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Daily Practice · GCSE Computer Science

June 1990 5-a-day

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June 1990

30 sheets · 150 questions · GCSE

June 1990 compilationAll answers

Every sheet in June 1990

The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.

  1. 1st June 1990Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  2. 2nd June 1990Define the term protocol.
  3. 3rd June 1990Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  4. 4th June 1990A 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.
  5. 5th June 1990Each pair from the previous question is stored using 2 bytes. Calculate the compression ratio achieved, given the uncompressed row (1 byte per pixel) uses 8 bytes.
  6. 6th June 1990Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  7. 7th June 1990State the two values a Boolean data type can hold.
  8. 8th June 1990Convert the denary number 200 to hexadecimal, showing your working.
  9. 9th June 1990Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  10. 10th June 1990Explain the purpose of a breakpoint.
  11. 11th June 1990Convert the hexadecimal number 1A to denary.
  12. 12th June 1990Convert the denary number 156 to an 8 bit binary number.
  13. 13th June 1990Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  14. 14th June 1990Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  15. 15th June 1990An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  16. 16th June 1990A CPU's cache has a hit rate of 80%. During a task the CPU makes 4000 requests for data. Calculate the number of cache hits and cache misses.
  17. 17th June 1990Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  18. 18th June 1990Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  19. 19th June 1990State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  20. 20th June 1990A 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.
  21. 21st June 1990Name the four layers of the TCP/IP model in order from the one closest to the user.
  22. 22nd June 1990Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  23. 23rd June 1990Define the term 'primary key' as used in a database table.
  24. 24th June 1990Define the term 'interrupt' as used to describe a signal received by a CPU.
  25. 25th June 1990An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
  26. 26th June 1990Evaluate X = NOT A AND B when A = 0 and B = 1.
  27. 27th June 1990Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  28. 28th June 1990Give one advantage of a star topology compared with a mesh topology.
  29. 29th June 1990A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
  30. 30th June 1990Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.