Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

26th December 1997

5 questions · GCSE · 123 questions in this band

1
Data Representation: Number Systems
Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
2
Data Representation: Images, Sound and Compression
A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
3
Programming Practice: Writing and Refining Programs
State the correct order of the three operations used to read data from a text file.
4
SQL and Data Handling
State what a foreign key is used for.
5
Trace Tables and Binary/Hex Conversions
Convert the denary number 39 to an 8-bit binary number, showing your working.

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