Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

Systems, data representation, networks, algorithms and programming.

19th October 2023

5 questions · GCSE · 123 questions in this band

1
Data Representation: Images, Sound and Compression
State one example of a file format that commonly uses lossy compression.
2
Programming Practice: Writing and Refining Programs
State the key difference between a procedure and a function.
3
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.
4
Trace Tables and Binary/Hex Conversions
A pseudocode algorithm is: count <- 0, x <- 10, WHILE x > 0, count <- count + 1, x <- x - 3, ENDWHILE, OUTPUT count. Complete a trace table for x and count, laid out as x | count, then state the value output.
5
Systems Architecture
A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.

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