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Daily Practice · GCSE Computer Science

January 1958 5-a-day

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January 1958

31 sheets · 155 questions · GCSE

January 1958 compilationAll answers

Every sheet in January 1958

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

  1. 1st January 1958Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  2. 2nd January 1958State the pseudocode operator commonly used to join (concatenate) two strings, then show how it joins 'Rev' and 'ision' to produce 'Revision'.
  3. 3rd January 1958A 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.
  4. 4th January 1958Define the term protocol.
  5. 5th January 1958Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  6. 6th January 1958Define the term 'primary key' as used in a database table.
  7. 7th January 1958Define the term 'interrupt' as used to describe a signal received by a CPU.
  8. 8th January 1958An 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.
  9. 9th January 1958Evaluate X = NOT A AND B when A = 0 and B = 1.
  10. 10th January 1958Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  11. 11th January 1958Give one advantage of a star topology compared with a mesh topology.
  12. 12th January 1958Explain the purpose of a breakpoint.
  13. 13th January 1958Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  14. 14th January 1958State the three stages of the fetch-decode-execute cycle in the order they occur.
  15. 15th January 1958State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  16. 16th January 1958Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  17. 17th January 1958Define the term 'pixel'.
  18. 18th January 1958Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  19. 19th January 1958Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  20. 20th January 1958Evaluate the expression 23 DIV 4.
  21. 21st January 1958A 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.
  22. 22nd January 1958A 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.
  23. 23rd January 1958Name the four layers of the TCP/IP model in order from the one closest to the user.
  24. 24th January 1958A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  25. 25th January 1958A 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;
  26. 26th January 1958A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  27. 27th January 1958An 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.
  28. 28th January 1958Complete: NOT 0 = ?
  29. 29th January 1958Convert the 8-bit binary number 01011010 to denary.
  30. 30th January 1958State what LAN stands for.
  31. 31st January 1958A 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.