Computer Science – Full Practice Paper

Progression Step 5 · Years 10–11

75 mins · 54 marks · Both

Practice only – not official WJEC past papers. Use alongside your school teaching and revision guides.

Show working for conversions. 75 minutes.

Question 1[4 marks]
Convert 10110100 binary to denary.
Question 2[6 marks]
Pseudocode: input 5 numbers, output largest.
Question 3[4 marks]
LAN vs WAN.
Question 4[6 marks]
Two methods to prevent unauthorised network access.
Question 5[6 marks]
Purpose of fetch–decode–execute. Name stages.
Question 6[6 marks]
Syntax vs logic error with examples.
Question 7[6 marks]
SQL: list names of pupils in Year 10 from table Pupils.
Question 8[4 marks]
What is the difference between RAM and secondary storage?
Question 9[6 marks]
Describe phishing and one way users can protect themselves.
Question 10[6 marks]
Explain the need for validation and authentication in robust programs.