Daily Practice · GCSE Computer Science
April 2025 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 2025, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 2025
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2025State what the term malware means.
- 2nd April 2025Trace 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).
- 3rd April 2025An uncompressed file is 6000 KB. After lossless compression it is 1500 KB. Calculate the compression ratio in the form n:1 (original size : compressed size).
- 4th April 2025Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 5th April 2025Which piece of UK legislation controls how organisations must store and use people's personal data?
- 6th April 2025Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 7th April 2025A 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.
- 8th April 2025Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 9th April 2025Explain the role of TCP when a large file is downloaded.
- 10th April 2025A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 11th April 2025A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 12th April 2025State one function carried out by the operating system of a computer.
- 13th April 2025In computational thinking, what is meant by the term 'decomposition'?
- 14th April 2025Given A = 1 and B = 1, state the value of A AND B.
- 15th April 2025Convert the denary number 39 to an 8-bit binary number, showing your working.
- 16th April 2025Define a peer-to-peer network.
- 17th April 2025Give one advantage and one disadvantage of using a compiler.
- 18th April 2025Convert the denary number 5 to a 4-bit binary number.
- 19th April 2025A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 20th April 2025A 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.
- 21st April 2025Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 22nd April 2025A mono sound clip has a sample rate of 4000 Hz and lasts 2 seconds. Calculate the total number of samples taken.
- 23rd April 2025State the type of program that is typically stored in ROM.
- 24th April 2025State one reason a small business might choose to use open source software instead of proprietary (closed source) software.
- 25th April 2025A FOR loop runs: total = 0, FOR i = 1 TO 4, total = total + i, NEXT i. State the value of total after the loop finishes.
- 26th April 2025Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 27th April 2025State the typical maximum capacity of a single-layer DVD.
- 28th April 2025A 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?
- 29th April 2025State what is meant by a syntax error.
- 30th April 2025A 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.