Daily Practice · GCSE Computer Science
June 2023 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in June 2023, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in June 2023
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st June 2023Convert the 8-bit binary number 01011010 to denary.
- 2nd June 2023Define a peer-to-peer network.
- 3rd June 2023Describe what syntax highlighting is and how it helps a programmer.
- 4th June 2023Convert the denary number 5 to a 4-bit binary number.
- 5th June 2023A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 6th June 2023A simple cipher shifts every letter 2 places forward in the alphabet, wrapping around so Y becomes A and Z becomes B. Encrypt the plaintext CAT using this cipher.
- 7th June 2023Trace this algorithm with data = [4, 9, 2, 9, 7] and state the final output. total = 0; count = 0; for i = 0 to 4: if data[i] > 5 then total = total + data[i] and count = count + 1; next i; print(total, count).
- 8th June 2023A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 9th June 2023State the type of program that is typically stored in ROM.
- 10th June 2023State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 11th June 2023A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 12th June 2023Write 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.
- 13th June 2023State the typical maximum capacity of a single-layer DVD.
- 14th June 2023Explain the role of TCP when a large file is downloaded.
- 15th June 2023State what is meant by a syntax error.
- 16th June 2023State what a foreign key is used for.
- 17th June 2023What type of utility software reorganises files on a hard disk so fragmented parts are stored closer together?
- 18th June 2023Calculate the maximum number of comparisons required by a binary search on a sorted list of 512 items.
- 19th June 2023Given P = 0 and Q = 1, state the value of P OR Q.
- 20th June 2023A 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.
- 21st June 2023A 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.
- 22nd June 2023Give one advantage and one disadvantage of using a compiler.
- 23rd June 2023Convert the 4-bit binary number 1101 to denary.
- 24th June 2023Two 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.
- 25th June 2023State why an organisation might employ penetration testers to test its network.
- 26th June 2023Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 27th June 2023State one example of a file format that commonly uses lossy compression.
- 28th June 2023State how many bits are in one byte, and how many bytes are in one kibibyte (KiB).
- 29th June 2023State whether the source code of proprietary (closed source) software is normally available for the public to view.
- 30th June 2023Write one line of pseudocode that converts the string stored in heightInput into a real number and stores it in a variable called height.