Daily Practice · GCSE Computer Science
December 1974 5-a-day
Every sheet in December 1974
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st December 1974Give two reasons why network communication is divided into layers.
- 2nd December 1974A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 3rd December 1974A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 4th December 1974A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 5th December 1974An 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.
- 6th December 1974Complete: NOT 0 = ?
- 7th December 1974Convert the denary number 39 to an 8-bit binary number, showing your working.
- 8th December 1974State what LAN stands for.
- 9th December 1974Explain why an interpreter is often preferred while a program is being written.
- 10th December 1974An 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.
- 11th December 1974Which CPU register holds the address of the next instruction to be fetched?
- 12th December 1974Distinguish between the network security threats known as phishing and pharming.
- 13th December 1974A 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.
- 14th December 1974A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 15th December 1974A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 16th December 1974A 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.
- 17th December 1974State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 18th December 1974Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 19th December 1974Give one example of an optical secondary storage device.
- 20th December 1974State the layer that IP operates in, and describe its job.
- 21st December 1974State the term used for realistic data that a program would be expected to handle during normal use.
- 22nd December 1974A 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.
- 23rd December 1974State the difference between lossy and lossless compression.
- 24th December 1974State the condition that must be met before a binary search can be used on an array.
- 25th December 1974A 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.
- 26th December 1974Convert the hexadecimal number FF to an 8-bit binary number.
- 27th December 1974Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 28th December 1974Describe what syntax highlighting is and how it helps a programmer.
- 29th December 1974Convert the denary number 45 to hexadecimal.
- 30th December 1974What does the acronym CPU stand for?
- 31st December 1974State what the term malware means.