M4-R5.1 · topic · O Level online test
M4-R5.1 · Security and the connected future
Chapter drill with a short clock and explanations after you submit.
- Questions
- 16
- Clock
- 19 min
- Marks
- 16
- Negative
- None
Before the clock starts
- Stay on this tab. Leaving does not pause the timer once the paper has begun.
- Use the palette to jump. Green is answered, gold is marked, white is blank.
- Keys 1–4 pick an option. N and P move. M marks for review.
- There is no negative marking on OPrep. The official paper also uses +1 / 0.
- On submit you get a unit-wise score and the full key with explanations.
- Attempts stay in this browser only. Clearing site data deletes them.