Daily Practice · GCSE Computer Science
April 2023 - GCSE Computer Science 5-a-day
Every GCSE Computer Science sheet published in April 2023, with answers. Systems, data representation, networks, algorithms and programming.
Every sheet in April 2023
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st April 2023A 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.
- 2nd April 2023Define the term 'interrupt' as used to describe a signal received by a CPU.
- 3rd April 2023An array called items contains [12, 45, 7, 30, 19] at indices 0 to 4. Describe how a linear search would locate the value 30, stating the number of comparisons needed.
- 4th April 2023Evaluate X = NOT A AND B when A = 0 and B = 1.
- 5th April 2023Convert the hexadecimal number FF to an 8-bit binary number.
- 6th April 2023Give one advantage of a star topology compared with a mesh topology.
- 7th April 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.
- 8th April 2023Add the 8-bit binary numbers 00101101 and 00010011, giving your answer as an 8-bit binary number.
- 9th April 2023State the three stages of the fetch-decode-execute cycle in the order they occur.
- 10th April 2023State one weakness of a simple shift cipher compared to modern encryption methods used on networks.
- 11th April 2023An array named temps holds 12 values. State the index of the first item and the index of the last item.
- 12th April 2023Define the term 'pixel'.
- 13th April 2023Order these from fastest access speed to slowest: RAM, cache, registers, secondary storage.
- 14th April 2023Which piece of UK legislation makes it a criminal offence to gain unauthorised access to a computer system?
- 15th April 2023Evaluate the expression 23 DIV 4.
- 16th April 2023State the correct order of the three operations used to read data from a text file.
- 17th April 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.
- 18th April 2023State the difference between HTTP and HTTPS, and give one situation where HTTPS is essential.
- 19th April 2023A 'quantity' field on a website must only accept whole numbers from 1 to 10. Which validation check identifies that 15 has been entered?
- 20th April 2023A 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.
- 21st April 2023A row of 8 pixels is WWWBBBWW. Use run-length encoding to encode this row as pairs of (colour, run length).
- 22nd April 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.
- 23rd April 2023Complete: NOT 0 = ?
- 24th April 2023Convert the denary number 200 to hexadecimal, showing your working.
- 25th April 2023State what LAN stands for.
- 26th April 2023State why a program written in a high level language must be translated.
- 27th April 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.
- 28th April 2023Which CPU register holds the address of the next instruction to be fetched?
- 29th April 2023Distinguish between the network security threats known as phishing and pharming.
- 30th April 2023Describe what a nested loop does when it processes a 2D array.