Revision Library
/Subjects/Computer Science/Daily Practice
Daily Practice · GCSE Computer Science

January 1978 5-a-day

← Today's GCSE Computer Science sheet

January 1978

31 sheets · 155 questions · GCSE

January 1978 compilationAll answers

Every sheet in January 1978

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 1978Convert the 8-bit binary number 10110100 directly to hexadecimal by splitting it into nibbles.
  2. 2nd January 1978Give one advantage of a star topology compared with a mesh topology.
  3. 3rd January 1978Name the translator used for assembly language and describe how it differs from a compiler.
  4. 4th January 1978Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
  5. 5th January 1978State the three stages of the fetch-decode-execute cycle in the order they occur.
  6. 6th January 1978State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
  7. 7th January 1978Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  8. 8th January 1978Define the term 'pixel'.
  9. 9th January 1978Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
  10. 10th January 1978Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
  11. 11th January 1978Evaluate the expression 23 DIV 4.
  12. 12th January 1978A 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.
  13. 13th January 1978A 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.
  14. 14th January 1978Define the term protocol.
  15. 15th January 1978A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
  16. 16th January 1978A 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;
  17. 17th January 1978A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
  18. 18th January 1978An 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.
  19. 19th January 1978Complete: NOT 0 = ?
  20. 20th January 1978Convert the 8-bit binary number 01011010 to denary.
  21. 21st January 1978State what LAN stands for.
  22. 22nd January 1978Explain the purpose of a breakpoint.
  23. 23rd January 1978An 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.
  24. 24th January 1978Which CPU register holds the address of the next instruction to be fetched?
  25. 25th January 1978Distinguish between the network security threats known as phishing and pharming.
  26. 26th January 1978Explain why a running maximum should be initialised to the first element of the array rather than to 0.
  27. 27th January 1978A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
  28. 28th January 1978A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
  29. 29th January 1978A 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.
  30. 30th January 1978State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
  31. 31st January 1978Write 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.