Computer viruses and protection
Answers are for parents and teachers.
1
A worm triples every hour. Starting from 1, how many after 4 hours?
81
2
How many seconds does a full scan of a 240 GB disk take at 60 MB/s? (1 GB = 1024 MB)
4096
3
Write in two sentences how a backup helps against ransomware.
If the files are encrypted they are restored from a clean backup. There is no need to pay the ransom and enrich the criminal.
4
Write two actions to take when you plug a flash drive into a computer, before opening any files on it.
Scan it with an antivirus; switch off autorun.
5
A phone app asks for permission to the camera, contacts and location, but it is a simple torch. What do you do and why?
I do not allow it or do not install it: permissions unrelated to the task can be a sign of spyware.