Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

2nd February 1998

5 questions · GCSE · 123 questions in this band

1
Data Representation: Number Systems
Convert the denary number 45 to hexadecimal.
2
Data Representation: Images, Sound and Compression
A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
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.

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