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Daily Practice · GCSE Computer Science

November 1998 - GCSE Computer Science 5-a-day

Every GCSE Computer Science sheet published in November 1998, with answers. Systems, data representation, networks, algorithms and programming.

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November 1998

30 sheets · 150 questions · GCSE

November 1998 compilationAll answers

Every sheet in November 1998

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

  1. 1st November 1998State whether the source code of proprietary (closed source) software is normally available for the public to view.
  2. 2nd November 1998Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  3. 3rd November 1998A function is defined as: FUNCTION addTax(price) RETURN price x 1.2 ENDFUNCTION. Another line of code runs: total <- addTax(20) + addTax(30). Trace both function calls and state the final value of total.
  4. 4th November 1998Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  5. 5th November 1998Name the four layers of the TCP/IP model in order from the one closest to the user.
  6. 6th November 1998Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  7. 7th November 1998A table called staff has fields staffId, name, department and salary, storing these records: staffId | name | department | salary, 1 | Ben | Sales | 24000, 2 | Chloe | IT | 31000, 3 | Dan | Sales | 27000. State which staffId(s) would be returned by: SELECT staffId FROM staff WHERE department = 'Sales' AND salary > 25000;
  8. 8th November 1998Each 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.
  9. 9th November 1998Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  10. 10th November 1998State the two values a Boolean data type can hold.
  11. 11th November 1998Convert the 8-bit binary number 01011010 to denary.
  12. 12th November 1998Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  13. 13th November 1998A 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.
  14. 14th November 1998Convert the hexadecimal number 1A to denary.
  15. 15th November 1998Convert the denary number 156 to an 8 bit binary number.
  16. 16th November 1998Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  17. 17th November 1998An array named temps holds 12 values. State the index of the first item and the index of the last item.
  18. 18th November 1998An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  19. 19th November 1998A 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.
  20. 20th November 1998Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  21. 21st November 1998Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  22. 22nd November 1998Write the pseudocode header and body for a function called isAdult that takes one integer parameter called age and returns True if age is 18 or over.
  23. 23rd November 1998A 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.
  24. 24th November 1998State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  25. 25th November 1998Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  26. 26th November 1998State what a foreign key is used for.
  27. 27th November 1998Define the term 'interrupt' as used to describe a signal received by a CPU.
  28. 28th November 1998An 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.
  29. 29th November 1998Evaluate X = NOT A AND B when A = 0 and B = 1.
  30. 30th November 1998A 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.