Daily Practice · GCSE Computer Science
December 2023 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in December 2023, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in December 2023
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 2023A 1 TB hard disk drive costs 40 pounds. A 500 GB solid-state drive costs 60 pounds. Calculate the cost per gigabyte of each device, and state which is cheaper per GB. Use 1 TB = 1000 GB.
- 2nd December 2023Define the term protocol.
- 3rd December 2023A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 4th December 2023A 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.
- 5th December 2023A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 6th December 2023An array contains [9, 2, 6], to be sorted using insertion sort. Show the state of the array after each new element has been inserted into its correct position.
- 7th December 2023Complete: NOT 0 = ?
- 8th December 2023State how many different values can be represented using 5 bits, and explain your reasoning.
- 9th December 2023State what LAN stands for.
- 10th December 2023Explain the purpose of a breakpoint.
- 11th December 2023An 8-bit register stores the value 01100000 (denary 96). State the resulting 8-bit binary value after a left shift by 1 place, and state whether an overflow occurs.
- 12th December 2023Which CPU register holds the address of the next instruction to be fetched?
- 13th December 2023Distinguish between the network security threats known as phishing and pharming.
- 14th December 2023Explain why a running maximum should be initialised to the first element of the array rather than to 0.
- 15th December 2023A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 16th December 2023A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 17th December 2023A streaming company records which shows each user watches and uses this to recommend similar shows. Explain one ethical concern this could raise, even if the company only uses the data to improve recommendations.
- 18th December 2023State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 19th December 2023State the key difference between a procedure and a function.
- 20th December 2023Give one example of an optical secondary storage device.
- 21st December 2023Name the four layers of the TCP/IP model in order from the one closest to the user.
- 22nd December 2023State the term used for realistic data that a program would be expected to handle during normal use.
- 23rd December 2023Give one advantage of a relational database over a flat-file database.
- 24th December 2023State the difference between lossy and lossless compression.
- 25th December 2023State the condition that must be met before a binary search can be used on an array.
- 26th December 2023A 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.
- 27th December 2023Convert the hexadecimal number 3F to denary.
- 28th December 2023Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 29th December 2023A program compiles and runs but always outputs an average that is too small. State the type of error and explain why the translator did not report it.
- 30th December 2023Convert the denary number 45 to hexadecimal.
- 31st December 2023What does the acronym CPU stand for?