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Daily Practice · GCSE Computer Science

April 1977 5-a-day

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April 1977

30 sheets · 150 questions · GCSE

April 1977 compilationAll answers

Every sheet in April 1977

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

  1. 1st April 1977A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
  2. 2nd April 1977Write 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.
  3. 3rd April 1977State the typical maximum capacity of a single-layer DVD.
  4. 4th April 1977A user reads the same email on a phone and a tablet, and deleting it on one deletes it on the other. Which protocol is in use and why?
  5. 5th April 1977State what is meant by a syntax error.
  6. 6th April 1977State what a foreign key is used for.
  7. 7th April 1977What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
  8. 8th April 1977Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
  9. 9th April 1977Given P = 0 and Q = 1, state the value of P OR Q.
  10. 10th April 1977A 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.
  11. 11th April 1977A 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.
  12. 12th April 1977Name the translator used for assembly language and describe how it differs from a compiler.
  13. 13th April 1977Convert the 4-bit binary number 1101 to denary.
  14. 14th April 1977Two 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.
  15. 15th April 1977State why an organisation might employ penetration testers to test its network.
  16. 16th April 1977Explain what happens if a program tries to read index 5 of an array declared with 5 elements.
  17. 17th April 1977State one example of a file format that commonly uses lossy compression.
  18. 18th April 1977State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
  19. 19th April 1977State whether the source code of proprietary (closed source) software is normally available for the public to view.
  20. 20th April 1977Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.
  21. 21st April 1977State the value returned by LENGTH(word) if word stores the string 'Computer'.
  22. 22nd April 1977Order these units of data from smallest to largest: megabyte, byte, gigabyte, kilobyte.
  23. 23rd April 1977Define the term protocol.
  24. 24th April 1977Give one example of erroneous test data for a field that only accepts whole numbers from 1 to 10.
  25. 25th April 1977A 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.
  26. 26th April 1977Each 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.
  27. 27th April 1977Which flowchart symbol shape is used to represent a decision point (e.g. a yes/no branch)?
  28. 28th April 1977State the two values a Boolean data type can hold.
  29. 29th April 1977State how many different values can be represented using 5 bits, and explain your reasoning.
  30. 30th April 1977Calculate the number of cables needed to connect 8 computers in a full mesh topology, where every computer connects directly to every other computer.