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Daily Practice · GCSE Computer Science

December 2003 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in December 2003, with answers. Systems, data representation, networks, algorithms and programming.

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December 2003

31 sheets · 155 questions · GCSE

December 2003 compilationAll answers

Every sheet in December 2003

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 2003Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  2. 2nd December 2003State the three stages of the fetch-decode-execute cycle in the order they occur.
  3. 3rd December 2003State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  4. 4th December 2003Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  5. 5th December 2003Define the term 'pixel'.
  6. 6th December 2003Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  7. 7th December 2003Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  8. 8th December 2003Evaluate the expression 23 DIV 4.
  9. 9th December 2003State the value returned by LENGTH(word) if word stores the string 'Computer'.
  10. 10th December 2003A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
  11. 11th December 2003Name the four layers of the TCP/IP model in order from the one closest to the user.
  12. 12th December 2003A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  13. 13th December 2003A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
  14. 14th December 2003A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  15. 15th December 2003An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
  16. 16th December 2003Complete: NOT 0 = ?
  17. 17th December 2003State how many different values can be represented using 5 bits, and explain your reasoning.
  18. 18th December 2003State what LAN stands for.
  19. 19th December 2003A 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.
  20. 20th December 2003An 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.
  21. 21st December 2003Which CPU register holds the address of the next instruction to be fetched?
  22. 22nd December 2003Distinguish between the network security threats known as phishing and pharming.
  23. 23rd December 2003An array named temps holds 12 values. State the index of the first item and the index of the last item.
  24. 24th December 2003A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  25. 25th December 2003A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  26. 26th December 2003A 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.
  27. 27th December 2003State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  28. 28th December 2003State the key difference between a procedure and a function.
  29. 29th December 2003Give one example of an optical secondary storage device.
  30. 30th December 2003State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  31. 31st December 2003State the term used for realistic data that a program would be expected to handle during normal use.