Daily Practice · GCSE Computer Science
September 1978 5-a-day
Every sheet in September 1978
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st September 1978A table called bookings has fields bookingId, customerName and eventDate. Write an SQL statement that deletes the booking with bookingId 45.
- 2nd September 1978A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 3rd September 1978An 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.
- 4th September 1978Complete: NOT 0 = ?
- 5th September 1978Convert the denary number 39 to an 8-bit binary number, showing your working.
- 6th September 1978State what LAN stands for.
- 7th September 1978Give one advantage and one disadvantage of using a compiler.
- 8th September 1978An 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.
- 9th September 1978Which CPU register holds the address of the next instruction to be fetched?
- 10th September 1978Distinguish between the network security threats known as phishing and pharming.
- 11th September 1978Write a loop in pseudocode that outputs every element of a 1D array named names of length 6.
- 12th September 1978A row of pixels is encoded using run-length encoding as: 3W 4B 3W. State the original row of pixels it represents.
- 13th September 1978A photo file is 3.5 MB in size. Calculate its size in kilobytes (KB). Use 1 MB = 1000 KB.
- 14th September 1978A 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.
- 15th September 1978State the most appropriate data type for storing a person's shoe size if only whole sizes (e.g. 7, 8, 9) are allowed.
- 16th September 1978Give one specific way this code could be refined without changing what it does: a = 5, b = 3, c = a + b, PRINT c
- 17th September 1978Give one example of an optical secondary storage device.
- 18th September 1978A 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?
- 19th September 1978State the term used for realistic data that a program would be expected to handle during normal use.
- 20th September 1978A 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.
- 21st September 1978State the difference between lossy and lossless compression.
- 22nd September 1978State the condition that must be met before a binary search can be used on an array.
- 23rd September 1978A 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.
- 24th September 1978Convert the hexadecimal number FF to an 8-bit binary number.
- 25th September 1978Which piece of network hardware connects a LAN to another network such as the internet, directing data packets based on IP address?
- 26th September 1978Name the translator used for assembly language and describe how it differs from a compiler.
- 27th September 1978Convert the denary number 45 to hexadecimal.
- 28th September 1978What does the acronym CPU stand for?
- 29th September 1978State what the term malware means.
- 30th September 1978Explain what happens if a program tries to read index 5 of an array declared with 5 elements.