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

January 1981 5-a-day

← Today's GCSE Computer Science sheet

January 1981

31 sheets · 155 questions · GCSE

January 1981 compilationAll answers

Every sheet in January 1981

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 1981Name the four layers of the TCP/IP model in order from the one closest to the user.
  2. 2nd January 1981State what is meant by a syntax error.
  3. 3rd January 1981State what a foreign key is used for.
  4. 4th January 1981What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  5. 5th January 1981Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  6. 6th January 1981Given P = 0 and Q = 1, state the value of P OR Q.
  7. 7th January 1981A 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.
  8. 8th January 1981A network administrator is connecting 10 computers in a server room. Calculate the number of cables needed for a full mesh topology, and state the number needed for a star topology with one central switch.
  9. 9th January 1981A 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.
  10. 10th January 1981Convert the 4-bit binary number 1101 to denary.
  11. 11th January 1981Two CPUs are compared for a task optimised for multiple cores: CPU A has 2 cores at 4.2 GHz; CPU B has 6 cores at 3.0 GHz. Explain which CPU is likely to perform better for this task.
  12. 12th January 1981State why an organisation might employ penetration testers to test its network.
  13. 13th January 1981An array named temps holds 12 values. State the index of the first item and the index of the last item.
  14. 14th January 1981State one example of a file format that commonly uses lossy compression.
  15. 15th January 1981State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  16. 16th January 1981State whether the source code of proprietary (closed source) software is normally available for the public to view.
  17. 17th January 1981Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  18. 18th January 1981State the value returned by LENGTH(word) if word stores the string 'Computer'.
  19. 19th January 1981Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  20. 20th January 1981State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
  21. 21st January 1981Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  22. 22nd January 1981A table called books has fields bookId, title, authorId and copiesAvailable. Write an SQL statement that selects the title of every book with more than 2 copies available.
  23. 23rd January 1981Each 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.
  24. 24th January 1981Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  25. 25th January 1981State the two values a Boolean data type can hold.
  26. 26th January 1981State how many different values can be represented using 5 bits, and explain your reasoning.
  27. 27th January 1981Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.
  28. 28th January 1981State why a program written in a high level language must be translated.
  29. 29th January 1981Convert the hexadecimal number 1A to denary.
  30. 30th January 1981Convert the denary number 156 to an 8 bit binary number.
  31. 31st January 1981Which type of malware can replicate itself and spread across a network without attaching to another program or needing a user to run it?