Daily Practice - GCSE Computer Science
Systems, data representation, networks, algorithms and programming.
18th April 2024
- 1Boolean Logic
A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 2Data Representation: Number Systems
Convert the denary number 5 to a 4-bit binary number.
- 3Data Representation: Images, Sound and Compression
State one example of a file format that commonly uses lossy compression.
- 4Programming Practice: Writing and Refining Programs
State the key difference between a procedure and a function.
- 5SQL and Data Handling
A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
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