time = Number of bits/transfer rate
OR
Time = Number of bits/bps (1)
(2 marks)
Question 4:
Provides a small amount of storage in the processor (1), holds an instruction/memory address/data value (1)
(2 marks)
Question 5:
a) Correct calculation using variables (1)
For example:
DIVIDE TotalTime by NumberLaps (1)
TotalTime/NumberLaps (1)
Use of variable for result (1)
For example:
SET AverageTime (1)
STORE AverageTime (1)
(2 marks)
b) Any one suitable benefit with expansion:
- Makes code easier to understand (1)
- Because it uses user-friendly language (1)
- Quicker to write subprogram (1)
- Because standard routines (wizards) available (1)
- Easier to modify (maintain) (1) because of meaningful variable names/clarifying comments (1)
- Machine independent/can run on a variety of hardware (1) because program can be compiled as required for particular computers
(2 marks)
c) Any one of:
- Can be re-used
- Improves readability of program
- Easier to debug a small chunk of code rather than a whole program
- Make it easier to divide the task up between a number of programmers
(15 total marks)