Daily Practice · GCSE Computer Science
September 2018 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in September 2018, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in September 2018
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 2018State the term used for realistic data that a program would be expected to handle during normal use.
- 2nd September 2018A 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 September 2018State the difference between lossy and lossless compression.
- 4th September 2018State the condition that must be met before a binary search can be used on an array.
- 5th September 2018A 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 September 2018Convert the hexadecimal number FF to an 8-bit binary number.
- 7th September 2018Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 8th September 2018Describe what syntax highlighting is and how it helps a programmer.
- 9th September 2018Convert the denary number 45 to hexadecimal.
- 10th September 2018What does the acronym CPU stand for?
- 11th September 2018State what the term malware means.
- 12th September 2018Trace 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).
- 13th September 2018An 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 September 2018Which of RAM and ROM is volatile, meaning its contents are lost when the power is removed?
- 15th September 2018Which piece of UK legislation controls how organisations must store and use people's personal data?
- 16th September 2018Given x = 5 and y = 8, state whether x < y AND x > 0 evaluates to True or False.
- 17th September 2018State the correct order of the three operations used to read data from a text file.
- 18th September 2018Give one reason why RAM on its own is not enough, and a computer also needs secondary storage.
- 19th September 2018Explain the role of TCP when a large file is downloaded.
- 20th September 2018A password field requires between 6 and 12 characters. State two boundary data values that should be used to test this field.
- 21st September 2018A 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 September 2018State one function carried out by the operating system of a computer.
- 23rd September 2018In computational thinking, what is meant by the term 'decomposition'?
- 24th September 2018Given A = 1 and B = 1, state the value of A AND B.
- 25th September 2018Convert the denary number 200 to hexadecimal, showing your working.
- 26th September 2018Define a peer-to-peer network.
- 27th September 2018Give one advantage and one disadvantage of using a compiler.
- 28th September 2018Convert the denary number 5 to a 4-bit binary number.
- 29th September 2018A CPU has a clock speed of 4.0 GHz. Calculate how many clock cycles it completes in 2 seconds.
- 30th September 2018A 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.