Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

Systems, data representation, networks, algorithms and programming.

18th November 2023

5 questions · GCSE · 123 questions in this band

1
Boolean Logic
Evaluate X = NOT A AND B when A = 0 and B = 1.
2
Data Representation: Number Systems
An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
3
Data Representation: Images, Sound and Compression
An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
4
Programming Practice: Writing and Refining Programs
State the key difference between a procedure and a function.
5
SQL 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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