Daily Practice · GCSE Computer Science
March 2021 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in March 2021, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in March 2021
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st March 2021State the term used for realistic data that a program would be expected to handle during normal use.
- 2nd March 2021A 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.
- 3rd March 2021State the difference between lossy and lossless compression.
- 4th March 2021State the condition that must be met before a binary search can be used on an array.
- 5th March 2021A logic circuit has inputs C and D. C feeds into a NOT gate; the output of the NOT gate and D feed into an OR gate, giving output Y. Write the Boolean expression for Y and state its value when C = 1 and D = 0.
- 6th March 2021Convert the hexadecimal number FF to an 8-bit binary number.
- 7th March 2021Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 8th March 2021Explain why an interpreter is often preferred while a program is being written.
- 9th March 2021Convert the denary number 45 to hexadecimal.
- 10th March 2021What does the acronym CPU stand for?
- 11th March 2021State what the term malware means.
- 12th March 2021A 2D array grid is declared as grid[4][6]. State how many rows and columns it has and how many elements it holds in total.
- 13th March 2021An 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).
- 14th March 2021Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 15th March 2021Which piece of UK legislation controls how organisations must store and use people's personal data?
- 16th March 2021Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 17th March 2021State the correct order of the three operations used to read data from a text file.
- 18th March 2021Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 19th March 2021State the layer that IP operates in, and describe its job.
- 20th March 2021A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 21st March 2021A table called products has fields productId, name, price and stock. Write an SQL statement that changes the price of the product with productId 7 to 15.99.
- 22nd March 2021State one function carried out by the operating system of a computer.
- 23rd March 2021In computational thinking, what is meant by the term 'decomposition'?
- 24th March 2021Given A = 1 and B = 1, state the value of A AND B.
- 25th March 2021Convert the denary number 200 to hexadecimal, showing your working.
- 26th March 2021Define a peer-to-peer network.
- 27th March 2021Describe what syntax highlighting is and how it helps a programmer.
- 28th March 2021Convert the denary number 5 to a 4-bit binary number.
- 29th March 2021A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 30th March 2021A 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.
- 31st March 2021Trace 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).