Daily Practice - GCSE Computer Science
Systems, data representation, networks, algorithms and programming.
- 1Boolean Logic
Given P = 0 and Q = 1, state the value of P OR Q.
- 2Data Representation: Number Systems
Convert the hexadecimal number 1A to denary.
- 3Data Representation: Images, Sound and Compression
Define the term 'pixel'.
- 4Programming Practice: Writing and Refining Programs
Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 5SQL and Data Handling
A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
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