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Daily Practice · GCSE Computer Science

January 1973 5-a-day

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January 1973

31 sheets · 155 questions · GCSE

January 1973 compilationAll answers

Every sheet in January 1973

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 1973An 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.
  2. 2nd January 1973Evaluate X = NOT A AND B when A = 0 and B = 1.
  3. 3rd January 1973Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  4. 4th January 1973Give one advantage of a star topology compared with a mesh topology.
  5. 5th January 1973A 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.
  6. 6th January 1973Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  7. 7th January 1973State the three stages of the fetch-decode-execute cycle in the order they occur.
  8. 8th January 1973State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  9. 9th January 1973An array named temps holds 12 values. State the index of the first item and the index of the last item.
  10. 10th January 1973Define the term 'pixel'.
  11. 11th January 1973Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  12. 12th January 1973Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  13. 13th January 1973Evaluate the expression 23 DIV 4.
  14. 14th January 1973A 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.
  15. 15th January 1973A 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.
  16. 16th January 1973State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  17. 17th January 1973A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  18. 18th January 1973A 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;
  19. 19th January 1973A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  20. 20th January 1973An 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.
  21. 21st January 1973Complete: NOT 0 = ?
  22. 22nd January 1973Convert the 8-bit binary number 01011010 to denary.
  23. 23rd January 1973State what LAN stands for.
  24. 24th January 1973State why a program written in a high level language must be translated.
  25. 25th January 1973An 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.
  26. 26th January 1973Which CPU register holds the address of the next instruction to be fetched?
  27. 27th January 1973Distinguish between the network security threats known as phishing and pharming.
  28. 28th January 1973Describe what a nested loop does when it processes a 2D array.
  29. 29th January 1973A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  30. 30th January 1973A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  31. 31st January 1973A 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.