Daily Practice · GCSE Computer Science

Daily Practice - GCSE Computer Science

24th May 1997

5 questions · GCSE · 123 questions in this band

1
SQL and Data Handling
A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
2
Trace Tables and Binary/Hex Conversions
Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
3
Systems Architecture
A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
4
Memory and Primary Storage
State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
5
Secondary Storage
A company backs up its files onto magnetic tape cartridges, each with a capacity of 3 TB. The company needs to back up 20 TB of data. Calculate the minimum number of cartridges needed.

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