Daily Practice - GCSE Computer Science
Systems, data representation, networks, algorithms and programming.
- 1Memory and Primary Storage
A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 2Secondary Storage
Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 3System Software
What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 4Networks and Topologies
Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
- 5Network Security
State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
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