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Daily Practice · GCSE Computer Science

December 1999 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in December 1999, with answers. Systems, data representation, networks, algorithms and programming.

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December 1999

31 sheets · 155 questions · GCSE

December 1999 compilationAll answers

Every sheet in December 1999

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

  1. 1st December 1999Distinguish between the network security threats known as phishing and pharming.
  2. 2nd December 1999Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  3. 3rd December 1999A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  4. 4th December 1999A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  5. 5th December 1999A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
  6. 6th December 1999State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  7. 7th December 1999Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  8. 8th December 1999Give one example of an optical secondary storage device.
  9. 9th December 1999Name the four layers of the TCP/IP model in order from the one closest to the user.
  10. 10th December 1999State the term used for realistic data that a program would be expected to handle during normal use.
  11. 11th December 1999A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
  12. 12th December 1999State the difference between lossy and lossless compression.
  13. 13th December 1999State the condition that must be met before a binary search can be used on an array.
  14. 14th December 1999A 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.
  15. 15th December 1999Convert the hexadecimal number FF to an 8-bit binary number.
  16. 16th December 1999Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
  17. 17th December 1999A 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.
  18. 18th December 1999Convert the denary number 45 to hexadecimal.
  19. 19th December 1999What does the acronym CPU stand for?
  20. 20th December 1999State what the term malware means.
  21. 21st December 1999An array named temps holds 12 values. State the index of the first item and the index of the last item.
  22. 22nd December 1999An 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).
  23. 23rd December 1999Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
  24. 24th December 1999Which piece of UK legislation controls how organisations must store and use people's personal data?
  25. 25th December 1999Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
  26. 26th December 1999State the correct order of the three operations used to read data from a text file.
  27. 27th December 1999Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
  28. 28th December 1999State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  29. 29th December 1999A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
  30. 30th December 1999A 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.
  31. 31st December 1999State one function carried out by the operating system of a computer.