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Daily Practice · GCSE Computer Science

January 1957 5-a-day

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January 1957

31 sheets · 155 questions · GCSE

January 1957 compilationAll answers

Every sheet in January 1957

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 1957An array named temps holds 12 values. State the index of the first item and the index of the last item.
  2. 2nd January 1957State one example of a file format that commonly uses lossy compression.
  3. 3rd January 1957State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  4. 4th January 1957State whether the source code of proprietary (closed source) software is normally available for the public to view.
  5. 5th January 1957Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  6. 6th January 1957A programmer wants any syntax error in their program to be reported before the program starts running at all. State whether a compiler or an interpreter behaves this way, and explain why.
  7. 7th January 1957Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  8. 8th January 1957State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  9. 9th January 1957Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  10. 10th January 1957A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
  11. 11th January 1957Each 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.
  12. 12th January 1957Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  13. 13th January 1957State the two values a Boolean data type can hold.
  14. 14th January 1957Convert the denary number 39 to an 8-bit binary number, showing your working.
  15. 15th January 1957Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  16. 16th January 1957State why a program written in a high level language must be translated.
  17. 17th January 1957Convert the hexadecimal number 1A to denary.
  18. 18th January 1957Convert the denary number 156 to an 8 bit binary number.
  19. 19th January 1957Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?
  20. 20th January 1957Describe what a nested loop does when it processes a 2D array.
  21. 21st January 1957An image uses a colour depth of 2 bits per pixel. Calculate the maximum number of different colours it can represent.
  22. 22nd January 1957A 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.
  23. 23rd January 1957Describe two negative consequences of throwing away old computer hardware instead of recycling it.
  24. 24th January 1957Write a function called isEven that takes one integer parameter, num, and returns True if num is even and False otherwise.
  25. 25th January 1957Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
  26. 26th January 1957A 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.
  27. 27th January 1957Give two reasons why network communication is divided into layers.
  28. 28th January 1957Explain why iterative testing, carried out throughout development, tends to make errors cheaper to fix than relying only on final testing.
  29. 29th January 1957A table called members has fields memberId, firstName, lastName and joinYear. Write an SQL statement that adds a new record with memberId 12, firstName 'Priya', lastName 'Shah' and joinYear 2026.
  30. 30th January 1957Define the term 'interrupt' as used to describe a signal received by a CPU.
  31. 31st January 1957An 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.