Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

Systems, data representation, networks, algorithms and programming.

20th February 2025

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
A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
4
SQL and Data Handling
Give one advantage of a relational database over a flat-file database.
5
Trace Tables and Binary/Hex Conversions
Convert the denary number 200 to hexadecimal, showing your working.

You are looking at an earlier sheet. Today's sheet is the one that adds a day.

Your run is kept in this browser only, and there is no account.

Every sheet is deterministic: the same date always regenerates the same five questions. All of February 2025, including the monthly compilation PDF.