Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

3rd January 1998

5 questions · GCSE · 123 questions in this band

1
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.
2
SQL and Data Handling
Give one advantage of a relational database over a flat-file database.
3
Trace Tables and Binary/Hex Conversions
Convert the denary number 200 to hexadecimal, showing your working.
4
Systems Architecture
Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
5
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.

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