Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

Systems, data representation, networks, algorithms and programming.

6th March 2023

5 questions · GCSE · 123 questions in this band

1
Memory and Primary Storage
State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
2
Secondary Storage
A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.
3
System Software
A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
4
Networks and Topologies
Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
5
Network Security
A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.

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