Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

Systems, data representation, networks, algorithms and programming.

6th February 2025

5 questions · GCSE · 123 questions in this band

1
Memory and Primary Storage
A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
2
Secondary Storage
A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
3
System Software
State the difference between lossy and lossless compression.
4
Networks and Topologies
Define a peer-to-peer network.
5
Network Security
State why an organisation might employ penetration testers to test its network.

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